Service difficulty report · Fuel Sys · Boeing 74744AF

Difficulty date
May 11, 2026
Submitted
June 1, 2026
Operation
Air carrier
Aircraft
N572UP
Make and model
Boeing 74744AF
Aircraft serial
35669
Aircraft time
64,951 hours, 10,294 cycles
Part
Fuel Sys
Part number
568130685001
Part serial
1441
Condition
Out Of Balance
Stage of operation
CR
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

AFTER LEVEL OFF ENG 3 FUEL INDICATED 2,000LBS LESS THAN ENG 2. WE BALANCED THE FUEL MANUALLY BUT HAD TO CONTINUE TO BALANCE THE FUEL THE ENTIRE FLIGHT. SUSPECT ENG 3 PUMPS ARE STRONGER THAN ENG2 PUMPS. REMOVED AND REPLACED MAIN 2 AFT BOOST PUMP REF AMM 28-22-03. OPS CHECKED GOOD AT THIS TIME REF AMM 28-22-03. THIS CLEAR DEFERRAL.

More about the Boeing 747-44AF