What was found
LEFT ENGINE BLEED VALVE DOES NOT CLOSE WITH SWITCH OFF. DUCT PRESSURE DROPS 5 PSI WITH SWITCH OFF. REPLACED PRSOV REGULATOR REF AMM. RAN ENGINE OPEN AND CLOSED PRSOV SEVERAL TIMES, OP CHECKED GOOD.
- Difficulty date
- April 3, 2012
- Submitted
- April 5, 2012
- Operation
- Air carrier
- Aircraft
- N551UA
- Make and model
- Boeing 757222
- Aircraft serial
- 25399
- Aircraft time
- 77,224 hours, 22,382 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Regulator
- Part number
- S212N1023
- Part serial
- 678
- Condition
- Faulty
- Location
- Bleed System
- Stage of operation
- TX
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.