# SDR IPXA2025072636677

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 26, 2025
- Submitted: July 28, 2025
- Operation: Air carrier
- Aircraft: [N574UP](https://openairdocs.org/aircraft/N574UP), registered now
- Make and model: Boeing 747-44AF
- Registry model: [Boeing 747-44AF](https://openairdocs.org/model/boeing-747-44af) (OpenAirDocs)
- Aircraft serial: 35663
- Aircraft time: 63,231 hours, 9,843 cycles
- System (JASC): [2822 · Fuel Boost Pump](https://openairdocs.org/jasc/2822)
- Part: Motor
- Part number: 568130522001
- Part serial: 1289
- Condition: Failed
- Location: Fuel Transfer
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2025072636677

## Discrepancy

ATB,  EMERGENCY DECLARED,  FUEL IMBALANCE 2-3 EICAS ADVISORY MSG ON DEPARTURE.  MAXIMUM IMBALANCE REACHED 16,000 LBS WITHIN ABOUT 40 MIUNUTES. TANK 2 WAS LOW TANK.  RESULTED IN AIR TURN BACK.  REF. TECH ALERT ON MAINTENIX BARCODE T3F1800747A8,  REPLACED NR 3 FWD OVERRIDE PUMP IAW AMM 28-31-01, GROUND OPS AND LEAK CHECK GOOD. NO FUEL TRANSFER NOTED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.