# SDR 2007UALA00831

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 2007
- Submitted: March 27, 2007
- Operation: Air carrier
- Aircraft: N543UA
- Make and model: Boeing 757222
- Aircraft serial: 25698
- Aircraft time: 58,565 hours, 17,092 cycles
- Engine: Pwa PW2037
- System (JASC): [2560 · Emergency Equipment](https://openairdocs.org/jasc/2560)
- Part: Warning System
- Condition: Malfunctioned
- Location: Cabin
- Stage of operation: IN
- 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/2007UALA00831

## Discrepancy

EVAC ALARM HAS ACTIVATED AT ALL STATIONS ALL BY ITSELF.  PRESSED HORN SHUTOFF, NO HELP. [SUP 06-14-07]  TESTED EVAC SYSTEM PER UA ENGINEERING SPECIFICATIONS.  SYSTEM TESTED GOOD.  NO DEFECTS NOTED.  UNABLE TO ESTABLISH ANY CAUSE FOR THIS IRREGULARITY EVENT.

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