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Fri, Apr 27, 2012

AD: Bombardier DHC-8-400 Airplanes

AD NUMBER: 2012-08-11

PRODUCT: Certain Bombardier, Inc. Model DHC-8-400 series airplanes
SUBJECT: Airworthiness Directive 2012-08-11
ACTION: Final Rule

SUMMARY: This AD was prompted by test reports that showed that failure of a retract port flexible hose of a main landing gear (MLG) retraction actuator could cause excessive hydraulic fluid leakage. This AD requires a detailed inspection for defects and damage of the retract port flexible hose on the left and right MLG retraction actuator and replacement of the flexible hose if needed.

The FAA is issuing this AD to detect and correct defects and damage of the retract port flexible hose which could lead to an undamped extension of the MLG and could result in MLG structural failure, leading to an unsafe asymmetric landing configuration.

DATES: This AD becomes effective May 29, 2012.

FMI: AD

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