# SDR AALA201708219052

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 17, 2017
- Submitted: August 23, 2017
- Operation: Air carrier
- Aircraft: [N920AN](https://openairdocs.org/aircraft/N920AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29521
- Aircraft time: 52,892 hours, 21,307 cycles
- System (JASC): [2824 · Fuel Transfer Valve](https://openairdocs.org/jasc/2824)
- Part: Flow Valve
- Part number: 125334D2
- Part serial: U15012
- Condition: Faulty
- Location: Fuel System
- Part time: 7,175 hours, 2,902 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201708219052

## Discrepancy

AIRCRAFT WAS GROUNDED.  FUEL IMBALANCES BETWEEN RIGHT AND LEFT WINGS THREE TIMES THROUGHOUT A 2 HOUR FLIGHT IN EXCESS OF 500 LBS.  REMOVED AND REPLACED CENTER TANK FUEL CROSSFEED VALVE PER AMM 28-22-21.  OPERATIONAL AND LEAK CHECK GOOD.

---
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.