# SDR UIEA2021052401170

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 21, 2021
- Submitted: May 28, 2021
- Operation: Air carrier
- Aircraft: [N1997A](https://openairdocs.org/aircraft/N1997A), registered now
- Make and model: Boeing 767-33A
- Registry model: [Boeing 767-33A](https://openairdocs.org/model/boeing-767-33a) (OpenAirDocs)
- Aircraft serial: 27310
- Aircraft time: 100,300 hours, 20,891 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Switch
- Part number: 233T3100319
- Condition: Failed
- Location: Apu
- 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/UIEA2021052401170

## Discrepancy

APU SWITCH SHOWS INCORRECT CONFIGURATION "OFF" WHEN IT SHOULD BE "VALVE".  REMOVED AND REPLACED APU BLEED KORRY SWITCH IAW SWPM 20-84-13. OPS CHECK GOOD. VALVE INDICATION PRESENT.

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