# SDR IPXA2026060120516

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 11, 2026
- Submitted: June 1, 2026
- Operation: Air carrier
- Aircraft: [N572UP](https://openairdocs.org/aircraft/N572UP), registered now
- Make and model: Boeing 747-44AF
- Registry model: [Boeing 747-44AF](https://openairdocs.org/model/boeing-747-44af) (OpenAirDocs)
- Aircraft serial: 35669
- Aircraft time: 64,951 hours, 10,294 cycles
- System (JASC): [2820 · Aircraft Fuel Distribution System](https://openairdocs.org/jasc/2820)
- 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
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2026060120516

## Discrepancy

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.

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