AD 87-17-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | Airworthiness Directives; GENERAL DYNAMICS (Convair) Models 340, 440, and C-131 (Military) Series Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | 440 | Airworthiness Directives; GENERAL DYNAMICS (Convair) Models 340, 440, and C-131 (Military) Series Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131B | Airworthiness Directives; GENERAL DYNAMICS (Convair) Models 340, 440, and C-131 (Military) Series Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131D | Airworthiness Directives; GENERAL DYNAMICS (Convair) Models 340, 440, and C-131 (Military) Series Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131E | Airworthiness Directives; GENERAL DYNAMICS (Convair) Models 340, 440, and C-131 (Military) Series Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131F/R4Y-1 | Airworthiness Directives; GENERAL DYNAMICS (Convair) Models 340, 440, and C-131 (Military) Series Airplanes |
Unsafe Condition
Failure of the main landing gear drag strut pivot bolt and possible subsequent main landing gear collapse.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the main landing gear drag strut pivot bolt assembly using magnetic particle inspection procedures per Service Bulletin 640(340D)32-14. If no cracks are found, reinstall and repeat inspection within 500 hours time-in-service. If cracks are found, replace the bolt assembly with specified part numbers and follow subsequent inspection intervals based on the part number used.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 500 hours time-in-service after the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
General Dynamics (Convair) Models 340, 440, and C-131 (Military) series airplanes equipped with main landing gear drag strut pivot bolt assembly Part Numbers 340-5110105, 340-5110105-1, or 340-5110105-3.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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