AD 2012-04-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Airplanes |
Unsafe Condition
Cracking of the DHC-8 Series 100 rudder actuator mounting bracket, which could result in loss of both rudder PCU actuators, leading to free play of the rudder control surface and loss of controllability of the airplane.
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Required Actions
Install a new CRES mounting adapter with new bolts for Model DHC-8-102, -103, -106, -201, -202, -301, -311, and -315 airplanes, or replace the existing upper and lower mounting adapters of the PCU with redesigned adapters for DHC-8-400, -401, and -402 airplanes. These actions must be performed in accordance with specified service bulletins.
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Compliance Time
Within 6,000 flight hours or 3 years after the effective date of this AD, whichever occurs first.
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Affected Aircraft
Bombardier, Inc. airplanes: Model DHC-8-102, -103, -106, -201, -202, -301, -311, and -315 airplanes, serial numbers 003 through 672 inclusive; and Model DHC-8-400, -401, and -402 airplanes, serial numbers 4001 through 4343 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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