Service difficulty report · Pump · Boeing 76734AF

Difficulty date
November 28, 2025
Submitted
December 1, 2025
Operation
Air carrier
Aircraft
N311UP
Make and model
Boeing 76734AF
Aircraft serial
27741
Aircraft time
73,875 hours, 25,008 cycles
Part
Pump
Part number
5006286F
Part serial
1909
Condition
Leaking
Location
Fuel Boost
Stage of operation
CR
How discovered
O
Nature of condition
K, J
Precautionary procedure
A

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

What was found

*** AIR TURN BACK *** SUSPECT FUEL LEAK L SIDE. RAN QRH. TOTALIZER GOT UP TO 2.2 LESS THAN CALCULATED FUEL. AS WELL AS LEFT MAIN TANK 2.0 LESS THAN R MAIN TANK WITH FUEL LEAK QRH. AFTER TURNING C FUEL (SEE PIC LP) ++ TECH RECOMMENDS LEFT AUX OVERRIDE BOOST PUMP REPLACEMENT FOR WEAK PUMP PERFORMANCE. AUX PUMP REMOVED AND REPLACED PER AMM 28-22-05. OPS CK GD. LEAK CK GD

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