SDR CALA2014040390767

Service difficulty report · Unknown · Boeing 747422

Difficulty date: April 3, 2014
Submitted: April 4, 2014
Operation: Air carrier
Aircraft: N178UA
Make and model: Boeing 747422
Aircraft serial: 24385
Aircraft time: 97,575 hours, 11,643 cycles
Engine: Pwa PW4056
System (JASC): 2810 · Fuel Storage
Part: Unknown
Condition: Out Of Adjust
Location: Fuel System
Stage of operation: IN
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

WHILE FILLING THE NR 2 RESERVE FUEL TANK TO FULL, 9.2, FUEL STARTED TO MOVE OUT OF THE FWD VENT TUBE IN THE LT SURGE TANK. VENT TUBE LOCATED IN THE CEILING OF THE OTBD ACCESS PANEL FOR THE LT SURGE TANK. THE FWD FUEL VENT DRAIN VLV WAS SUSPECTED BAD. CHECKED OPERATION & VLV INTEGRITY FOUND GOOD IAW 28-13-01. RESERVE NR 2 FILL VLV CHECKED NORMAL IAW 28- 21-02. ADJUSTED VOLUME TOP OFF RES 2 & 3 IAW 28-21-32, CHECKED GOOD.