AD 2005-06-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 757-200 | Airworthiness Directives; Boeing Model 757-200 Series Airplanes |
Unsafe Condition
The master dim and test system circuit does not have wiring separation of the test ground signal for redundant equipment in the flight compartment, which could result in a single fault failure during flight, leading to test patterns instead of selected radio frequencies showing on the communications panel.
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Required Actions
Modify the wiring of the test ground signal for the master dim and test system circuit in the flight compartment by performing all applicable actions specified in Boeing Service Bulletin 757-33-0050, Revision 2, dated December 4, 2003.
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Compliance Time
Within 60 months after the effective date of this AD.
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Affected Aircraft
Boeing Model 757-200 series airplanes, certificated in any category, as identified in Boeing Service Bulletin 757-33-0050, Revision 2, dated December 4, 2003.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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