AD 74-25-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | L-1011-385-1 | LOCKHEED-CALIFORNIA Model L-1011-385-1 Series Airplanes |
Unsafe Condition
Incipient failure condition in the housing of the fire pull handle module assembly, P/N 1520324.
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Required Actions
Adopt changes to the operator's operation manual: (1) Reschedule 'Fuel Tank Valve - Check Closed' as the first step before 'If warning persists after 30 seconds, discharge second bottle.' (2) Incorporate an operating limitation requiring APU auto-fire shutdown system to be armed during flight APU operation until SB 093-26-010, Part 2E is accomplished for APU fire pull handle P/N 1520324.
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Compliance Time
Within 72 hours of receipt of this AD.
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Affected Aircraft
Lockheed-CALIFORNIA Model L-1011-385-1 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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