AD 93-05-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-400 Series | BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 767-200 Series | BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 767-300 Series | BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 767-300F Series | BOEING Model 747-400 Series Airplanes |
Unsafe Condition
The unsafe condition involves potential arcing, deterioration, unusual hardness or softness, and cracking of the elastomer insert in the electrical power feeder connectors at engine firewalls, which could lead to undetected fires in the engine strut.
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Required Actions
Perform a visual inspection of the power feeder connectors at each engine firewall to detect signs of arcing, deterioration, unusual hardness or softness, and cracking of the elastomer insert. If damaged connectors are found, replace them before further flight. Subsequent inspections must be conducted at intervals not exceeding 800 flight hours, with an initial inspection within 30 days after December 30, 1992.
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Compliance Time
Within 30 days after December 30, 1992 (the effective date of AD 92-27-02, Amendment 39-8435)
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Affected Aircraft
Boeing Model 747-400 series airplanes with line positions up to and including 958, equipped with Rolls Royce engines and electrical power feeder connectors at engine firewalls; and Model 767 series airplanes with variable numbers VN111 through VN124, and VN130 through VN132, equipped with Rolls Royce engines and electrical power feeder connectors at engine firewalls.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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