# SDR DALA2026092805393

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 21, 2026
- Submitted: September 28, 2026
- Operation: Air carrier
- Aircraft: [N312DU](https://openairdocs.org/aircraft/N312DU), registered now
- Make and model: Airbus BD-500-1A11
- Registry model: [Airbus BD-500-1A11](https://openairdocs.org/model/airbus-canada-lp-bd-500-1a11) (OpenAirDocs)
- Aircraft serial: 55170
- Aircraft time: 12,615 hours, 5,350 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Light Sys
- Condition: Faulted
- Location: Zone 200
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2026092805393

## Discrepancy

EMERGENCY LIGHT FAULTS ON CMS PANEL, EMERGENCY LIGHTS DO NOT TURN ON WHEN SELECTED "ON" ON OVERHEAD PANEL. CYCLED AIRCRAFT POWER REF WORK CARD 0543-2002. NO HELP. INTERROGATED OMS W/ EMER LTS OVERHEAD SWITCH IN OFF GOT FAULT CODES 3351F0002, F0004, F0008, F0010, F0012, AND F0012, W/ OH SW IN ON POSITION EMER LTS DO NOT WORK. PERFORMED EPSU OPS TEST REF A220 AMP 33-51-00 FOUND FWD FAP SW CYCLED. NOW OPS GOOD. NO FAULTS ACTIVE IN OFF, ARM OR ON POSITION. (LP# 9110148; AIRCRAFT WAS GROUNDED)

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