AD 2014-05-31
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Water accumulation in the drip shield above the M826 cardfile can exit over the edge and contaminate electrical components, potentially causing an electrical short and loss of essential functions for safe flight.
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Required Actions
Install modified drain tubes, relocate wire bundle routing, install a new drip shield and deflectors, and replace insulation blankets. For certain airplanes, also seal the drain slot, install spuds, and install drain tubes.
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Compliance Time
Before further flight
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Affected Aircraft
The Boeing Company Model 747-400 and 747-400F series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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