# SDR TRBA201131501

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 10, 2011
- Submitted: November 11, 2011
- Operation: Air carrier
- Aircraft: N420AT
- Make and model: Aerosp ATR 72-212
- Registry model: [Aerosp ATR 72-212](https://openairdocs.org/model/aerospatiale-atr-72-212) (OpenAirDocs)
- Aircraft serial: 420
- Aircraft time: 31,008 hours, 33,369 cycles
- System (JASC): [3160 · Central Display](https://openairdocs.org/jasc/3160)
- Part: Switch
- Condition: Failed
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TRBA201131501

## Discrepancy

WHEN LIGHT TEST ON THE MAIN ELECTRIC PANEL, THE OFF LIGHT ON THE EMERGENCY BATTERY DOES NOT ILLUMINATE ON THE SELECT OUT IS WORKING.   R & R EMERGENCY BATTERY PUSH BUTTON SWITCH FIN 45PA IAW AMM 20-45-11. OPT CHECK WORKING PROPERLY IAW JIC 33-10-00.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.