# SDR IPXA3M77669

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 22, 2013
- Submitted: March 27, 2013
- Operation: Air carrier
- Aircraft: N277UP
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48578
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Switch
- Condition: Failed
- Location: Emergency Lights
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA3M77669

## Discrepancy

EMERGENCY LIGHTS TEST BUTTON INTERNALLY FAILED.   R & R EMERGENCY EXIT LIGHT TEST SWITCH S1-402, OPS CHECKED GOOD IAW MM 33-50-00.

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