AD 88-07-51 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | L-1011-385-1 | Lockheed Aeronatuical Systems Company Models L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15, and L-1011- 385-3 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-14 | Lockheed Aeronatuical Systems Company Models L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15, and L-1011- 385-3 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-15 | Lockheed Aeronatuical Systems Company Models L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15, and L-1011- 385-3 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-3 | Lockheed Aeronatuical Systems Company Models L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15, and L-1011- 385-3 Series Airplanes |
Unsafe Condition
A fire from a failed AC electrical motor-driven hydraulic pump electrical connector, in combination with leaking hydraulic fluid from the failed electro-hydraulic component.
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Required Actions
Within 100 flight hours after June 3, 1988, open and collar circuit breakers L12 'AC Pump B3' and L22 'AC Pump C3' using PACO plastic ring P/N S-4933959-503 or equivalent. Verify power removal by cycling the AC pumps switch lights and ensuring 'ON' legends do not illuminate. Installation of an AC Hydraulic Pump Magnetic Circuit Breaker Panel (MCBP) and associated wiring per Service Bulletin 093-29-088, Rev 1, allows reactivation of pumps after compliance.
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Compliance Time
Within 100 flight hours after June 3, 1988
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Affected Aircraft
Lockheed Aeronautical Systems Company Models L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15, and L-1011-385-3 series airplanes listed in Service Bulletin 093-29-A088 dated April 14, 1988.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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