# SDR DALA2025102007629

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 16, 2025
- Submitted: October 20, 2025
- Operation: Air carrier
- Aircraft: [N112DU](https://openairdocs.org/aircraft/N112DU), registered now
- Make and model: Airbus BD-500-1A10
- Registry model: [Airbus BD-500-1A10](https://openairdocs.org/model/airbus-canada-ltd-ptnrsp-bd-500-1a10) (OpenAirDocs)
- Aircraft serial: 50031
- Aircraft time: 16,456 hours, 7,471 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Apu
- Condition: Failed
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: E, A
- Precautionary procedure: F, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2025102007629

## Discrepancy

FIRE/ATB - APU IN OPERATION DURING FLIGHT DUE TO ATA 24 MEL APPLIED FOR EPC 3 DEGRADED FAULT. DURING CLIMB, SHUDDER FELT IN BACK OF A/C WITH APU FAULT FOLLOWED BY FIRE INDICATION. APU FIRE HANDLE PULLED, BOTTLE DISCHARGED. RETURNED TO MCI. CORRECTIVE ACTION: MAINTENANCE IN PROGRESS.

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