# SDR UALA2013040902387

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 9, 2013
- Submitted: May 8, 2013
- Operation: Air carrier
- Aircraft: N177UA
- Make and model: Boeing 747422
- Aircraft serial: 24384
- Aircraft time: 93,385 hours, 11,312 cycles
- Engine: Pwa PW4056
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Warning Message
- Condition: False Activation
- Location: Fire Loop
- 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/UALA2013040902387

## Discrepancy

NR 4 FIRE LOOP B EICAS STATUS MESSAGE DISPLAYED.   NO STATUS MESSAGE ON ARRIVAL.  MAINT MESSAGE 26027 SHOWS INTERMITTENT AND NOT ACTIVE.  FIRE PROTECTION SYS TEST PASSED ON CMC, NO RELATED FAULT FOUND.

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