AD 77-10-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 240 Series | Airworthiness Directives; GENERAL DYNAMICS Models 240, 340/440 Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | Airworthiness Directives; GENERAL DYNAMICS Models 240, 340/440 Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | 440 | Airworthiness Directives; GENERAL DYNAMICS Models 240, 340/440 Airplanes |
Unsafe Condition
Stress corrosion to the aluminum uplock quadrant lug in the nose landing gear could cause failure of the lug.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect P/N 240-5250109-6 nose landing gear uplock quadrant for cracks using a 2X magnifier or dye penetrant method within 60 hours time in service after the effective date, and repeat inspections at intervals not exceeding 60 hours until a steel quadrant (P/N 240-5250109-9) is installed. Replace cracked quadrants with new aluminum (P/N 240-5250109-6) or steel (P/N 240-5250109-9) parts before further flight. Aluminum quadrants must be replaced before 1,200 hours time in service. Installing a steel quadrant terminates AD requirements.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 60 hours time in service after the effective date of this AD, and at intervals not to exceed 60 hours time in service thereafter until (c) is performed
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Affected Aircraft
GENERAL DYNAMICS Models 240, 340/440 airplanes, including those modified for turbopropeller power per STC's SA1054WE, SA1096WE and SA4-1100, certificated in all categories.
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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