AD 2013-04-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Airplanes |
Unsafe Condition
Loss of the fixed frequency system, leading to the loss of power to the left and right buses and all systems serviced by these buses.
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Required Actions
Incorporate wiring modifications specified in Bombardier Service Bulletin 8-24-87, Revision B, dated April 3, 2012. Revise the airplane maintenance program by incorporating Task 2420/13, Operational Check of Relays K4, K5, K6, and K7.
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Compliance Time
Within 6,000 flight hours or 36 months after the effective date, whichever occurs first, for wiring modifications. Within 30 days after the effective date for maintenance program revision.
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Affected Aircraft
Bombardier, Inc. Model DHC-8-102, -103, -106, -201, -202, -301, -311, and -315 airplanes, serial numbers 002 through 672 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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