# SDR DXTA2026020206739

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 30, 2026
- Submitted: February 2, 2026
- Operation: Air carrier
- Aircraft: [N128QS](https://openairdocs.org/aircraft/N128QS), registered now
- Make and model: Bombdr BD7001A11
- Aircraft serial: 60113
- Aircraft time: 1,601 hours, 752 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 8ES40980000
- Part serial: 5272772
- Condition: Defective
- Location: Zone 200
- 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/DXTA2026020206739

## Discrepancy

WHEN PLANE IS POWERED IN EMERGENCY LIGHTS ARE ON THE ARM OR OFF POSITION. ALL EMERGED LIGHTS ARE OFF AS EXPECTED. WHEN THE AP IS SHUTDOWN THE FWD EMERGENCY LIGHTS ARE RECEIVING POWER & ON. THIS INCLUDES THE EXTERIOR EMERGENCY LIGHTS TO RT OF CABIN DOOR AS WELL. ALL OTHER EMERGENCY LIGHTS ARE OUT AS THEY SHOULD BE.   INSPECTED WIRING FOR LOOSE GROUNDS AND CONNECTIONS, NO DEFECTS NOTED. REFER TO GL5500 DWG7003355007 REV E. R & R ELPS 1 IAW AMM 33-51-09. PERFORMED POST OP CHECKS AND FUNCTIONAL TEST OF THE EMERGENCY LIGHTS POWER SUPPLIES IAW AMM 33-51-09-720-801. SYS TESTS & FUNCTIONS WELL. RESTORED AIRCRAFT TO ORIGINAL CONFIGURATION. NO FURTHER DEFECTS NOTED.

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