AD 2012-08-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Airplanes |
Unsafe Condition
Failure of a retract port flexible hose of a main landing gear (MLG) retraction actuator could cause excessive hydraulic fluid leakage, leading to an undamped extension of the MLG and potential MLG structural failure, resulting in an unsafe asymmetric landing configuration.
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Required Actions
Perform a detailed inspection for defects and damage of the retract port flexible hose of the left and right MLG retraction actuators, in accordance with Bombardier Service Bulletin 84-32-89. If defects or damage are found, replace the retract port flexible hose with a new or serviceable one before further flight.
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Compliance Time
Within 600 flight hours after the effective date of this AD, and repeat the inspection at intervals not to exceed 600 flight hours.
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Affected Aircraft
Bombardier, Inc. Model DHC-8-400, -401, and -402 airplanes; certificated in any category; serial numbers 4001 and subsequent.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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