AD 80-10-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | 188A | LOCKHEED-CALIFORNIA COMPANY Model 188A and 188C Series Airplanes |
| aircraft | Lockheed Martin Corporation | 188C | LOCKHEED-CALIFORNIA COMPANY Model 188A and 188C Series Airplanes |
Unsafe Condition
Fatigue cracking of the wing front spar lower cap leading to loss of strength capability of the wing.
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Required Actions
Inspect the wing front spar lower cap per Lockheed Alert Service Bulletin 88/SB-699B. Reinspect prior to accumulating 500 hours' time in service since the last inspection. Repair any detected cracks prior to further flight per the service bulletin. Incorporate specified modifications/repairs via listed drawing numbers to terminate inspection requirements.
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Compliance Time
Before accumulating 30,000 hours' time in service or within the next 100 hours' time in service on those airplanes with 30,000 or more hours' time in service, unless accomplished within last 400 hours.
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Affected Aircraft
Lockheed-California Company Model 188A and 188C 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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