# SDR 2007UALA01371

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 1, 2007
- Submitted: May 8, 2007
- Operation: Air carrier
- Aircraft: N187UA
- Make and model: Boeing 747422
- Aircraft serial: 26877
- Aircraft time: 57,911 hours, 6,964 cycles
- Engine: Pwa PW4056
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Sign
- Condition: Intermittent
- Location: Cabin
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2007UALA01371

## Discrepancy

UPPER DECK DOORS EXIT SIGNS INTERMITTENTLY FLASHING.  OPS CHECKED EMERGENCY LIGHT SYSTEM.  CHECKS OK.

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