# SDR UIEA2020092512029

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 21, 2020
- Submitted: September 25, 2020
- Operation: Air carrier
- Aircraft: [N645GT](https://openairdocs.org/aircraft/N645GT), registered now
- Make and model: Boeing 767324
- Aircraft serial: 27393
- Aircraft time: 99,688 hours, 19,177 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Indication Sys
- Condition: Malfunctioned
- Location: Lt Hpsov
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2020092512029

## Discrepancy

LEFT HPSOV CLOSED AND OPEN SWITCHES DISAGREE.  CHECKED TERMINAL CONDITION AT HPSOV, FOUND OK.  CHECKED WIRING, PER WDM 36-11-61.  WIRING CHECKED OK.  PERFORMED OPERATION TEST AIR SUPPLY DISTRIBUTION SYS OK, PER AMM 36-11-00-715.  ENG LEFT RUN UP OK, NO MSG, PER AMM 71-00-00.

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