# SDR CALA2013082190639

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 18, 2013
- Submitted: August 23, 2013
- Operation: Air carrier
- Aircraft: N179UA
- Make and model: Boeing 747422
- Aircraft serial: 25158
- Aircraft time: 92,293 hours, 11,066 cycles
- Engine: Pwa PW4056
- System (JASC): [2560 · Emergency Equipment](https://openairdocs.org/jasc/2560)
- Part: Unknown
- Condition: Unknown
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2013082190639

## Discrepancy

EMERGENCY EVACUATION SYSTEM IS EMITTING LOW LEVEL OFF BEAT SIGNAL.  PULLED CIRCUIT BREAKER TO SILENCE ALARM, REVIEWED WDM TO VERIFY CIRCUIT BREAKER IS SOLELY FOR EVAC SIGNAL SYSTEM 25- 63-11 & -12.  RDF-T :DISCONNECTED ALL DOORS EVAC UNIT & OVERSTAIR & RECONNECTED INDIVIDUAL EVAC PANEL ONE AT A TIME. NO HELP. PUT NEW PANEL AT CAPTAINS, NO HELP. OPEN

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