AD 75-09-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | L-1011-385-1 | LOCKHEED-CALIFORNIA COMPANY Model L-1011-385-1 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-14 | LOCKHEED-CALIFORNIA COMPANY Model L-1011-385-1 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-15 | LOCKHEED-CALIFORNIA COMPANY Model L-1011-385-1 Series Airplanes |
Unsafe Condition
Failure of hydraulic dampers identified by Part Number 672470-101, -103, -105 could result in dangerous flutter leading to damage or loss of elevators, outboard ailerons, and rudder control surfaces and/or associated lifting surfaces.
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Required Actions
Inspect, service, and replace dampers as required on elevators, outboard ailerons, and rudder per Lockheed Alert Service Bulletin 093-27-A126. Replace dampers with -105 configuration per Service Bulletin 093-27-088 if required. Equivalent actions may be approved by FAA.
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Compliance Time
Within 300 flight hours of the effective date (May 2, 1975) for elevators, 500 flight hours for outboard ailerons, and 1500 flight hours for rudder, with subsequent intervals not exceeding the same flight hours respectively.
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Affected Aircraft
Lockheed-California Company Model L-1011-385-1 series airplanes with hydraulic dampers Part Number 672470-101, -103, -105, including serial numbers 193X-1102 and subsequent for elevators.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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