AD 76-20-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | L-1011-385-1 | LOCKHEED-CALIFORNIA COMPANY Model L-1011-385 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-14 | LOCKHEED-CALIFORNIA COMPANY Model L-1011-385 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-15 | LOCKHEED-CALIFORNIA COMPANY Model L-1011-385 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-3 | LOCKHEED-CALIFORNIA COMPANY Model L-1011-385 Series Airplanes |
Unsafe Condition
Collapse of a main landing gear assembly due to failure of one or both main landing gear upper side brace spherical bearing trunnion retaining bolts P/Ns 76754-18-71 or 69680v18-71 or 69680-18-71.
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Required Actions
Within 75 hours' time in service after the effective date, perform visual checks of each main landing gear upper side brace trunnion joint before each flight. If bolts are missing or structural deformation is found, replace both bolts and inspect side brace support fitting and trunnion bearing caps P/Ns 1504393-107/-108 and -109/-110 for damage, repairing or replacing as needed. Additionally, modify the upper side brace trunnion joints per Service Bulletin 093-32-115 by March 31, 1978, which negates paragraph (a) requirements.
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Compliance Time
on or before March 31, 1978, unless already accomplished
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Affected Aircraft
Lockheed-California Company 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, 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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