AD 60-04-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | 188A | LOCKHEED All Model L-188 Airplanes |
| aircraft | Lockheed Martin Corporation | 188C | LOCKHEED All Model L-188 Airplanes |
Unsafe Condition
Fatigue failures of front Lord engine mounts of old design in the web and fillet areas.
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Required Actions
Inspect mounts for cracks in web and fillet areas upon next arrival at maintenance facility and repeat inspections at intervals not exceeding 50 flight hours. Replace cracked mounts immediately with LM-204A-SA5/Lockheed P/N 632182-9. Replace all LM-204A-SA4 mounts with LM-204A-SA5 within 300 flight hours after first inspection but not later than March 1, 1960. Modify all spare quick engine change units with new SA5 mounts before installation.
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Compliance Time
Within the time specified: inspections must be done upon next arrival at scheduled stop with maintenance facilities, and repeated within 50 flight hours. Replacement of all LM-204A-SA4 mounts must occur within 300 flight hours after first inspection or by March 1, 1960.
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Affected Aircraft
Lockheed Martin Corporation models 188A and 188C equipped with Lord engine mounts number LM-204A-SA4.
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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