Service difficulty report · Control Unit · Boeing 777222

Difficulty date
February 25, 2025
Submitted
February 28, 2025
Operation
Air carrier
Aircraft
N779UA
Make and model
Boeing 777222
Aircraft serial
26941
Aircraft time
100,356 hours, 18,717 cycles
Part
Control Unit
Part number
75860004
Part serial
9036
Condition
Faulted
Location
Zone 700
Part time
800,355 hours, 718,717 cycles
Stage of operation
TO
How discovered
O
Nature of condition
O
Precautionary procedure
C

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

What was found

MAIN GEAR STEERING CONFI G WARNING AFTER ADVANCE POWER ON T/O. R EPEAT REQUEST MEL 3253A TOMC APPROVED REF MEL 3253A MEL COMPLIED WITH. TOMC APPROVED. *DM* MBF IS SHOWING MAINT MSG 32-63020 - RECOMMEND FIM 32-53 TASK 810 FOR INITIAL T/S - PLS NOTE 4 FEB LP 3765362 - PCA WAS FOUND TO BE LOOSE - RECOMMEND TO ALSO ENSURE THE SAFETY AND INTEGRITY OF THE PCA INSTALLATION PERFORMED FIM: 32-53 TASK 810, AFTER INITIAL EVALUATION, THE MAT SHOWS NOT ACTIVE FOR THE MAINTENANCE MESSAGE. REPLACED THE MGSCU, M32037, AS PRECAUTIONARY, PER AMM: 32-53-02/401. MAIN GEAR STEERING CONTROL UNIT (MGSCU) INSTALLATION TEST SATISFACTORY. STATUS MSG CLEARED. MEL CLEARED. PLACARD REMOVED.ROTABLE PARTS CHANGE WAS INDICATED - TT # 1711486 SN OFF 0077 IPC REFERENCE # 32-53-02-01 UNIT, CONTROL, OFF 27-3250-9-0001 9036 ON 27-3250-9-0001 0127