ABNORMAL
PROCEDURES
AIRPLANE
OPERATIONS
MANUAL
1-03-53
Page
8
Code
03
REVISION 40
AOM-145/1114
GUST LOCK FAILURE
LIGHT: GUST LOCK (amber)
On ground:
Do not takeoff.
In flight:
Do not push control column full Nose Down.
Avoid flying in turbulence conditions.
Consider diversion.
Avoid landing at airports with anticipated turbulence or crosswind.
NOTE: This procedure is applicable only to airplanes equipped with
electromechanical gust lock system.
PITCH TRIM SWITCH INOPERATIVE
EICAS CAUTION: PTRIM CPT SW FAIL, PTRIM F/O SW FAIL,
PTRIM BKP SW FAIL
On ground:
Deenergize the airplane and energize it again.
In flight:
Use another serviceable switch.
STIFFENED ELEVATOR
EICAS WARNING: AUTOPILOT FAIL (may be presented),
SPS 1-2 INOP (may be presented)
EICAS CAUTION: STICK PUSHER FAIL (may be presented)
CONDITION: Elevator control columns movement is stiffened.
Autopilot ........................................................................ DISENGAGE
Pitch Trim ...................................................................... AS REQUIRED
Avoid abrupt and large elevator inputs.
Consider descent to a warmer altitude.
Freezing conditions may lead to de/anti-icing fluids residues to
stiffen the elevator.
If the elevator control columns movement is not recovered:
JAMMED ELEVATOR Procedure............................ ACCOMPLISH
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