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Number Office Title Date
121-16 AFS-330 Maintenance Certification Procedures Provides guidance for the preparation of an Operations Specification--Preface Page which will afford nominal and reasonable relief from approved service and overhaul time limits when a part is borrowed from another operator. 11-09-1970
20-71 AIR-120 Dual Locking Devices on Fasteners Provides guidance and acceptable means, not the sole means, by which compliance may be shown with the requirements for dual locking devices on removable fasteners installed in rotorcraft and transport category airplanes. 12-08-1970
20-74 AIR-120 Aircraft Position and Anticollision Light Measurements Contains useful information concerning measurements for intensity, covering, and color of aircraft position and anti-collision lights. 07-29-1971
20-76 AFS-330 Maintenance Inspection Notes for Boeing Provides maintenance inspection notes which can be used for the maintenance support program for certain structural parts of the B-707/720 series aircraft. 10-21-1971
20-29B ANE-100 Use of Aircraft Fuel Anti-icing Additives Provides information on the use of anti-icing additives PFA-55MB and Mil-I-27686 as an acceptable means of compliance with the FARs that require assurance of continuous fuel flow under conditions where ice may occur in turbine aircraft fuel systems. 01-18-1972
91-35 AAM-620 Noise, Hearing Damage, and Fatigue in General Aviation Pilots Acquaints pilots with the hazards of regular exposure to cockpit noise. Especially pertinent are piston-engine, fixed-wing, and rotary-wing aircraft. 03-28-1972
107-1 ACS-100 Aviation Security-Airports Furnishes guidance to those individuals and organizations having responsibilities under Part 107 of the Federal Aviation Regulations. It also provides recommendations for establishing and improving security for restricted or critical facilities and areas as the security of which is not dealt with in Part 107. 05-19-1972
61-10A AFS-630 Private and Commercial Pilots Refresher Courses Provides a syllabus of study requirements and describes the areas of training that should be emphasized. SN 050-011-00060-7 09-27-1972
150/5300-7B AAS-300 FAA Policy on Facility Relocations Occasioned by Airport Improvements or Changes Reaffirms to the aviation community the FAA policy governing responsibility for funding relocation, replacement and modification of air traffic control and air navigation facilities that are made necessary by improvements or changes to the airport. 11-08-1972
20-32B ACE-110 Carbon Monoxide (CO) Contamination in Aircraft Detection and Prevention Provides information on the potential dangers of carbon monoxide contamination from faulty engine exhaust systems or cabin heaters of the exhaust gas heat exchanger type. 11-24-1972
00.33A AFS-400 Nickel-Cadmium Battery Operational, Maintenance, and Overhaul Practices This circular provides guidelines for more reliable nickel-cadmium battery operation through proper operational and maintenance practices, and has been reissued to include reconditioning information. 02-14-1973
00-33A AFS-400 Nickel-Cadmium Battery Operational, Maintenance, and Overhaul Practices 02-14-1973
21-13 AIR-200 Standard Airworthiness Certification of Surplus Military Aircraft and Aircraft Built from Spare and Surplus Parts 04-05-1973
91-37A AFS-820 Truth in Leasing Provides information and guidance for lessees and conditional buyers of U.S. registered large civil aircraft. If you are planning to charter an airplane take a moment to learn about chartered and leased aircraft. 01-08-1974
61-9B AFS-630 Pilot Transition Courses for Complex Single Engine and Light, Twin-Engine Airplanes A guide to the procedures and standards to be followed for a thorough and comprehensive checkout in modern single- and twin-engine aircraft. SN 050-007-00226-2 01-15-1974
00-34A AFS-340 Aircraft Gound Handling and Servicing 07-29-1974
00.34A AFS-340 Aircraft Gound Handling and Servicing This advisory Circular contains information and guidance for the servicing and ground handling aircraft. 07-29-1974
00-6A AFS-400 Aviation Weather For Pilots and Flight Operations Personnel Provides an up-to-date and expanded text for pilots and other flight operations personnel whose interest in meteorology is primarily in its application to flying. 01-01-1975
90-45A AFS-400 Approval of Area Navigation Systems for use in the U.S. National Airspace System

Provides guidelines for implementation of two-dimensional area navigation (2D RNAV) within the U.S. National Airspace System (NAS). Provides for both VOR/DME dependent systems and self-contained systems such as Inertial Navigation Systems (INS).

AC 20-138C - Airworthiness Approval of Positioning and Navigation Systems supersedes the airworthiness considerations in AC 90-45A, Approval of Area Navigation Systems for use in the U.S. National Airspace System. Equipment previously approved per the airworthiness guidance in AC 90-45A is still valid for the operations and conditions stated in their approvals.


20-56A AIR-120 Marking of TSO-C72b Individual Flotation Devices Outlines acceptable methods for marking individual flotation devices which also serve as seat cushions 04-01-1975
90-58C AFS-310 VOR Course Errors Resulting from 50 kHz Channel Mis-Selection Provides information concerning a potentially hazardous situation when a 200 channel VOR receiver is inadvertently mistuned by 50 kHz from the frequency of a 100 kHz ground station. 04-07-1975
20-33B AIR-100 Technical Information Regarding Civil Aeronautics Manuals 1, 3, 4a, 4b, 5, 6, 7, 8, 9, 13, and 14 Advises the public that policy information contained in the subject Civil Aeronautics Manuals may be used in conjunction with specific sections of the Federal Aviation Regulations. 05-01-1975
150/5050-4 APP-400 Citizen Participation in Airport Planning

Provides guidance for citizen involvement in airport planning. Although not mandatory for airport grant programs, it explains the need for early citizen participation.

Note: Portions of this AC are under review for update. Please contact the appropriate Regional Office or Airports District Office for assistance.

65-12A AFS-630 [Large AC] Airframe and Powerplant Mechanics Powerplant Handbook

Designed to familiarize student mechanics with the construction, theory of operation, and maintenance of aircraft powerplants. SN 050-007-00373-1

65-15A AFS-630 [Large AC] Airframe and Powerplant Mechanics Airframe Handbook

Designed to familiarize student mechanics with airframe construction, repair, and the operating theory of airframe systems. SN 050-007-00391-9

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