AD 2017-05-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Airplanes |
Unsafe Condition
Failure of a retract port flexible hose on the main landing gear (MLG) retraction actuator could cause excessive hydraulic fluid leakage, leading to an undamped extension of the MLG and potential structural failure, resulting in an unsafe, asymmetric landing configuration.
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Required Actions
Inspect and replace defects and damage of the retract port flexible hoses on the MLG retraction actuators as required. Reorient the MLG retraction actuators and install reconfigured hydraulic tube assemblies for the retraction actuators.
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Compliance Time
Before further flight
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Affected Aircraft
Bombardier, Inc. Model DHC-8-400 series airplanes, excluding those with serial number 4425 and on, which were modified in production.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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