SDR UALA2012051002726

Service difficulty report · Seal · Boeing 747422

Difficulty date: May 5, 2012
Submitted: May 14, 2012
Operation: Air carrier
Aircraft: N197UA
Make and model: Boeing 747422
Aircraft serial: 26901
Aircraft time: 59,762 hours, 7,074 cycles
Engine: Pwa PW4056
Engine time: 3,200 hours, 10,897 cycles
System (JASC): 7261 · Turbine Engine Oil System
Part: Seal
Condition: Leaking
Location: Nr 4 Deoiler
Stage of operation: IN
How discovered: V
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

WHILE ACCOMPLISHING ENG CK 13 PER FIM71-08 FAULT TREES ON NR 4 ENGINE, FOUND EXCESSIVE AMOUNT OF OIL COMING OUT OF OVERBOARD BREATHER. COWLING IS COVERED WITH OIL AND FOUND OIL PUDDLING INSIDE COWLING DIRECTLY BELOW BREATHER. NEED TO ACCOMPLISH PARA (14) (B) ON PG 147 IN FIM71-08. REPLACED DEOILER SEAL PER MM 72-61-02.