# SDR UALA2012072704075

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 24, 2012
- Submitted: July 30, 2012
- Operation: Air carrier
- Aircraft: N521UA
- Make and model: Boeing 757222
- Aircraft serial: 24891
- Aircraft time: 71,290 hours, 26,597 cycles
- Engine: Pwa PW2037
- System (JASC): [2432 · Battery/Charger System](https://openairdocs.org/jasc/2432)
- Part: Battery
- Part number: 18550000
- Part serial: 524
- Condition: Faulty
- Location: Main
- 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/UALA2012072704075

## Discrepancy

EICAS MESSAGE, MAIN BATTERY CHARGER DISPLAYED AND BATTERY DISCHARGE LIGHT EXTINGUISHED.  REPLACED MAIN AIRCRAFT BATTERY, OPS CHECKED 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.