Service difficulty report · Control Module · Boeing 757224

Difficulty date
September 12, 2019
Submitted
September 14, 2019
Operation
Air carrier
Aircraft
N33132
Make and model
Boeing 757224
Aircraft serial
29281
Aircraft time
84,549 hours, 18,269 cycles
Part
Control Module
Part number
160202101
Condition
Leaking
Location
Horiz Stab
Stage of operation
CR
How discovered
O
Nature of condition
K, J
Precautionary procedure
A

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

What was found

CENTER HYD QTY LOSS DOWN TO .05, TURNED OFF PUMP, QTY BACK UP TO .017. FOUND LEFT STAB TRIM CONTROL MODULE LEAKING. REMOVED LEFT STCM AND TRANSFER FITTINGS AND INSTALLED NEW O-RINGS OVER TO NEW PART IAW AMM 27-41-05-022-001. VERIFIED LEFT STCM PN AND FITTING INSTALL ONTO NEW PART AND OK TO INSTALL REF GMM 9-25-05. LOG PAGE 3195571 CREATED FOR STCM PRESSURE SWITCH BENT CONNECTOR. REPLACED LEFT STCM REF AMM 27-41-05-022-001. UNABLE TO STAB TRIM NOSE UP. SUSPECT BAD STCM FROM STOCK. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1198391 SN OFF 1031 MODULE, CONTROL OFF 19-2741-9-0002 1031 ON 19-2741-9-0002 0996. REPLACED LEFT STCM REF AMM 27-41-05-022-001. LEAK CHECK AND OPS CK GOOD. GOOD FOR RETURN TO SERVICE. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1231978 SN OFF 0996 MODULE, CONTROL OFF 19-2741-9-0002 0996 ON 19-2741-9-0002 0983.