AD 99-17-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | L-1011-385-1 | Airworthiness Directives; Lockheed Model L-1011-385 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-14 | Airworthiness Directives; Lockheed Model L-1011-385 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-15 | Airworthiness Directives; Lockheed Model L-1011-385 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-3 | Airworthiness Directives; Lockheed Model L-1011-385 Series Airplanes |
Unsafe Condition
Fractured lower actuator pin of the horizontal stabilizer could result in reduced structural integrity of the horizontal stabilizer control system and consequent reduced controllability of the airplane.
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Required Actions
Perform repetitive inspections using borescope, eddy current, or magnetic particle methods per Lockheed Service Bulletin 093-27-306 to detect discrepancies (e.g., damage, cracking) of the lower actuator pins and/or bushings. Replace any discrepant components with new components. Replacement of all four actuator pins and bushings terminates the repetitive inspections.
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Compliance Time
Initial inspection due within specified flight cycles or 6 months after effective date, depending on flight cycle accumulation since replacement. Repetitive inspections at intervals not to exceed 350 or 1,000 flight cycles, depending on inspection method and flight cycle thresholds.
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Affected Aircraft
Lockheed Model L-1011-385-1, -1-14, -1-15, and -3 series airplanes as listed in Lockheed Service Bulletin 093-27-306, dated January 14, 1998.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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