AD 99-09-14
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
Cracking of fuselage station (FS) 983 main frame (left and right sides), which could result in reduced structural integrity of the fuselage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Review maintenance records to determine if a crack within the FS 983 main frame web was previously detected and repair deferred. Perform repetitive inspections as required until repair is accomplished. Repair deferred cracks within 18 months of the effective date using approved methods.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 20 days after December 18, 1991 for initial external inspection; within 60 days for internal inspection. Repetitive inspections continue until repair. Repair deferred cracks within 18 months of effective date (June 1, 1999).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lockheed Model L-1011-385 series airplanes, including L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15, L-1011-385-3, certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.