AD 94-26-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | L-1011-385-1 | Lockheed Model L-1011-385 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-14 | Lockheed Model L-1011-385 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-15 | Lockheed Model L-1011-385 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-3 | Lockheed Model L-1011-385 Series Airplanes |
Unsafe Condition
Separation of the turbine blade assembly during spin tests due to inadequate lubrication of the turbine bearing, which could damage airplane structure and systems and lead to reduced controllability.
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Required Actions
Initial servicing or overhaul of the ram air turbine (RAT), incorporate repetitive overhaul actions into the FAA-approved maintenance program, and perform either a complete overhaul or servicing procedures every eight years.
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Compliance Time
Before further flight
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Affected Aircraft
Lockheed Model L-1011-385 series airplanes including L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15, and L-1011-385-3 models.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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