AD 97-14-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | L-1011-385-1 | Lockheed Model L-1011 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-14 | Lockheed Model L-1011 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-15 | Lockheed Model L-1011 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-3 | Lockheed Model L-1011 Series Airplanes |
Unsafe Condition
Interference between the fireloop and a fuel line in the high speed gearbox could create a fire hazard and hinder fire detection.
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Required Actions
Install a new vent tube in the high speed gearbox of engines 1, 2, and 3 per Rolls-Royce Service Bulletin RB.211-72-4666, Rev 4. Modify the breather duct on engine 2's gearbox per Lockheed Service Bulletin 093-71-067, Rev 2. Install an additional fire detection system per Lockheed Service Bulletin 093-26-039, Rev 1 within specified compliance times.
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Compliance Time
Within 16,000 flight hours or 48 months after March 14, 1994, whichever occurs first for paragraphs (a)(1) and (a)(2). For paragraph (b), within 6,000 flight hours or 18 months after the effective date of this AD (August 7, 1997) if not previously installed.
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Affected Aircraft
Lockheed Model L-1011 series airplanes equipped with Rolls-Royce RB211-524 series engines, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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