AD 79-22-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | L-1011-385-1 | LOCKHEED CALIFORNIA Model L-1011-385 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-14 | LOCKHEED CALIFORNIA Model L-1011-385 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-15 | LOCKHEED CALIFORNIA Model L-1011-385 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-3 | LOCKHEED CALIFORNIA Model L-1011-385 Series Airplanes |
Unsafe Condition
Delamination of forward and aft outflow valve gates could cause rapid loss of cabin pressurization in flight.
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Required Actions
Inspect forward and aft outflow valve gates within 800 hours' time in service after the effective date, and thereafter every 800 hours' time in service until modified. Replace defective gates with parts free from bond joint separation before further flight. Modify outflow valve assemblies within 2400 hours' time in service using Hamilton Standard Service Bulletin 21-1141.
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Compliance Time
Within 800 hours' time in service after the effective date of this AD and thereafter at intervals not to exceed 800 hours' time in service until modified; modify within 2400 hours' time in service after the effective date.
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Affected Aircraft
Lockheed California Model L-1011-385 series airplanes certificated in all categories, including models L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15, and L-1011-385-3.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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