Aircraft Flap Actuators Quiz

The engagement of the force limiting device stalls the actuator, which then trips one of the system safety monitors and disengages the complete flap actuation system.

During flap retraction, the ratchet pawls ground the ratchet plate and force the skewed roller assembly to rotate. The skewed roller assembly provides braking torque proportional to the ballscrew load, and this braking torque is greater than the corresponding torque generated by the lead of the ballscrew.

The 'no back brake' is configured such that each no back brake is sufficient to hold position in the event that the other actuator in the same flap panel has dormant failed no back brake. This reduces the probability of the no back dormant failure.

<p>The 'no back brake' is designed with two ratchet pawls, springs, and different materials to preclude common mode failure. Additionally, the ratchet pawls are spaced such that they click into the ratchet plate at different times, facilitating an audible in-service check on the no back pawl functionality.</p> Signup and view all the answers

<p>The flap HCM is located in the main landing gear wheel well and receives command inputs from the FECU to extend or retract the flaps.</p> Signup and view all the answers

<p>The text does not provide any information about a dual channel sensor (resolver) in the flap actuation system. The given text does not mention a dual channel sensor or resolver.</p> Signup and view all the answers

<p>The braking torque generated by the skewed roller assembly is greater than the corresponding torque generated by the lead of the ballscrew.</p> Signup and view all the answers

<p>The 'no back brake gain' is the ratio of the braking torque divided by the ballscrew back driving torque. It is configured such that each no back brake is sufficient to hold position in the event that the other actuator in the same flap panel has a dormant failed no back brake.</p> Signup and view all the answers

<p>The engagement of the force limiting device stalls the actuator, which then trips one of the system safety monitors and disengages the complete flap actuation system.</p> Signup and view all the answers

<p>The ratchet pawls are spaced such that they click into the ratchet plate at different times, which facilitates an audible in-service check on the no back pawl functionality.</p> Signup and view all the answers