What was found
NR 1 ENG PRSOV GOES TO FULL OPEN WHEN APU AIR IS APPLIED. GROUNDED - YES. REMOVED AND REPLACED THE NR 1 ENG PRSOV, REF B737-900 AMM 36-11-04. OPS CK AND LEAK CK GOOD. ETOPS GROUND VERIFICATION WAS SUCCESSFUL, SEAMC DAVE NOTIFIED.
- Difficulty date
- August 31, 2020
- Submitted
- September 2, 2020
- Operation
- Air carrier
- Aircraft
- N423AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 35206
- Aircraft time
- 27,508 hours, 8,825 cycles
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Bleed Valve
- Part number
- 32145526
- Part serial
- 18660
- Condition
- Inoperative
- Location
- Nr 1 Engine
- Part time
- 11,886 hours, 3,763 cycles
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.