AD 90-13-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | GENERAL DYNAMICS (CONVAIR) Models 340, 440, and C-131, B, C, D, E, F, and G (Military) series airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | 440 | GENERAL DYNAMICS (CONVAIR) Models 340, 440, and C-131, B, C, D, E, F, and G (Military) series airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131B | GENERAL DYNAMICS (CONVAIR) Models 340, 440, and C-131, B, C, D, E, F, and G (Military) series airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131D | GENERAL DYNAMICS (CONVAIR) Models 340, 440, and C-131, B, C, D, E, F, and G (Military) series airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131E | GENERAL DYNAMICS (CONVAIR) Models 340, 440, and C-131, B, C, D, E, F, and G (Military) series airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131F/R4Y-1 | GENERAL DYNAMICS (CONVAIR) Models 340, 440, and C-131, B, C, D, E, F, and G (Military) series airplanes |
Unsafe Condition
Progressive damage to the airframe due to non-conforming or cracked holes in fuselage frames.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a visual inspection of fuselage frames per Service Bulletin 640 (340D) 53-15, Revision 1, within 1,650 hours time-in-service or 18 months after AD effective date, whichever comes first. Inspections specified in Part II must be done within 2,300 hours time-in-service or 24 months after AD effective date. Repair non-conforming or cracked holes before further flight as per the service bulletin.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Required as indicated, unless previously accomplished.
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, B, C, D, E, F, and G (Military) series airplanes, including all turbopropeller-converted airplanes.
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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