AD 68-10-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | Airworthiness Directives; GENERAL DYNAMICS Models 340, 440, and C-131E Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | 440 | Airworthiness Directives; GENERAL DYNAMICS Models 340, 440, and C-131E Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131E | Airworthiness Directives; GENERAL DYNAMICS Models 340, 440, and C-131E Airplanes |
Unsafe Condition
Cracks in the front spar lower rail can result in failure of the outboard wing.
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Required Actions
Inspect each front spar lower rail between wing stations 240 and 490 for cracks by removing the wig leading edge and visually inspecting, repair cracks per General Dynamics/Convair Service Engineering Report or approved method before further flight. Install a reinforcing strap per specified report or approved rework if cracks are repaired.
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Compliance Time
Within the next 300 hours time in service (if 23,500+ hours on effective date) or before 23,800 hours time in service (if less than 23,500 hours on effective date), with subsequent inspections not exceeding 1000 hours time in service. Repetitive inspections may be discontinued after repairs and reinforcing strap installation.
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Affected Aircraft
GENERAL DYNAMICS Models 340, 440, and C-131E airplanes including those using turbo propeller power.
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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