Service difficulty report · Pcu · Boeing 777222

Difficulty date
August 24, 2012
Submitted
August 24, 2012
Operation
Air carrier
Aircraft
N797UA
Make and model
Boeing 777222
Aircraft serial
26924
Aircraft time
64,880 hours, 9,087 cycles
Engine
Pwa PW40903
Part
Pcu
Part number
15441007
Part serial
174
Condition
Faulty
Location
Right
Stage of operation
NR
How discovered
O
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

FLAPERON MAINTENANCE MSG. REMOVED & REPLACED RIGHT INBOARD FLAPERON PCU PER AMM. COMPLETED UP TO AND INCLUDING STEP G3C PG 416. RESET ACE L2, PASSES LRU TEST BUT NOT FLAPERON POSITION TEST, RPL ACE L2, ACP LRU TEST-PASSED LRU TEST BUT FLAPERON STILL FAILS POSITION TEST. RE-INSTALLED OLD ACE L2 AND ACP ACE LRU TEST-PASSED. REMOVED AND REPLACED RIGHT INBOARD FLAPERON PCU PER AMM. COMPLETED UP TO AND INCLUDING STEP G3C PG 416. REPLACED AGAIN BAD FROM STOCK RIGHTT INBOARD FLAPERON ACTUATOR RIGHT WING PER MM. UNIT INSTALLED IS DASH 205. RIGGED PER MM, CHECKS OKAY.