# SDR UALA2010080402819

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 2, 2010
- Submitted: August 6, 2010
- Operation: Air carrier
- Aircraft: N589UA
- Make and model: Boeing 757222
- Aircraft serial: 28707
- Aircraft time: 50,349 hours, 14,029 cycles
- Engine: Pwa PW2037
- System (JASC): [3140 · Central Computers](https://openairdocs.org/jasc/3140)
- Part: Warning System
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2010080402819

## Discrepancy

EICAS SHOWS L ELEV PCU MSG.  MSG ERASED, BUT RETURNS.  TROUBLESHOT PER FIM MM.  OPS CHECKED IT SEVERAL TIMES, UNABLE TO DUPLICATE MSG.  REPLACED PCU MONITOR MODULE M10481 FOR PRECAUTION, 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.