Issuance of Type Certificate: Restricted Category Agricultural Airplanes

AC 21.25-1 · FAA

Public domain · FAAAdvisory Circulars

Overview

The Issuance of Type Certificate: Restricted Category Agricultural Airplanes (AC 21.25-1) 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 21.25-1
Pages: 9
Chapters: 3

Key points

This advisory circular provides guidance for obtaining a type certificate in the restricted category for small agricultural airplanes under 14 CFR Part 21, § 21.25.
The certification process incorporates airworthiness standards from 14 CFR Part 23, but allows for exemptions deemed inappropriate for agricultural operations.
The FAA's Agricultural Airplane Certification Team developed this AC in collaboration with agricultural airplane manufacturers to address certification issues.
The application for a type certificate must be submitted to the responsible FAA Aircraft Certification Office (ACO) and will involve a series of meetings to establish certification requirements.
Restricted category airplanes manufactured outside the U.S. will be considered on a case-by-case basis, requiring special arrangements with the foreign airworthiness authority.

Frequently asked questions

What is the purpose of this advisory circular?

The purpose of this advisory circular is to provide information and guidance for obtaining a type certificate in the restricted category for small agricultural airplanes.

What regulations are related to the issuance of type certificates for restricted category agricultural airplanes?

Related regulations include 14 CFR Part 21, § 21.25, which addresses the issuance of type certificates for restricted category aircraft, and 14 CFR Part 23, which outlines airworthiness standards.

How does the FAA determine the certification standards for agricultural airplanes?

The FAA's Small Airplane Directorate is responsible for determining the certification standards that apply to small agricultural airplanes and those that are inappropriate for their special purpose.

What is required for an applicant to demonstrate compliance with the type certification basis?

The applicant must show compliance through inspections and tests conducted by the FAA, including conformity and compliance inspections throughout the type certification program.

Are there specific requirements for imported restricted category airplanes?

Yes, imported restricted category airplanes manufactured in foreign countries will be considered on a case-by-case basis, requiring special arrangements with the foreign airworthiness authority.

Appendix 1

12/1/97 AC 21.25-1 Appendix 1 APPENDIX 1. TYPICAL NORMAL CATEGORY REQUIREMENTS FOUND TO BE INAPPROPRIATE FOR SINGLE-ENGINE AGRICULTURAL RESTRICTED CATEGORY AIRPLANES In developing the following list of regulations (through Amendment 23-52) that generally are not appropriate for restricted category single-engine small agricultural airplanes, consideration was given only to regulations that are applicable to Part 23 normal category airplanes. All other regulations applicable to utility, acrobatic, and commuter category airplanes would be inappropriate.

Subpart B - Flight Section Subject 23.45 (d) Performance - General 23.75(a) and (g) Landing distance 23.221 Spinning 23.253 High speed characteristics Subpart C - Structure Pressurized cabin loads 23.365 23.571 Metallic pressurized cabin structures 23.629(f) Flutter 23.677(b) Trim systems Subpart D - Design and Construction 23.771(b) Pilot compartment 23.775(b), (c), and (e) Windshields and windows 23.781(b) Cockpit control knob shape 23.785(m) Seats, berths, litters, safety belts, and shoulder harnesses

Next: Appendix 1 →

Appendix 1

AC 21.25-1 12/1 /97 Appendix 1 Subpart D - Design and Construction (continued) Subject ,. Section Emergency exits 23.807(a)(3) Ventilation 23.83 l(b) Pressurized cabins 23.841 23.843 Pressurization tests Passenger and crew compartment interiors 23.853(c) Subpart F - Equipment 23.1303(e) Flight and navigation instruments 23.1305(d) Powerplant instruments 23.1321(d) and (e) Arrangement and visibility 23.l325(b)(2)(ii) Static pressure system 23.1325(b)(3) Static pressure system 23.1415 Ditching equipment 23.1416 Pneumatic de-icer boot system 23.1419 Ice protection 23.1441 Oxygen equipment and supply 23.1443 Minimum mass flow of supplemental oxygen 23.1449 Means for determining use of oxygen 23.1450 Chemical oxygen generators 23.1453 Protection of oxygen equipment from rupture

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Appendix 1

AC 2 1.25-1 12/1/97 Appendix 1 Subpart F - Equipment (continued) Section Subject 23.1457 Cockpit voice recorders 23.1459 Flight recorders Subpart G - Operating Limitations and Information 23.1505(c) Airspeed limitations 23.1523(a) Minimum flight crew 23.1524 Maximum passenger seating configuration 23.1545(d) Airspeed indicator 23.1559(a)(2) Operating limitations placard 23.1581(e) Airplane Flight Manual and Approved Manual Material - G eneral 23.1583(g), (h), G), and (1) Operating limitations