AD 75-04-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | L-1011-385-1 | LOCKHEED Model L-1011-385-1 Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-14 | LOCKHEED Model L-1011-385-1 Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-15 | LOCKHEED Model L-1011-385-1 Airplanes |
Unsafe Condition
Heater blanket overheat conditions and possible fires caused by a malfunctioning cargo sump drain heater, Electrofilm P/N 111202-101 (LAC Control No. 672726-101).
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Required Actions
Disconnect the C-1, C-2, and C-3 cargo compartment drain heaters per Lockheed Alert Service Bulletin 093-30-A032, dated January 23, 1975, or later FAA-approved revisions, or equivalent deactivation modifications approved by the Chief, Aircraft Engineering Division, FAA Western Region.
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Compliance Time
within 10 calendar days after the effective date of this AD, unless already accomplished
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Affected Aircraft
Lockheed Model L-1011-385-1 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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