Service difficulty report · Gearbox · Boeing 777222

Difficulty date
June 29, 2010
Submitted
June 30, 2010
Operation
Air carrier
Aircraft
N226UA
Make and model
Boeing 777222
Aircraft serial
30226
Aircraft time
34,907 hours, 4,279 cycles
Engine
Pwa PW40903
Engine time
34,008 hours, 4,218 cycles
Part
Gearbox
Condition
Leaking
Location
Nr 1 Engine
Stage of operation
IN
How discovered
O
Nature of condition
K
Precautionary procedure
K

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

What was found

NR 1 ENG HIGH OIL CONSUMPTION. COKING REPORTED ON LEFT OF THE ENG CASING, LOOK FOR OIL LEAKS, LOOSE CONNECTIONS AT FOLLOWING AREAS, CLEAN COKING, REPAIR LEAKS AS NEEDED. PRESSURIZED GEARBOX FOR 40 MIN WITH NO LEAKS. ACP'D 2 IDLE RUNS WITH NO LEAKS. ACP'ED HIGH POWER RUN AND FOUND WET AREA AT 9:00 POSITION MID CASE AREA. COMPLETED INSPECTION OF OIL LEAK. INSPECTED ALL B-NUTS. FOUND ALL SECURE AND NO OIL LEAK VISIBLE IN COKING AREA.