SDR UALA2010051101605

Service difficulty report · Line · Boeing 747422

Difficulty date: May 9, 2010
Submitted: May 13, 2010
Operation: Air carrier
Aircraft: N179UA
Make and model: Boeing 747422
Aircraft serial: 25158
Aircraft time: 79,724 hours, 9,743 cycles
Engine: Pwa PW4056
System (JASC): 4930 · APU Engine Fuel and Control
Part: Line
Condition: Leaking
Location: Apu Fuel
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

FOUND 1 GALLON OF FUEL IN APU-STAB SHROUD SUMP DRAIN. APU FWD FUEL LINE LEAKING AT CONSTANT RATE WITH APU RUNNING. DISCONNECTED APU SHROUD IN AFT PIT.2EA LOCATIONS PER MM. EVIDENCE OF FUEL AT BOTH LOCATION S. ALL APU FUEL LINE SECTIONS NEED REPLACING. RMV'D APU FUEL LINE 3 SECTIONS. FROM WHEEL WELL TO BULK PIT. WAITING ON CABIN FOR ACCESS TO LAST LINE. RMV'D LAST LINE FWD OF PRESS BULK HEAD INSTALLED NEW PACK. COMPLETED INSTALLING APU LINES. LEAK CK GOOD. REINSTALLED ALL SHROUDS.