Type Certification Basis for Conversion from Reciprocating Engine to Turbine-Powered Part 23 Airplanes

AC 23-14 · FAA

Public domain · FAAAdvisory Circulars

Overview

The Type Certification Basis for Conversion from Reciprocating Engine to Turbine-Powered Part 23 Airplanes (AC 23-14) is a public-domain FAA advisory circular, republished here as a free chaptered HTML edition with a linked table of contents and the official PDF.

Publisher: FAA
Document: AC 23-14
Pages: 8
Chapters: 2

Key points

This advisory circular (AC) provides guidance on the certification basis for converting reciprocating engine airplanes to turbine engine-powered airplanes under Part 23 of the FAR.
The conversion process requires compliance with specific sections of the FAR, and may necessitate a new type certificate application for turbojet or turbofan installations.
Installations involving significant changes to structure, aerodynamics, or weight distribution may require additional certification requirements beyond this AC.
A certification flight test program is typically required for turbine engine conversions, addressing handling qualities, performance, and other operational characteristics.
Applicants should consult with the FAA Aircraft Certification Office early in the design process to ensure compliance and avoid delays.

Frequently asked questions

What is the purpose of AC 23-14?

The purpose of AC 23-14 is to provide information and guidance on acceptable means of showing compliance with Part 23 for converting reciprocating engine airplanes to turbine engine-powered airplanes.

Do I need a new type certificate for converting to a turbojet?

Yes, a change from reciprocating engine propeller-driven airplanes to turbojet or turbofan engine-powered airplanes will require a new application for a type certificate.

What should I consider before modifying an airplane?

Before modifying the airplane, the applicant should understand the existing structural and systems characteristics and the applicable certification requirements to avoid compatibility issues.

What is required for a certification flight test program?

The certification flight test program typically includes testing for handling qualities, performance, flutter, spins, and engine operating characteristics, among other factors.

How should I begin the certification process for a turbine engine conversion?

It is recommended to submit a proposed overall certification plan that outlines essential steps and a target schedule for required FAA approval tests and inspections.

Appendix 1

9/30/93 AC 23-14 Appendix 1 APPENDIX 1. RELATED ADVISORY CIRCULARS The advisory circulars (AC's) listed below may be obtained from the U.S. Department of Transportation, General Services Section, M-443.2, Washington, DC 20590: AC 20-36R Index of Articles (Materials, Parts, Processes and Appliances) Certified Under the Technical Standard Order System AC 20-66 Vibration Evaluation of Aircraft Propellers AC 20-73 Aircraft Ice Protection AC 20-88A Guidelines on the Marking of Aircraft Powerplant Instruments AC 20-110G Index of Aviation Technical Standard Orders AC 20-116 Marking Aircraft Fuel Filler Openings with Color Coded Decals AC 20-119 Fuel Drain Valves AC 20-122A Anti-misfueling Devices: Their Availability and Use AC 20-124 Water Ingestion Testing for Turbine Powered Airplanes AC 20-128 Design Considerations for Minimizing Hazards Caused by Uncontained Turbine Engine and Auxiliary Power Unit Rotor and Fan Blade Failures AC 20-135 Powerplant Installation and Propulsion System Component Fire Protection Test Methods Standards and Criteria AC 23-2 Flammability Tests AC 23-7 Substantiation for an Increase in Maximum Weight, Maximum Landing Weight, or Maximum Zero Fuel Weight AC 23-8A Flight Test Guide for Certification of Part 23 Airplanes

Next: Appendix 1 →

Appendix 1

AC 23-14 9/30/93 Appendix 1 AC 23-10 Auxiliary Fuel Systems for Reciprocating and Turbine Powered Part 23 Airplanes AC 23-12 Structural Substantiation of Part 23 Airplane Modifications Involving Increased Engine Power AC 23.629-1A Means of Compliance with Section 23.629, "Flutter" AC 23.955-1 Substantiating Flow Rates and Pressures in Fuel Systems of Small Airplanes AC 23.959-1 Unusable Fuel Test Procedures for Small Airplanes AC 23.961-1 Procedures for Conducting Fuel System Hot Weather Operation Tests AC 23.1011-1 Procedures for Determining Acceptable Fuel/Oil Ratio as Required by FAR 23.1011(b) AC 23.1309-1A Equipment, Systems, and Installations in Part 23 Airplanes AC 23.1329-2 Automatic Pilot Systems Installation in Part 23 Airplanes AC 23.1419-2 Certification of Part 23 Airplanes for Flight in Icing Conditions AC 36-4B Noise Certification Handbook