Service difficulty report · O-Ring · Boeing 747422

Difficulty date
November 20, 2014
Submitted
November 24, 2014
Operation
Air carrier
Aircraft
N128UA
Make and model
Boeing 747422
Aircraft serial
30023
Aircraft time
58,728 hours, 6,755 cycles
Engine
Pwa PW4056
Engine time
76,437 hours, 8,599 cycles
Part
O-Ring
Condition
Damaged
Location
Nr 2 Engine
Stage of operation
CR
How discovered
O
Nature of condition
K
Precautionary procedure
E, A

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

What was found

SHOWING ZERO OIL QTY NR 2 ENG, TEMP NORMAL. CREW REPORTED PRESS AT 140 PSI & DROPPING. ENG SHUTDOWN 7282006 FOUND ORING ON NR 3 TEMP THERMOCOUPLE PROBE LEAKING WITH ENG STATIC. R & R NR 3 BEARING OIL TEMP THERMOCOUPLE PROBE. IAW JRH-2-86-63 WINDMILL & POWER ASSURANCE RUN ONE HOUR, NO NOTED OIL LOSS.