AD 89-20-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | L-1011-385-1 | LOCKHEED AERONAUTICAL SYSTEMS COMPANY Model L-1011 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-14 | LOCKHEED AERONAUTICAL SYSTEMS COMPANY Model L-1011 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-15 | LOCKHEED AERONAUTICAL SYSTEMS COMPANY Model L-1011 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-3 | LOCKHEED AERONAUTICAL SYSTEMS COMPANY Model L-1011 Series Airplanes |
Unsafe Condition
Fuel leaking in the pylon due to insufficient clearance between the fuel feed line and hydraulic lines or chafing of the fuel feed line.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect the fuel feed line in Number 1 and Number 3 pylons between pylon stations PS89 and PS166 for clearance and chafing. Ensure a minimum of 0.25 inch clearance between the fuel line and hydraulic lines. Reposition, repair, or replace the fuel line if clearance is insufficient or chafing is present.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 500 hours time-in-service after the effective date of this AD, unless already accomplished within the last 1,600 hours time-in-service, and thereafter at intervals not to exceed 2,100 hours time-in-service from the last inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Model L-1011 series airplanes, 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
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