AD 2023-11-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc., Airplanes |
Unsafe Condition
Erratic electrical system status on the push button annunciators (PBAs) and the engine instrument and crew alerting system (EICAS) due to contamination of electrical contacts in the left-hand (LH) direct current power center (DCPC) internal communication data bus.
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Required Actions
Conduct a records check to determine the total flight hours and replace affected LH DCPC units (P/Ns 975GC02Y04, 975GC0Y05, 975GC02Y06, or 975GC02Y07). Optional terminating action includes modifying LH DCPC units having P/N 975GC02Y07 using Bombardier Service Bulletins 100-24-30 or 350-24-005.
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Compliance Time
Before further flight
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Affected Aircraft
Bombardier, Inc., Model BD-100-1A10 airplanes with affected LH DCPC units (P/Ns 975GC02Y04, 975GC0Y05, 975GC02Y06, or 975GC02Y07).
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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