AD Amdt-39-11282
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-400 | Airworthiness Directives; Boeing Model 747-400, 757-200, 767-200, and 767-300 Series Airplanes |
Unsafe Condition
Power supply failure in the modular avionic warning electronic assembly (MAWEA) due to inadequate over-voltage protection, which 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
Conduct repetitive checks to detect failures in the warning electronic unit (WEU) or MAWEA; perform repetitive tests to detect any failure of tactile, visual, or aural alerts generated by the WEU or MAWEA; and take corrective action if necessary. An optional terminating action for the repetitive checks and tests is also provided.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 747-400, 757-200, 767-200, and 767-300 series airplanes.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.