# SDR 2021FA0000061

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2021
- Submitted: February 25, 2021
- Operation: General aviation
- Aircraft: [N379QS](https://openairdocs.org/aircraft/N379QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500294
- Aircraft time: 4,455 hours, 3,530 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 6450LS00
- Part serial: 002172
- Condition: Failed
- Location: Emergency Lights
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2021FA0000061

## Discrepancy

AIRCRAFT CREW REPORTED "EMER LT NOT ARM YELLOW CAS: DURING ENGINE START WITH GPU, EMER LT NOT ARM CAS MESSAGE WOULD DISPLAY MOMENTARILY AND EXTINGUISH ON ITS OWN WITHOUT PILOT ACTION.  CORRECTIVE ACTION: PERFORMED TROUBLESHOOTING BASED ON THE EMBRAER PHENOM 300 FIM TASK CHAPTER 33-50-00 AND FOUND NR 1 EMERGENCY BATTERY LIGHTS (COCKPIT) FAULTY.  PERFORMED REPLACEMENT NR 1 (COCKPIT) EMERGENCY LIGHT BATTERY IN ACCORDANCE WITH PHENOM 300 AMM CHAPTER 33-52-01.  PERFORMED OPERATIONAL TEST OF EMERGENCY LIGHT BATTERY IN ACCORDANCE WITH PHENOM 300 AMM CHAPTER 33-52-00.  NO DEFECTS NOTED.  THIS REPORT COMPLIES WITH FAA 14 CFR PART 135 OPERATOR'S GMM REQUIREMENTS.

---
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.