Service difficulty report · Carbon Seal · Boeing 777222

Difficulty date
September 1, 2009
Submitted
September 4, 2009
Operation
Air carrier
Aircraft
N777UA
Make and model
Boeing 777222
Aircraft serial
26916
Aircraft time
57,849 hours, 10,848 cycles
Engine
Pwa PW4077
Part
Carbon Seal
Part number
EA70R606600U
Condition
Leaking
Location
Nr 2 Engine
Stage of operation
CR
How discovered
O
Nature of condition
K
Precautionary procedure
O

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

What was found

HIGHER THAN NORMAL OIL CONSUMPTION. CARBON DRIVE PAD SEAL FOR BACKUP GENERATOR (VSCF) IS LEAKING OIL AT A RATE OF 20 DROPS PER MINUTE FROM THE DRAIN MAST DURING 5 MINUTE ENGINE IDLE RUN ON NR 2 ENGINE. REPLACED DE-OILER CARBON DRIVE PAD SEAL. NO LEAKS FROM DE-OILER DRIVE PAD SEAL DURING 5 MINUTE IDLE ENGINE. CREW TO CONFIRM NORMAL IN FLIGHT PARAMETERS. VERIFICATION FLIGHT ACCOMPLISHED. SYS CHECKS OK.