AD 64-11-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | 188A | LOCKHEED Models 188A and 188C Series Aircraft |
| aircraft | Lockheed Martin Corporation | 188C | LOCKHEED Models 188A and 188C Series Aircraft |
Unsafe Condition
Cracks have been detected in the upper wing planks on both the inboard and outboard sides of the nacelle where the inboard nacelle skate angles attach to the wing planks.
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Required Actions
Within 450 hours' time in service after the effective date, and every 450 hours thereafter, externally inspect the wing planks per Lockheed SB 88/SB-600 or FAA-approved equivalent. Within 900 hours' time in service after the effective date (or within 2,100 hours prior), and every 3,000 hours thereafter, internally inspect the wing planks by X-ray or visual means per the same service bulletin. Repair any cracks before further flight unless ferried under CAR 1.76.
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Compliance Time
Effective June 15, 1964
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Affected Aircraft
Lockheed Models 188A and 188C Series Aircraft
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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