NPRM on CL300 Trim Actuator

AINmxReports » October 12, 2011
October 12, 2011, 3:35 PM

An FAA NPRM for the Challenger 300 horizontal stabilizer trim actuator states the No Back and the Number 1 motor brake assembly can both fail dormant. “…failure of the [system] along with additional component failure could result in an uncontrollable horizontal stabilizer surface runaway without the ability to retrim [and] could lead to the loss of the airplane.” A proposed new Airworthiness Limitation Task consists of a functional test to ensure that a dormant failure is detected and corrected. The FAA is accepting comments until November 25.


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