Service difficulty report · Wire · Boeing 777222

Difficulty date
November 26, 2009
Submitted
November 30, 2009
Operation
Air carrier
Aircraft
N769UA
Make and model
Boeing 777222
Aircraft serial
26921
Aircraft time
57,809 hours, 10,731 cycles
Engine
Pwa PW4077
Part
Wire
Part number
W77543001B20
Condition
Malfunctioned
Stage of operation
NR
How discovered
9
Nature of condition
J
Precautionary procedure
O

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

What was found

FLIGHT CONTROL SYS STATUS MSG WITH ACTIVE MNT MSGS 27-10003 AND 27-10014. FURTHER T-S SHOWED THAT STABILIZER OPERATES WITH RT SYSTEM ONLY BY MANUAL OVERRIDE. NO MOVEMENT USING EITHER CONTROL COLUMN SWITCHES. NORMAL OPERATION WITH CENTER SYSTEM. PERFORMED FIM 27-41 TASK 802, CONFIRMED RT STCM SHUTOFF VALVE (M27213 V6) AT FAULT. NEEDS TO REPLACE RT STCM. FOUND SHORT IN WIRE FROM PRESSURE BULKHEAD TO STAB MODULE CONNECTOR. REPLACED CONNECTOR AT RT STCM -NO HELP. CONNECTOR DM27122AC STILL SHOWS GROUND AT PIN A2. NEED TO ACCESS CONNECTOR D7894P AT STA 2162. FOUND W7754-3001B-20 BETWEEN CONNECTORS D7894P AND DM27213B GROUNDED. REPAIRED SAME AND OPS CHECKED GOOD.