# SDR UIEA2018041000649

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 9, 2018
- Submitted: April 10, 2018
- 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: 93,350 hours, 18,572 cycles
- System (JASC): [4950 · APU Bleed Air System](https://openairdocs.org/jasc/4950)
- Part: Isolation Valve
- Condition: Malfunctioned
- Location: Apu Bleed Air
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2018041000649

## Discrepancy

NO APU AIR PRESURE WITH APU RUNNING.  RESEATING THE CIRCUIT BREAKER CLEARED THE MESSAGE. REACTIVATED CENTER ISOLATION VALVE IAW AMM 36-11-11. PNEUMATIC PRESSURE READS NORMAL.

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