What was found
LEFT HIGH STAGE PRESSURE SYSTEM WOULD NOT OPERATE AT IDLE UNTIL POWER IS INCREASED. ISSUE WAS FOUND DUE TO A FAULTY HPSOV AND HP PILOT. THIS SDR REPORTS THE HP PILOT, THE HPSOV WAS PREVIOUSLY REPORTED ON A SEPARATE SDR.
- Difficulty date
- May 22, 2021
- Submitted
- June 6, 2021
- Operation
- Air carrier
- Aircraft
- N757QM
- Make and model
- Boeing 75729J
- Aircraft serial
- 27203
- Aircraft time
- 61,996 hours, 33,134 cycles
- Engine
- Pwa PW2037
- Engine time
- 55,095 hours, 19,316 cycles
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Pilot Valve
- Part number
- 33990047
- Part serial
- 1002C
- Condition
- Faulted
- Location
- Lt Engine
- Stage of operation
- TX
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.