Service difficulty report · Unknown · Boeing 757222

Difficulty date
July 8, 2007
Submitted
July 13, 2007
Operation
Air carrier
Aircraft
N512UA
Make and model
Boeing 757222
Aircraft serial
24809
Aircraft time
56,792 hours, 19,660 cycles
Engine
Pwa PW2037
Part
Unknown
Condition
Unknown
Location
Stab Trim
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

STAB TRIM WILL NOT TRIM IN NOSE DOWN DIRECTION WITH CENTER STAB TRIM CUTOUT SWITCH IN NORMAL AND RIGHT STAB TRIM SWITCH IN CUTOUT POSITION. TRIMS NORMALLY WITH TRIM LEVERS. [08-08-07] STABILIZER NOSE DOWN OPERATION STARTED WORKING OKAY AFTER CYCLING STABILIZER WITH ALTERNATE LEVERS. IN THE ALTERNATE ELECTRIC STAB TRIM MODE, THE UP LIMIT IS RESTRICTED TO APPROX.+3.85 DEGREES. PASSED MCDP TEST 65. REPLACED STAB TRAVEL LIMIT AND POSITION TRANSMITTER MODULE.