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Tue, Mar 14, 2017

AD: Bombardier, Inc. Airplanes

AD NUMBER: 2017-05-11

PRODUCT: Certain Bombardier, Inc. Model DHC-8-400 series airplanes.

ACTION: Final Rule

SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2012-08-11 for the aircraft listed above.

AD 2012-08-11 required repetitive inspections for defects and damage of the retract port flexible hoses on the main landing gear (MLG) retraction actuators, and replacement if necessary.

This AD continues to require the actions in AD 2012-08-11, requires reorientation of the retraction actuator of the MLG, and removes airplanes from the applicability.

This AD was prompted by test results that showed that failure of a retract port flexible hose of a MLG retraction actuator could cause excessive hydraulic fluid leakage.

The FAA is issuing this AD to address the unsafe condition on these products.

DATES: This AD is effective April 17, 2017.

FMI: AD

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