AD 73-18-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | Airworthiness Directives; GENERAL DYNAMICS Models 340/440/580/640 and Model C-131E Series Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | 440 | Airworthiness Directives; GENERAL DYNAMICS Models 340/440/580/640 and Model C-131E Series Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131E | Airworthiness Directives; GENERAL DYNAMICS Models 340/440/580/640 and Model C-131E Series Airplanes |
Unsafe Condition
Collapse of the nose landing gear due to fatigue cracks in the drag strut upper left hand segments.
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Required Actions
Within ten landings after the effective date, inspect nose landing gear drag strut upper left hand segments for cracks using dye penetrant, eddy current, or ultrasonic methods. Replace the drag strut prior to further flight if cracks are found. Repeat inspections at intervals not exceeding 2,400 landings if no cracks are found. Use specific replacement parts or reworked parts with approved rework procedures.
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Compliance Time
Within ten landings after the effective date of this A.D., unless already accomplished with the last 590 landings prior to this A.D., and at one additional interval not to exceed 600 landings thereafter
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Affected Aircraft
General Dynamics Models 340/440/580/640 and Model C-131E Series airplanes certificated in all categories.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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