What was found
DURING CROSSOVER TEST OF THE #1 ENGINE DUCT PRESSURE AT 30% AT 40# N1, LOW BY 10%. GROUNDED - YES. REMOVED AND REPLACED PRSOV REF B737-900 AMM 36-11-04, LEAK AND OPS CHECK GOOD.
- Difficulty date
- April 14, 2019
- Submitted
- April 15, 2019
- Operation
- Air carrier
- Aircraft
- N431AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 43255
- Aircraft time
- 21,792 hours, 7,157 cycles
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Shutoff Valve
- Part number
- 32145526
- Part serial
- 4052
- Condition
- Failed
- Location
- Bleed Crossover
- Part time
- 74,339 hours, 32,079 cycles
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.