# SDR ASAA2018010623106

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 6, 2018
- Submitted: January 9, 2018
- Operation: Air carrier
- Aircraft: [N563AS](https://openairdocs.org/aircraft/N563AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35180
- Aircraft time: 42,461 hours, 12,766 cycles
- System (JASC): [2820 · Aircraft Fuel Distribution System](https://openairdocs.org/jasc/2820)
- Part: Transfer Valve
- Part number: 125334D1
- Part serial: AA86810
- Condition: Malfunctioned
- Location: Fuel System
- Part time: 42,461 hours, 12,766 cycles
- Stage of operation: NR
- 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/ASAA2018010623106

## Discrepancy

FUEL IMBALANCE. ACFT GROUNDED.  ACCOMPLISHED CROSSFEED VALVE ALIGNMENT IAW AMM 28-22-21-820-801.  REMOVED AND REPLACED THE ENGINE FUEL CROSSFEED VALVE BODY IAW AMM 28-22-21-000-803, AND AMM 28-22-21-400-803.  COMPLETED ALL OPS AND LEAK CHECKS. NO UNWANTED 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.