AD 68-23-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | 188A | LOCKHEED Model 188A and 188C Airplanes |
| aircraft | Lockheed Martin Corporation | 188C | LOCKHEED Model 188A and 188C Airplanes |
Unsafe Condition
Cracks originating at the forward edge of No. 1 upper wing plank aft 4 inches and between wing station 168 and 174, except areas hidden by spar cap or rib elements, extending aft and outboard.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 50 hours' time in service after the effective date, inspect No. 1 upper wing plank at specified areas for cracks. If cracks exist, perform approved repairs before further flight. Repeat inspections every 625 hours' time in service unless preventive repairs or reinforcements from SB No. 85/SB-665 are completed.
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Compliance Time
within the next 50 hours' time in service after the effective date of this AD, unless previously accomplished within the preceding 575 hours' time in service
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Affected Aircraft
Lockheed Model 188A and 188C airplanes
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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