# SDR 2025FA0000580

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 26, 2025
- Submitted: August 26, 2025
- Operation: General aviation
- Aircraft: [N540SF](https://openairdocs.org/aircraft/N540SF), registered now
- Make and model: Bolkms BK117D3
- Aircraft serial: 21230
- Aircraft time: 979 hours, 2,480 cycles
- System (JASC): [5247 · Auxiliary Power Unit (APU) Doors](https://openairdocs.org/jasc/5247)
- Part: Door
- Part number: B533K5672201
- Condition: Open
- Location: Epu
- Part time: 979 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2025FA0000580

## Discrepancy

EPU DOOR OPENED IN FLIGHT.  ADVISORY CAUTION WAS NOTED.  MADE PRECAUTIONARY LANDING AND CLOSED THE DOOR NO FURTHER ACTIONS NEEDED.

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