# SDR DXTA2021070844910

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 7, 2021
- Submitted: July 12, 2021
- Operation: Air carrier
- Aircraft: [N337QS](https://openairdocs.org/aircraft/N337QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500202
- Aircraft time: 6,001 hours, 4,778 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 6450LS00
- Part serial: 16095362
- Condition: Defective
- Location: Emergency Lights
- 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/DXTA2021070844910

## Discrepancy

CABIN EMERG LIGHT: WITH EMERGENCY LIGHTS IN ARM POSITION, DURING ENGINE START WE GOT A CAS MESSAGE THAT SAID EMER LIGHTS NOT ARMED.  WHILE INFLIGHT, EMERGENCY LIGHTS WERE FLICKERING WITH THE SWITCH IN THE ARM POSITION  COMPLIED WITH SL 505-33-0005 AND FIM 33-50-00-810-801-A  ISOLATED THE EMERGENCY LIGHT ISSUE TO THE AFT BATTERY. WE DISCONNECTED THE AFT BATTERY AND THE EMERGENCY LIGHTS OPERATED NORMAL. REMOVED AFT EMERGENCY BATTERY PIN 6450LS-00 SIN 1609. ACCESSED FWD EMERGENCY BATTERY. REMOVED AND REPLACED THE FWD EMERGENCY BATTERIES.   COMPLIED WITH SATISFACTORY OPERATIONAL CHECK. REFERENCE AMM 33-52-01-000/400-80-A.

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