AD 81-03-53 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | 188A | LOCKHEED-CALIFORNIA COMPANY Model L-188 Airplanes |
| aircraft | Lockheed Martin Corporation | 188C | LOCKHEED-CALIFORNIA COMPANY Model L-188 Airplanes |
Unsafe Condition
Cracks in the lower wing planks and fuel leakage at the Butt Line (B.L.) 65 splice joints.
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Required Actions
Visually check the lower B.L. 65 splice joints for fuel leakage prior to each takeoff. Inspect for cracks via X-ray or ultrasonic methods per Lockheed-California Service Bulletin 88/SB-707A. Repair all cracks prior to further flight using an approved method.
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Compliance Time
Within 48 hours calendar time after the effective date (February 2, 1982) or prior to reaching 25,000 hour time-in-service, whichever is later for airplanes with less than 25,000 hours time-in-service on the effective date.
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Affected Aircraft
Lockheed-California Company Model L-188 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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