Embraer EMB145 Operation Manual page 435

PITCH TRIM RUNAWAY
EICAS WARNING: AUTOPILOT FAIL (may be presented)
EICAS CAUTION: AUTO TRIM FAIL (may be presented)
LIGHT: Master Warning light illuminates if AUTOPILOT FAIL
message is presented. Message Caution light illuminates if
AUTO TRIM FAIL message is presented.
CONDITION: Uncommanded pitch and respective trim pictorial
indication changes
Quick Disconnect Button ......................................... PRESS AND
NOTE: Do not change flap setting.
At safe altitude:
Pitch Trim Main System........................................... OFF
Pitch Trim Back Up System..................................... OFF
Quick Disconnect Button ......................................... RELEASE
WARNING: DO NOT OPEN THE SPEED BRAKE.
If control column forces are excessive, try to recover airplane control
by turning one system on and trimming the airplane as necessary.
Initiate with the Backup System. Leave the failed system off.
Autopilot........................................................................ AS REQUIRED
If neither Main nor Back Pitch Trim system is operative:
PITCH TRIM INOPERATIVE Procedure ................. ACCOMPLISH
REVISION 40
AIRPLANE
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