# SDR CALA2026070117511

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 30, 2026
- Submitted: July 2, 2026
- Operation: Air carrier
- Aircraft: [N661UA](https://openairdocs.org/aircraft/N661UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 27158
- Aircraft time: 127,110 hours, 19,291 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Valve
- Part number: 79275516
- Part serial: 525
- Condition: Faulted
- Location: Lt Engine
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026070117511

## Discrepancy

LEFT ENG PRV EICAS MSG FLASHED AFTER TAKEOFF. L ENG PRV STATUS MSG ON FOR REST OF FLIGHT.   FOUND LEFT PRV AND PRC FAULT LIGHTS. PERFORMED PRV-PRC SYSTEM HEALTH CHECK IAW AMM 36-00-99-705-160, FOUND PRC NOT REGUATING AT ANY REGULATED PRESSURES.  REMOVED AND REPLACED LT PRC IAW AMM 36-11-19/401 CONFIG 3, OPS CHECKED NORMAL. NO LEAKS NOTED.   RAN ENG 1 IAW AMM 71-00-00-501 AT GROUND IDLE & LT ENG BLEED OPS NORMAL . LT ENG PRV STATUS MSG NOT DISPLAYED.

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