ENSTROM 480B OPERATOR’S MANUAL AND FAA APPROVED ROTORCRAFT FLIGHT MANUAL

ENSTROM 480B TURBINE · Pilot's Operating Handbook

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Overview

The Enstrom 480B Operator's Manual is a comprehensive guide for the operation and maintenance of the Enstrom 480B helicopter. It includes essential information such as operating limitations, normal and emergency procedures, performance data, and weight and balance considerations.

The manual is FAA approved and includes revisions up to March 2025.
It contains detailed operating limitations and normal procedures.
Emergency procedures are outlined for safe operation.
Performance data is provided for various flight conditions.
Weight and balance information is crucial for safe loading.
Optional equipment supplements are listed for additional capabilities.
The manual includes a checklist for quick reference during operations.

Document

Source

Originally published by enstromhelicopter.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.

View original at enstromhelicopter.com

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Document details

Type: Pilot's Operating Handbook
Year: 2025
File size: 970 KB
Publisher: enstromhelicopter.com
Language: en

About this document

What is the ENSTROM 480B OPERATOR’S MANUAL AND FAA APPROVED ROTORCRAFT FLIGHT MANUAL?

The ENSTROM 480B OPERATOR’S MANUAL AND FAA APPROVED ROTORCRAFT FLIGHT MANUAL is a pilot's operating handbook for the ENSTROM 480B TURBINE, dated 2025.

Where does the ENSTROM 480B OPERATOR’S MANUAL AND FAA APPROVED ROTORCRAFT FLIGHT MANUAL come from?

This copy of the ENSTROM 480B OPERATOR’S MANUAL AND FAA APPROVED ROTORCRAFT FLIGHT MANUAL was originally published by enstromhelicopter.com and is hosted on Sprinkle as a free, searchable reference copy.

What year was the ENSTROM 480B OPERATOR’S MANUAL AND FAA APPROVED ROTORCRAFT FLIGHT MANUAL published?

The ENSTROM 480B OPERATOR’S MANUAL AND FAA APPROVED ROTORCRAFT FLIGHT MANUAL — the ENSTROM 480B TURBINE pilot's operating handbook on file — is dated 2025.

Documentation completeness

1/7

Most owners only have the POH. Here's the essential set for the ENSTROM 480B TURBINE.

Pilot's Operating Handbook / AFM
Checklist
Maintenance Manual
Parts Catalog (IPC)
Systems & Wiring
Service Bulletins on file
Type Certificate (TCDS)

More ENSTROM 480B TURBINEmanuals & documents

ENSTROM 480B OPERATOR'S MANUALPilot's Operating Handbook

In this document

Introduction

The introduction provides an overview of the manual and its purpose.

Operating Limitations

This section outlines the operational limits of the helicopter to ensure safe flying.

Normal Procedures

Normal operating procedures are detailed for routine flight operations.

Emergency Procedures

Emergency procedures are specified to handle in-flight emergencies effectively.

Performance Data

Performance data is provided to inform pilots about the helicopter's capabilities.

Weight/Balance and Loading

Guidelines for weight distribution and loading are included to maintain safety.

Full document text

March 20,2025 Page 1 of 2 2209 22nd Street | Menominee, MI 49858 EnstromHelicopter.com | 906.863.1200 ENSTROM 480B OPERATOR’S MANUAL AND FAA APPROVED ROTORCRAFT FLIGHT MANUAL REPORT NO. 28-AC-023, Revision 25 Change Pages Revision 25, dated 27 Jan 2025, applies to the Enstrom 480B Operator’s and FAA Approved Rotorcraft Flight Manual. Incorporate this revision by removing and inserting the pages listed below. Remove pages Insert pages i through xiv i through xvi INTRO-1 through INTRO-2 INTRO-1 through INTRO-2 INTRO-5 through INTRO-10 INTRO-5 through INTRO-10 1-1 through 1-2 1-1 through 1-2 1-7 through 1-10 1-7 through 1-10 1-23 through 1-26 1-23 through 1-26 2-1 through 2-2 2-1 through 2-2 2-21 through 2-22 2-21 through 2-22 2-31 through 2-32 2-31 through 2-32 3-1 through 3-4 3-1 through 3-4 4-1 through 4-4 4-1 through 4-4 4-15 through 4-16 4-15 through 4-16 5-1-1 through 5-1-2 5-1-1 through 5-1-2 5-2-1 through 5-2-2 5-2-1 through 5-2-2 5-3-1 through 5-3-2 5-3-1 through 5-3-2 5-4-1 through 5-4-2 5-4-1 through 5-4-2 5-5-1 through 5-5-2 5-5-1 through 5-5-2 5-6-1 through 5-6-2 5-6-1 through 5-6-2 ........................................ Continued next page ........................................ March 20, 2025 Page 2 of 2 Remove pages Insert pages 5-7-1 through 5-7-2 5-7-1 through 5-7-2 5-8-1 through 5-8-2 5-8-1 through 5-8-2 5-9-1 through 5-9-4 5-9-1 through 5-9-4 5-10-1 through 5-10-2 5-10-1 through 5-10-2 6-1 through 6-2 6-1 through 6-2 6-17 through 6-18 6-17 through 6-18 7-1 through 7-4.2 7-1 through 7-4.2 7-19 through 7-20 7-19 through 7-20 7-25 through 7-26 7-25 through 7-26 7-28.1 through 7-28.2 7-28.1 through 7-28.2 7-31 through 7-32 7-31 through 7-32 7-49 through 7-50 7-49 through 7-50 7-53 through 7-54 7-53 through 7-54 7-59 through 7-60 7-59 through 7-60 7-69 through 7-70.2 7-69 through 7-70.2 7-71 through 7-72 7-71 through 7-72 8-1 through 8-8 8-1 through 8-8 8-11 through 8-12 8-11 through 8-12 8-19 through 8-24 8-19 through 8-24 8-27 through 8-28 8-27 through 8-30 9-1 through 9-8 9-1 through 9-8 10-1 through 10-2 10-1 through 10-2 10-15 through 10-16 10-15 through 10-16 ..................................................... End ..................................................... ENSTROM 480B OPERATOR'S MANUAL i FAA Approved: May 21/19 Rev. 24 Report No. 28-AC-023 May 2/19 LOG OF REVISIONS Rev. No. Date FAA Approved 1 April 10/02 Joseph C. Miess 2 Sept 05/03 Joseph C. Miess 3 Feb 2/04 Joseph C. Miess 4 Sep 9/04 Joseph C. Miess 5 Sep 27/04 Joseph C. Miess 6 Apr 11/05 Joseph C. Miess 7 Jun 6/06 Joseph C. Miess 8 Sep 17/06 Joseph C. Miess 9 Mar 6/07 Joseph C. Miess 10 Apr 11/07 Joseph C. Miess 11 Dec 5/07 Joseph C. Miess 12 Feb 14/08 Joseph C. Miess 13 Apr 23/08 Joseph C. Miess 14 Apr 16/10 Joseph C. Miess 15 Jul 16/10 Joseph C. Miess 16 Sep 20/10 Joseph C. Miess 17 Jan 25/11 Joseph C. Miess 18 Jul 15/11 M. W. Anderson 19 Jan 18/12 Joseph C. Miess 20 Jul 3/12 Joseph C. Miess 21 Jan 14/13 Joseph C. Miess 22 Aug 17/15 Ronald D. McElroy 23 May 19/16 Ronald D. McElroy 24 May 21/19 Ryan Nelson Approved by the Manager, Southwest Flight Test Section, AIR-713 Federal Aviation Administration Ft. Worth, TX ii ENSTROM 480B OPERATOR'S MANUAL FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 LOG OF REVISIONS REV NO FAA APPROVAL SUMMARY DESCRIPTION 25 General updates FTP, AIR-712, for 18 Mar 2025 Manager, Flight Test & Human Factors Branch, AIR-710 Federal Aviation Administration Approved Date NOTE All revisions are indicated by a black vertical line. ENSTROM 480B OPERATOR'S MANUAL iii FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 EASA LOG OF REVISIONS Rev. No. Date EASA Approved 1 Sep 28/03 * 2 Sep 28/03 * 3 May 29/05 2005-4677 4 May 30/05 2005-4682 5 May 29/05 2005-4678 6 Jun 1/05 Decision 2004/04/CF 7 Jun 6/06 Decision 2004/04/CF 8 Sep 17/06 Decision 2004/04/CF 9 Aug 2/07 EASA.IM.R.C.01427 10 Jan 18/08 EASA.IM.R.C.01426 11 Apr 17/08 EASA.IM.R.C.01442 12 NOT EASA APPROVED (SUPP. #10, EFIS) 13 NOT EASA APPROVED (SUPP. #10, EFIS) 14 Apr 4/13 EASA 10044309 15 Mar 7/13 EASA 10043956 16 Jan 27/14 EASA 10045751 17 Aug 28/13 FAA/EASA T.I.P.; FAA Approved on Behalf of EASA by G. J. Michalik♦ 18 May 8/14 EASA 10044744 19 Aug 28/13 FAA/EASA T.I.P.; FAA Approved on Behalf of EASA by G. J. Michalik♦ 20 Oct 10/13 FAA/EASA T.I.P.; FAA Approved on Behalf of EASA by G. J. Michalik▲ 21 Jan 27/14 EASA 10045751 22 May 1/17 FAA/EASA T.I.P.; FAA Approved on Behalf of EASA by M. Javed● 23 May 1/17 FAA/EASA T.I.P.; FAA Approved on Behalf of EASA by M. Javed● 24 Jul 11/19 FAA/EASA T.I.P.; FAA Approved on Behalf of EASA by M. Javed◊ 25 Mar 18/25 FAA/EASA T.I.P.; EASA Approved▼ iv ENSTROM 480B OPERATOR'S MANUAL FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 *Article 3, Commission Regulation (EU) 748/2012 ♦ T.I.P. Section 3.2.11 ▲ T.I.P., Rev. 3 dated April 23, 2013, Section 3.2.11 ● T.I.P., Rev. 5 dated September 15, 2015, Section 3.2.11 ◊ T.I.P., Rev. 6 dated September 22, 2017, Section 3.5.12 ▼ T.I.P., Rev. 7 dated October 19, 2023, Sections 3.3 and 3.5.12.4 ENSTROM 480B OPERATOR'S MANUAL v FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 LOG OF SUPPLEMENTS Sup. No. Description Date FAA Approved 1 Cargo Hook Feb 9/01 Joseph C. Miess 2 Snow Shoes Feb 9/01 Joseph C. Miess 3 External Fuel Filter Feb 9/01 Joseph C. Miess 4 Baggage Box Extension Feb 9/01 Joseph C. Miess 5 Camera Door Feb 9/01 Joseph C. Miess 6 Emergency Floats Sep 5/03 Joseph C. Miess 7 Air Conditioning Sep 9/04 Joseph C. Miess 8 Nose Positioned Camera Mount Jun 6/06 Joseph C. Miess 9 Searchlight Jun 6/06 Joseph C. Miess 10 EFIS Feb 14/08 Joseph C. Miess APPROVED FOR THE MANAGER CHICAGO AIRCRAFT CERTIFICATION OFFICE CENTRAL REGION FEDERAL AVIATION ADMINISTRATION

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vi ENSTROM 480B OPERATOR'S MANUAL FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 EASA LOG OF SUPPLEMENTS Sup. No. Description Date EASA Approved FAA Approval on Behalf of EASA 1 Cargo Hook Sep 28/03 * N/A 2 Snow Shoes Sep 28/03 * N/A 3 External Fuel Filter Sep 28/03 * N/A 4 Baggage Box Extension Sep 28/03 * N/A 5 Camera Door Sep 28/03 * N/A 6 Emergency Floats May 29/05 2005-4677 N/A 7 Air Conditioning May 30/05 2005-4682 N/A 8 Nose Positioned Camera Mount Jun 6/06 Decision 2004/04/CF N/A 9 Searchlight Jun 6/06 Decision 2004/04/CF N/A 10 EFIS NOT APPROVED * Article 3, Commission Regulation (EU) 748/2012 ENSTROM 480B OPERATOR'S MANUAL vii FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 TABLE OF CONTENTS SECTION DESCRIPTION PAGE Manual Cover Log of Revisions .................................... i EASA Log of Revisions ......................... iii Log of Supplements .............................. v EASA Log of Supplements .................... vi Table of Contents ............................... vii Log of Page Effectivity .......................... ix INTRODUCTION ....................... INTRO-1 CHAPTER 1 OPERATING LIMITATIONS ................ 1-1 CHAPTER 2 NORMAL PROCEDURES ................... 2-1 CHAPTER 3 EMERGENCY PROCEDURES ............ 3-1 CHAPTER 4 PERFORMANCE DATA...................... 4-1 CHAPTER 5 OPTIONAL EQUIPMENT SUPPLEMENTS ............................. 5-0-1 CHAPTER 6 WEIGHT/BALANCE AND LOADING .. 6-1 CHAPTER 7 HELICOPTER AND SYSTEMS DESCRIPTION AND OPERATION ...... 7-1 CHAPTER 8 HANDLING, SERVICING, AND MAINTENANCE ................................ 8-1 CHAPTER 9 SUPPLEMENTAL INFORMATION ....... 9-1 CHAPTER 10 ABBREVIATED CHECKLIST............ 10-1 viii ENSTROM 480B OPERATOR'S MANUAL FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 INTENTIONALLY LEFT BLANK ENSTROM 480B OPERATOR'S MANUAL ix FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 LIST OF EFFECTIVE PAGES PAGE DATE PAGE DATE i May 2/19 ii 27 Jan 2025 iii 27 Jan 2025 iv 27 Jan 2025 v 27 Jan 2025 vi 27 Jan 2025 vii 27 Jan 2025 viii 27 Jan 2025 ix 27 Jan 2025 x 27 Jan 2025 xi 27 Jan 2025 xii 27 Jan 2025 xiii 27 Jan 2025 xiv 27 Jan 2025 xv 27 Jan 2025 xvi 27 Jan 2025 INTRO-1 27 Jan 2025 INTRO-2 Feb 9/01 INTRO-3 May 2/19 INTRO-4 May 2/19 INTRO-5 May 2/19 INTRO-6 27 Jan 2025 INTRO-7 27 Jan 2025 INTRO-8 27 Jan 2025 INTRO-9 27 Jan 2025 INTRO-10 Apr 10/02 1-1 27 Jan 2025 1-2 27 Jan 2025 1-3 May 2/19 1-4 May 2/19 1-5 Feb 9/01 1-6 Apr 16/10 1-7 Apr 16/10 1-8 27 Jan 2025 1-9 27 Jan 2025 1-10 27 Jan 2025 1-11 Apr 28/16 1-12 Apr 16/10 1-13 Apr 28/16 1-14 Apr 10/02 1-15 Apr 10/02 1-16 Apr 10/02 1-16.1 Jul 12/10 1-16.2 May 2/19 1-17 Jun 30/04 1-18 Jun 30/04 1-19 Jun 30/04 1-20 Jun 30/04 1-21 Jun 30/04 1-22 Jun 30/04 1-23 Jul 3/12 1-24 27 Jan 2025 1-25 Jul 3/12 1-26 27 Jan 2025 1-27 Feb 9/01 1-28 Feb 9/01 1-29 Feb 9/01 1-30 Feb 9/01 1-31 Feb 9/01 1-32 Feb 9/01 1-33 Nov 21/12 1-34 Nov 21/12 2-1 27 Jan 2025 2-2 27 Jan 2025 2-3 Apr 16/10 2-4 Jul 3/12 2-5 Jul 3/12 2-6 Jul 3/12 2-7 Jul 3/12 2-8 Jul 3/12 2-9 Apr 16/10 2-10 Jul 3/12 2-11 Jul 3/12 x ENSTROM 480B OPERATOR'S MANUAL LIST OF EFFECTIVE PAGES FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 PAGE DATE 2-12 Jul 3/12 2-13 Apr 16/10 2-14 Apr 28/16 2-15 Apr 28/16 2-16 May 2/19 2-17 May 2/19 2-18 Apr 16/10 2-19 Jun 14/11 2-20 Apr 16/10 2-21 27 Jan 2025 2-22 27 Jan 2025 2-23 Apr 16/10 2-24 Apr 16/10 2-25 Apr 16/10 2-26 Apr 16/10 2-27 Apr 16/10 2-28 Apr 16/10 2-29 Apr 16/10 2-30 Apr 28/16 2-31 Apr 16/10 2-32 27 Jan 2025 2-33 Apr 16/10 2-34 Apr 16/10 2-35 Apr 16/10 2-36 Apr 16/10 2-37 Apr 16/10 2-38 Apr 16/10 2-39 Apr 16/10 2-40 Apr 16/10 2-41 Apr 16/10 2-42 Apr 16/10 2-43 Apr 16/10 2-44 Apr 16/10 3-1 27 Jan 2025 3-2 27 Jan 2025 3-3 27 Jan 2025 3-4 Feb 9/01 PAGE DATE 3-5 Feb 9/01 3-6 Feb 9/01 3-7 Feb 9/01 3-8 Feb 9/01 3-9 Feb 9/01 3-10 Feb 9/01 3-11 Feb 9/01 3-12 Feb 9/01 3-13 Feb 2/04 3-14 Feb 2/04 3-15 Feb 9/01 3-16 Feb 9/01 3-17 Feb 9/01 3-18 Feb 9/01 3-19 Feb 2/04 3-20 Feb 2/04 3-21 Apr 10/02 3-22 Apr 10/02 3-23 Apr 16/10 3-24 Sep 5/03 3-25 Apr 16/10 3-26 Feb 9/01 3-27 Feb 9/01 3-28 Feb 9/01 3-29 Feb 9/01 3-30 Feb 9/01 3-31 Apr 10/02 3-32 Apr 10/02 3-33 Apr 10/02 3-34 Apr 10/02 3-35 Apr 10/02 3-36 Apr 10/02 3-37 Mar 17/05 3-38 Jul 16/15 3-39 Jul 12/10 3-40 Jul 12/10 3-41 Jul 12/10 ENSTROM 480B OPERATOR'S MANUAL xi LIST OF EFFECTIVE PAGES FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 PAGE DATE 3-42 Nov 21/12 3-43 Nov 21/12 3-44 Nov 21/12 4-1 27 Jan 2025 4-2 27 Jan 2025 4-3 27 Jan 2025 4-4 May 22/06 4-5 Feb 9/01 4-6 Feb 9/01 4-7 Feb 9/01 4-8 Feb 9/01 4-9 Feb 9/01 4-10 Feb 9/01 4-11 May 22/06 4-12 May 22/06 4-13 May 22/06 4-14 May 22/06 4-15 27 Jan 2025 4-16 Feb 9/01 4-17 Apr 11/07 4-18 Apr 11/07 4-19 Feb 2/04 4-20 Feb 2/04 4-21 Apr 11/07 4-22 Apr 11/07 4-23 Feb 9/01 4-24 Feb 9/01 4-25 Feb 9/01 4-26 Feb 9/01 4-27 Nov 21/12 4-28 Feb 9/01 4-29 Feb 9/01 4-30 Feb 9/01 4-31 Feb 9/01 4-32 Feb 9/01 4-33 Feb 9/01 4-34 Feb 9/01 PAGE DATE 4-35 Feb 9/01 4-36 Feb 9/01 4-37 Feb 9/01 4-38 Feb 9/01 4-39 Feb 2/04 4-40 Feb 2/04 4-41 Feb 9/01 4-42 Feb 9/01 4-43 Feb 9/01 4-44 Feb 9/01 4-45 Feb 9/01 4-46 Feb 9/01 5-0-1 Feb 1/08 5-0-2 Feb 1/08 5-1-1 27 Jan 2025 5-1-2 27 Jan 2025 5-1-3 Apr 16/10 5-1-4 Feb 2/04 5-1-5 Feb 9/01 5-1-6 Feb 9/01 5-1-7 Jul 16/15 5-1-8 Jul 16/15 5-1-9 Feb 9/01 5-1-10 Feb 9/01 5-1-11 Feb 9/01 5-1-12 Feb 9/01 5-1-13 Feb 2/04 5-1-14 Feb 2/04 5-2-1 27 Jan 2025 5-2-2 Sep 5/07 5-2-3 Sep 5/07 5-2-4 Sep 5/07 5-2-5 Feb 9/01 5-2-6 Feb 9/01 5-2-7 Feb 9/01 5-2-8 Feb 9/01 5-2-9 Feb 2/04 xii ENSTROM 480B OPERATOR'S MANUAL LIST OF EFFECTIVE PAGES FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 PAGE DATE 5-2-10 Feb 2/04 5-3-1 27 Jan 2025 5-3-2 Feb 9/01 5-3-3 Feb 9/01 5-3-4 Feb 9/01 5-3-5 Feb 9/01 5-3-6 Feb 9/01 5-3-7 Feb 9/01 5-3-8 Feb 9/01 5-3-9 Feb 9/01 5-3-10 Feb 9/01 5-4-1 27 Jan 2025 5-4-2 Feb 9/01 5-4-3 Feb 2/04 5-4-4 Jul 16/15 5-4-5 Feb 9/01 5-4-6 Feb 9/01 5-4-7 Feb 9/01 5-4-8 Feb 9/01 5-4-9 Feb 9/01 5-4-10 Feb 9/01 5-5-1 27 Jan 2025 5-5-2 Sep 5/07 5-5-3 Sep 5/07 5-5-4 Sep 5/07 5-5-5 Feb 2/04 5-5-6 Feb 2/04 5-5-7 Feb 9/01 5-5-8 Feb 9/01 5-5-9 Feb 9/01 5-5-10 Feb 9/01 5-6-1 27 Jan 2025 5-6-2 27 Jan 2025 5-6-3 Apr 28/16 5-6-4 May 22/06 5-6-5 May 22/06 5-6-6 May 22/06 PAGE DATE 5-6-7 May 22/06 5-6-8 May 22/06 5-6-9 May 22/06 5-6-10 Jul 16/15 5-7-1 27 Jan 2025 5-7-2 27 Jan 2025 5-7-3 Apr 16/10 5-7-4 Apr 16/10 5-7-5 Apr 16/10 5-7-6 Apr 16/10 5-7-7 Apr 16/10 5-7-8 Apr 16/10 5-7-9 Jun 30/04 5-7-10 Jun 30/04 5-7-11 Apr 16/10 5-7-12 Apr 16/10 5-7-13 Apr 16/10 5-7-14 Apr 16/10 5-7-15 Apr 16/10 5-7-16 Apr 16/10 5-7-17 Apr 16/10 5-7-18 Apr 16/10 5-8-1 27 Jan 2025 5-8-2 May 22/06 5-8-3 May 22/06 5-8-4 Apr 16/10 5-8-5 May 22/06 5-8-6 May 22/06 5-8-7 May 22/06 5-8-8 May 22/06 5-8-9 May 22/06 5-8-10 May 22/06 5-9-1 27 Jan 2025 5-9-2 27 Jan 2025 5-9-3 27 Jan 2025 5-9-4 May 22/06 5-9-5 May 22/06 ENSTROM 480B OPERATOR'S MANUAL xiii LIST OF EFFECTIVE PAGES FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 PAGE DATE 5-9-6 May 22/06 5-9-7 May 22/06 5-9-8 May 22/06 5-9-9 May 22/06 5-9-10 May 22/06 5-9-11 May 22/06 5-9-12 May 2/19 5-9-13 May 2/19 5-9-14 May 22/06 5-10-1 27 Jan 2025 5-10-2 27 Jan 2025 5-10-3 Apr 22/08 5-10-4 Apr 22/08 5-10-5 Feb 1/08 5-10-6 Feb 1/08 5-10-7 Feb 1/08 5-10-8 Feb 1/08 5-10-9 Feb 1/08 5-10-10 Apr 22/08 5-10-11 Jan 25/11 5-10-12 Feb 1/08 5-10-13 Feb 1/08 5-10-14 Feb 1/08 5-10-15 Feb 1/08 5-10-16 Feb 1/08 5-10-17 Apr 22/08 5-10-18 Feb 1/08 5-10-19 Feb 1/08 5-10-20 Feb 1/08 5-10-21 Apr 22/08 5-10-22 Apr 16/10 5-10-23 Feb 1/08 5-10-24 Feb 1/08 5-10-25 Feb 1/08 5-10-26 Jan 25/11 5-10-27 Jan 25/11 5-10-28 Jan 25/11 PAGE DATE 6-1 27 Jan 2025 6-2 27 Jan 2025 6-3 Feb 9/01 6-4 Feb 9/01 6-5 Apr 10/02 6-6 Jul 3/12 6-7 Jul 3/12 6-8 Jul 3/12 6-9 Nov 21/12 6-10 Feb 9/01 6-11 Feb 9/01 6-12 Feb 9/01 6-13 Nov 21/12 6-14 Apr 28/16 6-15 Nov 21/12 6-16 Feb 9/01 6-17 Feb 9/01 6-18 27 Jan 2025 6-19 Feb 9/01 6-20 Jun 14/11 6-21 Feb 9/01 6-22 Feb 9/01 6-23 Feb 9/01 6-24 Feb 9/01 6-25 Apr 10/02 6-26 Jun 14/11 7-1 27 Jan 2025 7-2 27 Jan 2025 7-3 27 Jan 2025 7-4 27 Jan 2025 7-4.1 27 Jan 2025 7-4.2 Apr 10/02 7-5 Feb 9/01 7-6 Feb 9/01 7-7 Feb 9/01 7-8 Feb 9/01 7-9 Apr 16/10 xiv ENSTROM 480B OPERATOR'S MANUAL LIST OF EFFECTIVE PAGES FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 PAGE DATE 7-10 Apr 16/10 7-11 Sep 8/04 7-12 Jan 25/11 7-12.1 Jan 25/11 7-12.2 Jan 25/11 7-12.3 Jan 25/11 7-12.4 Jan 25/11 7-13 Jul 12/10 7-14 Jul 12/10 7-15 Jul 12/10 7-15.1 Jul 3/12 7-15.2 Jul 12/10 7-16 Nov 21/12 7-17 Nov 21/12 7-18 Feb 9/01 7-19 27 Jan 2025 7-20 Apr 11/07 7-21 Feb 9/01 7-22 Jan 25/11 7-23 Jan 25/11 7-24 Jan 25/11 7-25 27 Jan 2025 7-26 27 Jan 2025 7-27 Jan 25/11 7-28 Jan 25/11 7-28.1 Jan 25/11 7-28.2 27 Jan 2025 7-29 Nov 21/12 7-30 Feb 9/01 7-31 27 Jan 2025 7-32 27 Jan 2025 7-33 Jan 25/11 7-34 Jan 25/11 7-35 Jan 25/11 7-36 Feb 9/01 7-37 Jul 3/12 7-38 Jul 3/12 PAGE DATE 7-39 Feb 9/01 7-40 Feb 9/01 7-41 Feb 9/01 7-42 Feb 9/01 7-43 Apr 10/02 7-44 Apr 10/02 7-45 Feb 9/01 7-46 Feb 9/01 7-47 Feb 9/01 7-48 Jun 14/11 7-49 Jun 14/11 7-50 27 Jan 2025 7-51 Apr 16/10 7-52 Apr 16/10 7-53 Apr 16/10 7-54 27 Jan 2025 7-55 Apr 10/02 7-56 Nov 21/12 7-57 Jul 3/12 7-58 Jul 12/10 7-59 Jul 12/10 7-60 27 Jan 2025 7-61 May 2/19 7-62 Apr 10/02 7-62.1 Jan 25/11 7-62.2 Jul 12/10 7-63 Jul 12/10 7-64 Jul 12/10 7-65 Jun 14/11 7-66 Feb 9/01 7-67 Aug 29/11 7-68 Apr 28/16 7-69 27 Jan 2025 7-70 27 Jan 2025 7-70.1 27 Jan 2025 7-70.2 27 Jan 2025 7-71 Jan 25/11 ENSTROM 480B OPERATOR'S MANUAL xv LIST OF EFFECTIVE PAGES FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 PAGE DATE 7-72 27 Jan 2025 7-73 Jul 16/15 7-74 Jul 12/10 7-75 Jul 12/10 7-76 May 2/19 8-1 27 Jan 2025 8-2 27 Jan 2025 8-3 Sep 5/03 8-4 27 Jan 2025 8-5 27 Jan 2025 8-6 Aug 10/10 8-7 27 Jan 2025 8-8 Feb 9/01 8-9 Feb 9/01 8-10 Feb 9/01 8-11 27 Jan 2025 8-12 Jun 14/11 8-12.1 Jun 14/11 8-12.2 Jun 14/11 8-13 Jul 3/12 8-14 Aug 11/06 8-15 Jun 14/11 8-16 Aug 11/06 8-17 Feb 9/01 8-18 Feb 9/01 8-19 27 Jan 2025 8-20 27 Jan 2025 8-21 27 Jan 2025 8-22 27 Jan 2025 8-23 27 Jan 2025 8-24 27 Jan 2025 8-25 Apr 16/10 8-26 Apr 16/10 8-27 Feb 9/01 8-28 27 Jan 2025 8-29 27 Jan 2025 8-30 27 Jan 2025 PAGE DATE 9-1 27 Jan 2025 9-2 Sep 8/04 9-3 Feb 9/01 9-4 27 Jan 2025 9-5 Feb 9/01 9-6 27 Jan 2025 9-7 27 Jan 2025 9-8 27 Jan 2025 10-1 27 Jan 2025 10-2 Apr 16/10 10-3 Apr 16/10 10-4 Apr 16/10 10-5 Apr 16/10 10-6 Apr 16/10 10-7 Apr 28/16 10-8 Apr 16/10 10-9 Apr 16/10 10-10 Apr 16/10 10-11 Apr 16/10 10-12 Apr 16/10 10-13 Apr 28/16 10-14 Apr 28/16 10-15 27 Jan 2025 10-16 Apr 16/10 10-17 Apr 28/16 10-18 Apr 28/16 10-19 Apr 16/10 10-20 Apr 16/10 10-21 Apr 16/10 10-22 Apr 16/10 10-23 Apr 16/10 10-24 Apr 16/10 10-25 Apr 16/10 10-26 Apr 16/10 10-27 Apr 16/10 10-28 Apr 16/10 10-29 Apr 16/10 xvi ENSTROM 480B OPERATOR'S MANUAL LIST OF EFFECTIVE PAGES FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 PAGE DATE 10-30 Apr 16/10 10-31 Apr 16/10 10-32 Apr 28/16 10-33 Apr 28/16 10-34 Apr 28/16 10-35 Apr 28/16 10-36 Apr 28/16 ENSTROM 480B OPERATOR’S MANUAL INTRO-1 FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 INTRODUCTION TABLE OF CONTENTS PARAGRAPH DESCRIPTION PAGE Table of Contents .......................... INTRO-1 INTRO-1 General......................................... INTRO-3 INTRO-2 Warnings, Cautions, and Notes ..... INTRO-3 INTRO-3 Descriptions ................................. INTRO-4 INTRO-4 Table of Contents .......................... INTRO-4 INTRO-5 Reporting of Errors ....................... INTRO-4 INTRO-6 Explanation of Change Symbols .... INTRO-4 INTRO-7 Use of Words Shall, Should, and May ....................................... INTRO-5 INTRO-8 Definitions of Abbreviations........... INTRO-6 LIST OF TABLES TABLE NO. DESCRIPTION PAGE INTRO-1 List of Abbreviations ..................... INTRO-6 INTRO-2 ENSTROM 480B OPERATOR’S MANUAL Report No. 28-AC-023 Feb 9/01 INTENTIONALLY LEFT BLANK ENSTROM 480B OPERATOR’S MANUAL INTRO-5 Rev. 24 Report No. 28-AC-023 May 2/19 1. Indexes, figures, and tabular data where the change cannot be readily identified. 2. Blank space resulting from the deletion of text, illustration, or a table. 3. Correction of minor errors, such as spelling, punctuation, relocation of material, etc. unless such correction changes the meaning of the material. INTRO-7. Use of Words, Shall, Should, and May Within this technical manual, the word "shall" is used to indicate a mandatory requirement. The word "should" is used to indicate a nonmandatory but preferred method of accomplishment. The word "may" is used to indicate an acceptable method of accomplishment. INTRO-6 ENSTROM 480B OPERATOR’S MANUAL Not FAA Approved Rev. 25 Report No. 28-AC-023 27 Jan 2025 INTRO-8. Definitions of Abbreviations Table INTRO-1 provides definitions for abbreviations used in this manual. The same abbreviation applies for either singular or plural applications. Table INTRO-1. List of abbreviations ABBREVIATION DEFINITION ABS Absolute AGL Above Ground Level AH Amp Hour ALT Altitude B.L. Butt Line C Celsius CAS Calibrated Airspeed CG Center of Gravity C.L. Center Line CONF Configuration CONT Continuous END Endurance F Fahrenheit FAA Federal Aviation Administration FLT Flight FPM Feet per Minute F.S. Fuselage Station FSII Fuel System Icing Inhibitor FT Foot ENSTROM 480B OPERATOR’S MANUAL INTRO-7 Not FAA Approved Rev. 25 Report No. 28-AC-023 27 Jan 2025 TABLE INTRO-1. LIST OF ABBREVIATIONS FT/MIN Feet per Minute FWD Forward GAL Gallon GAL/HR Gallon per Hour GW Gross Weight HR Hour Hz Hertz (Cycles per Second) IAS Indicated Airspeed IGE In Ground Effect IN Inch IN-LB Inch-Pound (Force) IN HG Inches of Mercury ISA International Standard Atmosphere KCAS Knots Calibrated Airspeed KIAS Knots Indicated Airspeed KTAS Knots True Airspeed km Kilometer KT Knot l or L Liter LB Pound LB/HR Pound per Hour MAX Maximum MB Millibars ml or mL Milliliter INTRO-8 ENSTROM 480B OPERATOR’S MANUAL Not FAA Approved Rev. 25 Report No. 28-AC-023 27 Jan 2025 TABLE INTRO-1. LIST OF ABBREVIATIONS MIN Minimum MIN Minute N1 Gas Producer Turbine Speed N2 Power Turbine Speed NICAD Nickel Cadmium NO. Number NM Nautical Mile Nm Newton Meter OAT Outside Air Temperature OGE Out of Ground Effect OZ Ounce PT Pint PRESS Pressure PSI Pounds per Square Inch PSIG Pounds per Square Inch Gauge R/C Rate of Climb R/D Rate of Decent REV. Revision RFM Rotorcraft Flight Manual RPM Revolutions per Minute SHP Shaft Horsepower SPEC Specification STA Station SQ FT Square Feet ENSTROM 480B OPERATOR’S MANUAL INTRO-9 Not FAA Approved Rev. 25 Report No. 28-AC-023 27 Jan 2025 TABLE INTRO-1. LIST OF ABBREVIATIONS SUP. Supplement TAS True Airspeed TEMP Temperature TOT Turbine Outlet Temperature TRQ Torque VD Maximum Design Dive Speed VDC Volts, Direct Current VH Maximum Level Flight Airspeed at Maximum Continuous Power VNE Velocity Never Exceed (Airspeed Limitation) VY Best Rate of Climb Airspeed WT Weight XMSN Transmission INTRO-10 ENSTROM 480B OPERATOR’S MANUAL Rev. 1 Report No. 28-AC-023 Apr 10/02 INTENTIONALLY LEFT BLANK ENSTROM 480B OPERATOR'S MANUAL 1-1 FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 CHAPTER 1. OPERATING LIMITATIONS TABLE OF CONTENTS SECTION DESCRIPTION PAGE Table of Contents ....................... 1-1 Section I Introduction .............................. 1-3 Paragraph 1-1 Purpose ..................................... 1-3 1-2 General ..................................... 1-3 1-3 Operational Limits ..................... 1-3 Section II General ..................................... 1-3 Paragraph 1-4 Kinds of Operation ..................... 1-3 1-5 Minimum Crew Requirements .... 1-4 Section III Helicopter & System Limits ........ 1-5 Paragraph 1-6 Instrument Markings ................. 1-5 1-7 Rotor Limitations ....................... 1-5 1-8 Transmission Limits .................. 1-5 1-9 Engine Limits ............................ 1-6 1-10 Starter Limits ............................ 1-9 Section IV Operation Limits ...................... 1-17 Paragraph 1-11 Airspeed Limits ........................ 1-17 1-12 Altitude Limits ......................... 1-18 1-13 Load Limits.............................. 1-23 1-14 Maneuvers ............................... 1-23 1-15 Environmental ......................... 1-24 1-16 Restrictions in Use of Anti-torque Pedals ................... 1-25 1-17 Placards .................................. 1-25 LIST OF FIGURES FIGURE NO. DESCRIPTION PAGE 1-1 Instrument Markings .......................... 1-11 1-2 Maximum Allowable Torque and N2 ...1-16.2 1-3 Airspeed Operating Limits ................... 1-19 1-4 VNE Envelopes ..................................... 1-22 1-5 VNE Placards ....................................... 1-27 1-2 ENSTROM 480B OPERATOR'S MANUAL FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 LIST OF TABLES TABLE NO. DESCRIPTION PAGE 1-1 Kinds of Operation Equipment List ........ 1-4 ENSTROM 480B OPERATOR'S MANUAL 1-7 FAA Approved: Apr 16/10 Rev. 14 Report No. 28-AC-023 Apr 16/10 Gas Producer Turbine (N 1 ) 105% Continuous 106% for 15 seconds Power Turbine (N2 ) See Figure 1-2 3. Engine Starting a. Start Cycle Time. The minimum time between ground starting attempts is 30 seconds. b. Minimum Oil Temperature. The minimum oil temperature for starting is -54°C for MIL-PRF- 7808 series oil and -40°C for MIL-PRF-23699 series oil. c. Oil Pressure During Start. A positive indication of oil pressure must be obtained when 59% N1 is reached and must stabilize at least at 50 PSI at idle. CAUTION Following starts in very cold ambient conditions, the oil pressure may exceed 130 PSI immediately after start up to a maximum of 150 PSI. The engine must not be accelerated from idle until the oil pressure has returned within the specified limits. 4. Ambient Temperature and Altitude Limits. The ambient temperature limits for the engine are -54°C from sea level to 20,000 feet pressure altitude, and up to +54°C from sea level to 6,000 feet then decreasing linearly to 27°C at 20,000 feet pressure altitude using primary fuels. NOTE The maximum operating altitude for the 480B is 13,000 feet density altitude (Refer to paragraph 1-12). 1-8 ENSTROM 480B OPERATOR'S MANUAL FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 5. Fuel Operational Limits a. Fuels shall conform to MIL-DTL-5624 (formerly MIL-T-5624) Grade JP-4 or JP-5, MIL-DTL-83133 (formerly MIL-G-83133) Grade JP-8, ASTM D1655 Jet A or A-1, or ASTM D6615 Jet B. b. [Deleted] c. At ambient temperatures below 4°C (40°F), all fuels used shall contain a fuel system icing inhibitor (FSII) additive conforming to MIL-DTL- 85470. FSII shall be added to all commercial fuel, not already containing a FSII additive, during refueling operations. CAUTION Avoid using FSII additives packaged in aerosol cans. Failure to exactly follow the additive mixing procedures during refueling can result in incorrect additive concentrations, fuel system contamination, and possible engine stoppage. 6. Lubrication System Limits a. Oil Specification. Approved oils for the engine are MIL-PRF-23699 (Formerly MIL-L-23699) or MIL- PRF-7808 (Formerly MIL-L-7808). b. Oil Pressure Limits 94.2% N1 and above 115-130 PSI 78.5%- 94.2% N1 90-130 PSI Below 78.5% N1 50-130 PSI ENSTROM 480B OPERATOR'S MANUAL 1-9 FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 1-10. Starter Limits 1. Starter limits are as follows: a. If no TOT within the first 20 seconds: EXTERNAL POWER BATTERY POWER 25 seconds ON 40 seconds ON 30 seconds OFF 60 seconds OFF 25 seconds ON 40 seconds ON 30 seconds OFF 60 seconds OFF 25 seconds ON 40 seconds ON 30 minutes OFF 30 minutes OFF b. If rise in TOT occurs during the first 20 seconds: EXTERNAL OR BATTERY POWER 1 minute ON 1 minute OFF 1 minute ON 1 minute OFF 1 minute ON 30 minutes OFF NOTE Below 40°F (4°C) the starter engage time limits do not apply. 1-10 ENSTROM 480B OPERATOR'S MANUAL FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 INTENTIONALLY LEFT BLANK ENSTROM 480B OPERATOR'S MANUAL 1-23 FAA Approved: Jul 3/12 Rev. 20 Report No. 28-AC-023 Jul 3/12 1-13. Load Limits 1. Weight. The maximum gross weight of the helicopter is 3,000 pounds when operating at density altitudes from sea level up to 10,000 feet. The maximum gross weight of the helicopter is 2,850 pounds when operating at density altitudes from 10,000 feet to 13,000 feet. 2. Center of Gravity. The Center of Gravity Limitations Chart is presented in Chapter 6. Weight/ Balance and Loading. The limitations are as follows: a. AFT CG is 140.9 in. at 3,000 pounds gross weight expanding linearly to 143.0 in. for all weights at and below 2,500 pounds. b. FWD CG is 134.0 in. for all weights up to 2,200 pounds and decreasing linearly to 136.9 in. at 3,000 pounds gross weight. 3. Lateral Center of Gravity. The lateral center of gravity is expressed in terms of lateral offset moment. The lateral offset moment limits are ±7500 in-lbs. 4. The maximum allowable weight in the baggage box is 150 pounds. 5. The maximum allowable weight on the optional baggage shelf behind the pilot's seat is 50 pounds. 1-14. Maneuvers 1. Aerobatics. Aerobatic maneuvers, (over 90 degrees in pitch or roll), are prohibited. CAUTION The engine is approved for operation at 90 degrees pitch up and down and zero (0) g for 10 seconds only. Dwelling at these conditions longer than 10 seconds can damage the engine. 1-24 ENSTROM 480B OPERATOR'S MANUAL FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 1-15. Environmental 1. Ambient Temperature. The maximum operational temperature is 106°F (41°C) at sea level to 59°F (15°C) at 13,000 ft. The minimum operational ambient temperature is -25°F (-32°C). NOTE For aircraft serial number 5114 and sub- sequent, the maximum ambient temperature limit is 122°F (50°C) at sea level to 75°F (24°C) at 13,000 ft if the aircraft is equipped with Engine Access Panels, P/N 4220150 (screened panels). For aircraft serial numbers 5087 through 5113, the maximum ambient temperature limit is 122°F (50°C) at sea level to 75°F (24°C) at 13,000 ft if the aircraft is equipped with the Increased Cooling Kit, P/N 4230031. 2. All de-ice and anti-ice systems, including the scavenge air for the particle separators and engine anti-ice, must be turned on when flying in the presence of visible moisture at outside temperatures of 40°F (4°C) or below and always during flight at night when the outside air temperature is 40°F (4°C) or below. 3. Falling or Blowing Snow. Flight in falling and blowing snow is authorized provided the following conditions are met: a. Particle Separator scavenge air is ON continuously. b. Engine Anti-Ice is ON continuously. c. Prior to initial takeoff and each subsequent takeoff, the helicopter air and oil cooler inlets are inspected for possible accumulations of snow, slush, or ice and all accumulations are removed from the exterior of the particle separator and the cabin surface adjacent to and ahead of the inlet. ENSTROM 480B OPERATOR'S MANUAL 1-25 FAA Approved: Jul 3/12 Rev. 20 Report No. 28-AC-023 Jul 3/12 d. Prior to initial takeoff and each subsequent takeoff, the plastic particle separator ejector tubes on the aft end of the upper plenum are inspected for obstructions and snow and all such obstructions removed. CAUTION Restrict hover operations in heavy snow conditions (1/2 mile/.8 km visibility or less) to 10 minutes or less per flight. 1-16. Restrictions in Use of Anti-torque Pedals 1. Avoid rapid pedal reversals (hard kicks) both on the ground and in flight. 1-17. Placards 1. Placards that are to be placed in view of the pilot are: THIS HELICOPTER MUST BE OPERATED IN COMPLIANCE WITH THE OPERATING LIMITATIONS SPECIFIED IN THE FAA APPROVED ROTORCRAFT FLIGHT MANUAL (and) THIS HELICOPTER IS APPROVED FOR OPERATIONS UNDER DAY AND NIGHT VFR- NON-ICING CONDITIONS ONLY 1-26 ENSTROM 480B OPERATOR'S MANUAL FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 2. Beneath the fuel filler port on the left side of the aircraft: CAP. 90 U.S. GAL JP-4/JET-A USE MIL-DTL-5624 / ASTM D1655 AT TEMPERATURES BELOW 4°C (40°F) FUEL MUST CONTAIN MIL-DTL-85470 FUEL ADDITIVE (SEE RFM TABLE 8-2 FOR APPROVED ALTERNATE FUELS) 3. VNE Placards: (See Figure 1-5 for the VNE Placards. The placards are located overhead above the center of the forward wind screen or on top of the instrument panel). 4. Placards located inside the baggage compartment door: MAX ALLOWABLE CARGO 150 LBS (and) OBSERVE C.G. AND GROSS WEIGHT LIMITATIONS 5. Placard on baggage shelf behind pilot’s seat: MAX. LOADING – 50 LBS. (and) BAGGAGE MUST BE SECURED PRIOR TO TAKEOFF AND LANDING ENSTROM 480B OPERATOR'S MANUAL 2-1 FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 CHAPTER 2. NORMAL PROCEDURES TABLE OF CONTENTS SECTION DESCRIPTION PAGE Table of Contents ....................... 2-1 Section I Flight Planning .......................... 2-3 Paragraph 2-1 Flight Planning .......................... 2-3 2-2 Operating Limits ........................ 2-3 2-3 Weight, Balance and Loading ..... 2-3 2-4 Performance .............................. 2-3 Section II Operating Procedures and Maneuvers ................................. 2-4 Paragraph 2-5 General ..................................... 2-4 2-6 Checklist ................................... 2-4 2-7 Checks ...................................... 2-4 2-8 Before Preflight Check ................ 2-4 2-8.1 Preflight Check – Fuel Management ...................... 2-5 2-9 Preflight Check – Exterior Check 2-6 2-10 Cabin Left Side ....................... 2-6 2-11 Aft Fuselage Left Side ............. 2-7 2-12 Tailcone Left Side ................... 2-9 2-13 Tailcone Right Side ................. 2-9 2-14 Aft Fuselage Right Side ......... 2-10 2-15 Fuselage Top Area ................ 2-12 2-16 Cabin Right Side .................. 2-12 2-17 Cabin Left Side ..................... 2-13 2-18 Before Starting Engine ............. 2-13 2-19 Starting Engine........................ 2-16 2-20 Engine Runup ......................... 2-19 2-21 Takeoff to Hover ....................... 2-20 2-22 Hovering Turns ........................ 2-20 2-23 Sideward and Rearward Hovering Flight ........................ 2-21 2-24 Hover Taxi ............................... 2-21 2-25 Cyclic Trim .............................. 2-21 2-26 Hover Check ............................ 2-21 2-27 Before Takeoff .......................... 2-22 2-28 Normal Takeoff ........................ 2-23 2-2 ENSTROM 480B OPERATOR'S MANUAL FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 CHAPTER 2. NORMAL PROCEDURES TABLE OF CONTENTS SECTION DESCRIPTION PAGE 2-29 Maximum Power Takeoff Profiles ..................................... 2-24 2-30 Crosswind Takeoff .................... 2-26 2-31 Climb ....................................... 2-26 2-32 Cruise ...................................... 2-26 2-33 Descent .................................... 2-26 2-34 Before Landing ......................... 2-26 2-35 Approach and Landing ............. 2-27 2-36 Landing From A Hover .............. 2-28 2-37 After Landing ........................... 2-28 2-38 Engine Shutdown ..................... 2-29 2-39 Before Leaving The Helicopter ... 2-30 2-40 Night Flight .............................. 2-30 Section III Passenger Briefing .................... 2-31 Paragraph 2-41 Passenger Briefing .................... 2-31 Section IV Adverse Environmental Conditions ............................... 2-32 Paragraph 2-42 Cold Weather Operation ........... 2-32 2-43 Cold Weather Inspection ........... 2-32 2-44 Cold Weather Checks ............... 2-34 2-45 Snow ........................................ 2-36 2-46 Desert and Hot Weather Operations ............................... 2-39 2-47 Icing Conditions ....................... 2-40 2-48 High Altitude Operations .......... 2-41 2-49 High Altitude Cold Weather Operation ................................. 2-42 2-50 Deceleration Check ................... 2-42 LIST OF FIGURES FIGURE NO. DESCRIPTION PAGE 2-1 Exterior Check ..................................... 2-6 ENSTROM 480B OPERATOR'S MANUAL 2-21 FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 2-23. Sideward and Rearward Hovering Flight 1. From a stabilized hover, apply cyclic control pressure in the desired direction of flight to begin sideward or rearward movement. Maintain the desired heading with the pedals and height with the collective. The speed should not exceed that of a brisk walk. To return to a stationary hover, apply cyclic pressure opposite the direction of movement while coordinating collective pitch and pedals to maintain the desired height and heading. 2-24. Hover Taxi 1. From a stabilized hover, apply forward cyclic pressure to begin movement. Maintain the desired heading with the tail rotor pedals and height with the collective. The speed should not exceed that of a brisk walk. Changes in direction should be made primarily with pedal control to avoid excessive bank angles. To stop the forward movement, apply aft cyclic pressure while coordinating collective and pedals to maintain the desired height and heading. 2-25. Cyclic Trim 1. As required. 2-26. Hover Check 1. Perform the following checks at a hover: a. Flight controls – Check flight controls for correct response. b. Engine and transmission instruments – Check. c. Flight instruments – Check as required. (O) (1) Altimeter and IVSI – Check for proper indications of climb and descent. (2) Inclinometer – Ball free in the race. (O) (3) Turn needle, heading indicator, and magnetic compass – Check for proper turn indications left and right. 2-22 ENSTROM 480B OPERATOR'S MANUAL FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 NOTE Hover turns in excess of 30° per second will cause the RMI/HSI compass system (if installed) display of heading to be inaccurate. (O) (4) Attitude indicator – Check for proper indications of nose high and low, and banks left and right. (5) Airspeed indicator – Check airspeed. d. Engine power – Check. The power assurance check will allow the pilot to determine if sufficient power is available for takeoff and to achieve the performance calculated during the preflight preparation. The check is performed by establishing a stable hover and recording the pressure altitude, OAT, torque, TOT, and N1 . The actual TOT is then compared with the TOT determined from the power assurance check chart in Chapter 4 (Figure 4-10). If the actual TOT is less than or equal to the chart TOT the pilot is assured that the helicopter will achieve flight manual calculated performance. (If the actual TOT is higher than the chart TOT, reference the Rolls- Royce Compressor Bleed Control Valve graph1 to verify the bleed valve was closed at the time of check. The helicopter may need to be at max gross weight for an accurate TOT indication.) As a final check, the actual torque required to hover is then compared with the predicted values from the performance chart in Chapter 4. 2-27. Before Takeoff 1. Immediately prior to takeoff, the following checks shall be accomplished: a. N2 – 103% b. Systems – Check engine, transmission, electrical, and fuel systems indications. 1 Rolls-Royce M250-C20 Series Operation and Maintenance Manual, Figure 22, Compressor Bleed Control Valve Operation

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