SDR UALA2013050703163

Service difficulty report · Fuel Line · Boeing 747422

Difficulty date: May 5, 2013
Submitted: July 15, 2013
Operation: Air carrier
Aircraft: N179UA
Make and model: Boeing 747422
Aircraft serial: 25158
Aircraft time: 91,766 hours, 11,011 cycles
Engine: Pwa PW4056
System (JASC): 7310 · Engine Fuel Distribution
Part: Fuel Line
Condition: Leaking
Location: Nr 4 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

AFTER ENGINE RUN, FOUND EVIDENCE OF FUEL DRIPPING FROM LOWER DRAIN TUBE BELOW AFT SAIL TAIL ON NR 4 ENGINE. OPENED UPPER STRUT ACCESS PNL 621 FT FOUND MAIN ENG FUEL LINE LEAKING FROM COUPLING AT FRONT SPAR AND LINE DAMAGED FROM CONTACT WITH ANTI-ICE CLAMP (CONT OF AMIS ITEM 7662034). REMOVED SAFETY WIRES AT FRONT SPAR COUPLING. REMOVED FUEL LINE, REF AMM 28-22-07-401 CONF NR 2. ORDERED O-RINGS AND RETAINING RINGS PER IPC 28-22-07-001A #290,#310. ADJUSTED CLAMP TO CLEAR FUEL LINE.