# SDR NACA2025121700001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 17, 2025
- Submitted: January 13, 2026
- Operation: Air carrier
- Aircraft: [N563NC](https://openairdocs.org/aircraft/N563NC), registered now
- Make and model: Boeing 767-3BG
- Registry model: [Boeing 767-3BG](https://openairdocs.org/model/boeing-767-3bg) (OpenAirDocs)
- Aircraft serial: 30563
- Aircraft time: 86,717 hours, 22,239 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Shutoff Valve
- Condition: Stuck
- Location: Apu
- Stage of operation: IN
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/NACA2025121700001

## Discrepancy

APU ECU SELF TEST SHOWS FAULT - IGV ACT.  PERFORMED APU ECU BITE TEST IAW AMM 49-61-05-742-045. NO FAULTS FOUND.  BITE TEST PASSED. FOUND APU SHUTOFF VALVE STUCK IN CLOSED POSITION. RELEASED THE VALVE,  SYSTEM CHECKED OK IAW AMM 49-11-00-802-002.

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