# SDR SIMA990775

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 18, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N548AT
- Make and model: Aerosp ATR 72-212A
- Registry model: [Aerosp ATR 72-212A](https://openairdocs.org/model/aerospatiale-atr-72-212a) (OpenAirDocs)
- Aircraft serial: 548
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Relay
- Part number: EO218UXU120A
- Condition: Intermittent
- Location: Cabin
- Stage of operation: TX
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA990775

## Discrepancy

DFW - FLT 3556 - EXIT SIGNS AT FORWARD AND AFT BULKHEAD TURN OFF AND ON UNCOMMANDED.  REMOVED AND REPLACED RELAY 12E IAW ATR 72 STANDARD PRACTICES 20-00-00.  OPERATIONAL CHECK OF EMERGENCY LIGHTING WAS GOOD.  AIRCRAFT RETURNED TO SERVICE. (M)

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