AD 75-22-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | Litton Systems | 707-100 Long Body | Airworthiness Directives; LITTON SYSTEMS, INC., AERO PRODUCTS DIVISION: Applies To All LTN-72 Inertial Navigation Systems |
| aircraft | The Boeing Company | Litton Systems | 707-100B Long Body | Airworthiness Directives; LITTON SYSTEMS, INC., AERO PRODUCTS DIVISION: Applies To All LTN-72 Inertial Navigation Systems |
| aircraft | The Boeing Company | Litton Systems | 707-100B Short Body | Airworthiness Directives; LITTON SYSTEMS, INC., AERO PRODUCTS DIVISION: Applies To All LTN-72 Inertial Navigation Systems |
| aircraft | The Boeing Company | Litton Systems | 707-200 | Airworthiness Directives; LITTON SYSTEMS, INC., AERO PRODUCTS DIVISION: Applies To All LTN-72 Inertial Navigation Systems |
| aircraft | The Boeing Company | Litton Systems | 707-300 Series | Airworthiness Directives; LITTON SYSTEMS, INC., AERO PRODUCTS DIVISION: Applies To All LTN-72 Inertial Navigation Systems |
| aircraft | The Boeing Company | Litton Systems | 707-300B Series | Airworthiness Directives; LITTON SYSTEMS, INC., AERO PRODUCTS DIVISION: Applies To All LTN-72 Inertial Navigation Systems |
| aircraft | The Boeing Company | Litton Systems | 707-300C Series | Airworthiness Directives; LITTON SYSTEMS, INC., AERO PRODUCTS DIVISION: Applies To All LTN-72 Inertial Navigation Systems |
| aircraft | The Boeing Company | Litton Systems | 707-400 Series | Airworthiness Directives; LITTON SYSTEMS, INC., AERO PRODUCTS DIVISION: Applies To All LTN-72 Inertial Navigation Systems |
| aircraft | The Boeing Company | Litton Systems | 747-100 Series | Airworthiness Directives; LITTON SYSTEMS, INC., AERO PRODUCTS DIVISION: Applies To All LTN-72 Inertial Navigation Systems |
| aircraft | The Boeing Company | Litton Systems | 747-100B Series | Airworthiness Directives; LITTON SYSTEMS, INC., AERO PRODUCTS DIVISION: Applies To All LTN-72 Inertial Navigation Systems |
Unsafe Condition
Failure to provide a failure warning indication of power loss in the LTN-72 inertial navigation systems.
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Required Actions
Accomplish Litton Service Bulletin No. 34-72-80, dated February 20, 1975, or later FAA-approved revision, or an equivalent installation approved by the Chief, Aircraft Engineering Division, FAA Western Region.
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Compliance Time
prior to January 1, 1976 unless already accomplished
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Affected Aircraft
Litton Systems, Inc., Aero Products Division LTN-72 inertial navigation systems installed on various airplane models, including McDonnell Douglas DC-8 and DC-10 airplanes and Boeing 707 and 747 airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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