# SDR UIEA2017072501307

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 25, 2017
- Submitted: July 26, 2017
- Operation: Air carrier
- Aircraft: [N649GT](https://openairdocs.org/aircraft/N649GT), registered now
- Make and model: Boeing 767375
- Aircraft serial: 25864
- Aircraft time: 84,791 hours, 22,023 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Shutoff Valve
- Part number: 799801479275515
- Part serial: 97090969910116
- Condition: Malfunctioned
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2017072501307

## Discrepancy

SIGNIFICANT DUCT PRESSURE DIFFERENCE BETWEEN LEFT AND RIGHT.  AT 91% N1 DURING CRUISE FLT.   LEFT DUCT AT 37 AND RIGHT 9.  PERFORMED FIM 36-10 FT 838, REMOVED AND REPLACED PRSOV IAW AMM 36-11-09/501, AND PRVC IAW AMM 36-11-18/501, BOTH OPS TEST NORMAL ON ENGINE RUN UPS.

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