ENSTROM 480B OPERATOR'S MANUAL

manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED viii ENSTROM 480B OPERATOR'S MANUAL FAA Approved: 18 Mar 2025 Rev. 25 Report No. 28-AC-023 27 Jan 2025 INTENTIONALLY LEFT BLANK Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED INTRO-2 ENSTROM 480B OPERATOR’S MANUAL Report No. 28-AC-023 Feb 9/01 INTENTIONALLY LEFT BLANK Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED ENSTROM 480B OPERATOR’S MANUAL INTRO-3 Rev. 24 Report No. 28-AC-023 May 2/19 INTRODUCTION INTRO-1. General This manual contains the operating instructions, procedures and limitations for the Enstrom 480B helicopter. The manual is divided into two basic parts, the FAA approved Rotorcraft Flight Manual (RFM) and Supplemental Data Provided by The Enstrom Helicopter Corporation (Enstrom). Chapters 1, 2, 3, 4, and 5 make up the FAA approved RFM. It is required by Federal Regulations that this manual be carried in the helicopter at all times. Chapter 5, Optional Equipment Supplements, contains the optional equipment supplements incorporated into this basic RFM. Refer to the Enstrom Helicopter Corporation web site and the Technical Support page for a listing of other approved Enstrom 480B Optional Equipment Supplements not contained in this basic RFM. The pilot is responsible for determining if other additional optional equipment supplements are to be carried in the helicopter. INTRO-2. Warnings, Cautions, and Notes Warnings, Cautions, and Notes emphasize important and critical instructions and are used for the following conditions: WARNING An operating procedure, practice, etc. which, if not correctly followed, could result in personal injury or loss of life. CAUTION An operating procedure, practice, etc. which, if not strictly observed, could result in damage to or destruction of equipment. Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED INTRO-4 ENSTROM 480B OPERATOR’S MANUAL Rev. 24 Report No. 28-AC-023 May 2/19 NOTE An operating procedure, practice, etc., which is essential and requires additional information. INTRO-3. Description This manual contains the best operating instructions and procedures for the 480B helicopter under most circumstances. The observance of limitations, performance and weight and balance data provided is mandatory. The observance of procedures is mandatory except when modification is required because of multiple emergencies, adverse weather, terrain, etc. Your flying experience is recognized, and therefore, basic flight principles are not included. THIS MANUAL SHALL BE CARRIED IN THE HELICOPTER AT ALL TIMES. INTRO-4. Table of Contents The table of contents lists every titled paragraph, figure, and table contained in this manual. INTRO-5. Reporting of Errors Every effort is made to keep this publication current and error free. However, we cannot correct an error unless we know of its existence. You are encouraged to report errors, omissions, and recommendations for improving this publication by contacting The Enstrom Helicopter Corporation. INTRO-6. Explanation of Change Symbols Except as noted below, changes to the text and tables, including new material on added pages, are indicated by a vertical line in the margin. The vertical line will extend close to the entire area of the material affected. Symbols show current changes only. Change symbols are not utilized to indicate changes in the following: Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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. Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED INTRO-10 ENSTROM 480B OPERATOR’S MANUAL Rev. 1 Report No. 28-AC-023 Apr 10/02 INTENTIONALLY LEFT BLANK Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED ENSTROM 480B OPERATOR'S MANUAL 1-3 FAA Approved: May 21/19 Rev. 24 Report No. 28-AC-023 May 2/19 CHAPTER 1 OPERATING LIMITATIONS SECTION I. INTRODUCTION 1-1. Purpose 1. This chapter includes operating limitations and restrictions that must be observed during ground and flight operations. 1-2. General 1. The operating limitations set forth in this chapter are the direct results of design analysis and flight tests. Compliance with these limits will allow the pilot to derive maximum utility from the helicopter. 1-3. Operational Limits 1. Anytime an operational limit is exceeded an appropriate entry shall be made in the aircraft log book. The entry shall state what limit or limits were exceeded, and the range and time beyond the limits including any additional data that would aid maintenance personnel in the proper disposition of the entry and inspection of the aircraft. SECTION II. GENERAL 1-4. Kinds of Operation 1. This aircraft is certified in normal category for day and night VFR operation in non-icing conditions when the appropriate instruments and equipment required by the airworthiness and/or operating rules are installed and approved and are in operable condition. Table 1-1 lists the equipment that is required to be operable for typical VFR operations. Additional equipment may be required by operational regulations. The pilot is responsible for determining if there are additional requirements. Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 1-4 ENSTROM 480B OPERATOR'S MANUAL FAA Approved: May 21/19 Rev. 24 Report No. 28-AC-023 May 2/19 Table 1-1. Kinds of Operation Equipment List System and/or Component VFR DAY VFR NIGHT NOTES Airspeed Indicator 1 1 Altimeter 1 1 AMP/Volt 1 1 Clock 0 0 Compass 1 1 Dual Tachometer 1 1 Engine Oil Temperature/ Pressure 1 1 Fuel Quantity Indicator 1 1 N1 Indicator 1 1 OAT 1 1 Torque Indicator 1 1 TOT Indicator 1 1 Transmission Oil Temperature 1 1 Anticollision Lights 0 0 Instrument Lights 0 1 Landing Light 0 1 Position Lights 0 1 Switch and Circuit Breaker Panel Lighting 0 1 1-5. Minimum Crew Requirements 1. The minimum crew is one pilot. Solo from left seat only. Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED ENSTROM 480B OPERATOR'S MANUAL 1-5 FAA Approved: Feb 9/01 Report No. 28-AC-023 Feb 9/01 SECTION III. HELICOPTER AND SYSTEM LIMITS 1-6. Instrument Markings 1. The operating limitations for both the helicopter and systems are listed below and presented in Figure 1-1. 2. Operating Limitations and Ranges. Operating limitations and ranges are illustrated by the colored markings which appear on the dial faces of engine, flight and utility system instruments. Red markings on the dial faces of these instruments indicate the maximum and/or minimum limits. The green markings on the instruments indicate the safe normal range of operation. The yellow markings on the instruments indicate the range when special attention should be given to the operation covered by the instrument. Operation is permissible in the yellow range, but should be avoided. 1-7. Rotor Limitations 1. Normal Operating Limits. The maximum and minimum rotor RPM limits shown in Figure 1-1 apply during continuous powered flight and autorotation for all aircraft weight configurations. 2. Minimum Transient Rotor Speed. The minimum allowable transient rotor speed following engine failure or sudden power reduction for practice forced landing is 300 RPM. This is a transient limit and positive corrective action (lowering the collective) must be taken immediately by the pilot to regain at least 334 RPM (minimum power off rotor RPM). 1-8. Transmission Limits 1. The main transmission is subject to the torque limitations shown in Figure 1-2. Operating time above the maximum continuous limit of 65 PSI in the range of 65-72 PSI is limited to 5 minutes duration. Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 1-6 ENSTROM 480B OPERATOR'S MANUAL FAA Approved: Apr 16/10 Rev. 14 Report No. 28-AC-023 Apr 16/10 WARNING Aircraft operating limits are based on the transmission torque limits and not the engine torque limits. 1-9. Engine Limits 1. Power limits: a. Takeoff Power. Takeoff rated power is the maximum power permitted and is limited to a period of 5 minutes. Takeoff power is defined by a combination of torque and N2 speed. It may be limited by Turbine Outlet Temperature (TOT) on hot days or at high altitude. The limits for takeoff for this helicopter are: Torque 72 PSI Turbine Outlet Temperature 810°C N2 Speed 103% b. Normal Rated Power (Continuous). Normal rated power is the maximum continuous power limit for this helicopter and is also defined by a combination of torque and N2 speed. It may, under circumstances of high altitude or hot ambient conditions, be limited by TOT. The normal rated (continuous) power limits for this helicopter are: Torque 65 PSI Turbine Outlet Temperature 737°C N2 Speed 103% 2. Engine Overspeed. The engine overspeed limits are as follows: Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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). Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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. Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED 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 Visit www.enstromhelicopter.com for instructions to order an original manual and to register for email notification of updates. UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED