Service difficulty report · Unknown · Boeing 777222

Difficulty date
July 17, 2007
Submitted
August 17, 2007
Operation
Air carrier
Aircraft
N783UA
Make and model
Boeing 777222
Aircraft serial
26950
Aircraft time
45,808 hours, 6,899 cycles
Engine
Pwa PW4090
Part
Unknown
Condition
Unknown
Location
Fuel Transfer Sy
Stage of operation
NR
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

UNEVEN FUEL TANKS AND CTR SCAVENGE SYS CTR TANK APPEARS TO BE TRANSFERING TO RT MAIN IMMEDIATELY. LT MAIN QTY UNCHANGED AND RT INCREASES ABOUT 2.3 DURING 1ST 2 HRS. IT ONLY TRANSFERED WHEN CENTER PUMPS WERE ON AND APPEARED TO FILL RT TANK TO LIMIT. OPTED RIGHT FUEL SCAVENGE SYSTEM. REVIEWED PREVIOUS HISTORY OF EARLY FUEL TRANSFER INTO RT MAIN FROM CENTER FUEL TANK. MX PERFORMED FUEL TRANSFER CHECK AND WAS NOT SUCCESSFUL IN DUPLICATING EARLY TRANSFER FROM THE CENTER RT FUEL SCAVANGE PUMP. THIS ITEM IS TO REMAIN OPEN FOR 3 FLT CYCLES FOR CREW COMMENTS ON REOCCURRING PROBLEM. NO PROBLEMS IN LAST SIX LEGS AS OF 24JUL2007. AIRCRAFT RETURNED TO SERVICEABLE STATUS.