Trim And YSAS Malfunction

Question 1

What is one possible way of relieving stick pressure near approach speeds with a trim malfunction?

Answer 1

Use of the takeoff trim may provide some reduced stick forces because the takeoff trim system is independent

Question 2

With a trim malfunction, if you are able to trim the aircraft back into a neutral stick position, what should you do?

Answer 2

Pull the trim circuit breaker to prevent further runaway trim

Question 3

General corrective (checklist) actions for a trim malfunction?

Answer 3

1. Trim Button - Hold in opposite direction
2. Trim Control circuit breaker - Pull (FCP Pedestal)

Generally, attempt to trim against the runaway trim. If this is assisting with the condition, find a good neutral position and pull the CB. If it is not helping, attempt the takeoff trim button. If nothing is working, pull the CB.

Question 4

What are the indications of a YSAS malfunction?

Answer 4

• Yaw and moderate roll
• Chattering rudder pedals
• At high speed and high AOA, the roll rate is greater and the yaw is less noticeable

Question 5

Are you allowed to continue the flight is your Yaw Damper switch is off and will not reset?

Answer 5

If the aircraft responds normally to slight rudder airports, you may continue

Question 6

How many times can you attempt to reset the Yaw Damper Switch?

Answer 6

Only once

Question 7

Where is the YSAS circuit breaker located?

Answer 7

In the rear cockpit, thus if you are required to pull the CB you must be a dual crew

Question 8

What should you do if you are dual and the YSAS will not reset and rudder inputs are not normal?

Answer 8

Pull the STABILITY AUGMENTATION Circuit Breaker and continue the mission

Question 9

If you are solo and the YSAS fails and will not reset, and the rudder input responses are not normal, what should you do?

Answer 9

Stop flying the mission and RTB via a straight in.

Question 10

What would make you turn the EGI off due to a YSAS failure?

Answer 10

If you are solo and there a oscillating yawing motions that make landing questionable

Question 11

What is the general corrective (checklist) actions to take with a stability augment or malfunction?

Answer 11

1. AOA - Reduce (if able)
2. Apply opposite rudder and aileron as required
3. Yaw Damper switch - Off
4. Stab Augmentor CB - PULL (RCP, if malfunction continues
   If solo and landing is questionable
5. EGI - OFF