AD 2001-11-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-400 | Airworthiness Directives; Boeing Model 747-400, 747-400F, 757-200, 757-200CB, 757-200PF, 767-200, 767-300, and 767-300F Series Airplanes |
Unsafe Condition
Failure of the warning electronic unit (WEU) or modular avionic warning electronic assembly (MAWEA) power supplies, due to inadequate over-voltage protection, could result in loss of visual, aural, and tactile alerts to the flightcrew.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace any subject power supply in the WEU or MAWEA with a new, modified, or serviceable power supply within 1 year after the effective date of this AD. For airplanes not already replaced, continue the checks and functional tests as required by this AD.
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Compliance Time
Within 1 year after the effective date of this AD.
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Affected Aircraft
Boeing Model 747-400, 747-400F, 757-200, 757-200CB, 757-200PF, 767-200, 767-300, and 767-300F series airplanes equipped with a WEU or MAWEA power supply having part number 285T0035-201.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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