This advisory circular is an update to AC 43.13-2A, Acceptable Methods, Techniques, and Practices [ad]
Aircraft Alterations, dated January 1, 1977 and contains methods, techniques, and practices acceptable to the (FAA) Administrator for the inspection and alteration on non-pressurized areas of civil aircraft of 12,500 lbs gross weight or less. This Advisory Circular is for use by mechanics, repair stations, and other certificated entities. This data generally pertains to minor alterations; however, the alteration data herein may be used as approved data for major alterations when the AC chapter, page, and paragraph are listed in block 8 of FAA Form 337 when the user has determined that it is:
- Appropriate to the product being altered
- Directly applicable to the alteration being made
- Not contrary to manufacturer’s data This Advisory Circular contains the following chapters with information on:
- STRUCTURAL DATA
- COMMUNICATION, NAVIGATION, AND EMERGENCY LOCATOR TRANSMITTER SYSTEM INSTALLATIONS
- ANTENNA INSTALLATION
- ANTICOLLISION AND SUPPLEMENTARY LIGHT INSTALLATION
- SKI INSTALLATIONS
- OXYGEN SYSTEM INSTALLATIONS IN NONPRESSURIZED AIRCRAFT
- ROTORCRAFT EXTERNAL-LOAD-DEVICE INSTALLATIONS CARGO SLINGS AND EXTERNAL RACKS
- GLIDER AND BANNER TOW-HITCH INSTALLATIONS
- SHOULDER HARNESS INSTALLATIONS
- AIRCRAFT BATTERY INSTALLATIONS
- ADDING OR RELOCATING INSTRUMENTS
- CARGO TIEDOWN DEVICE INSTALLATIONS













