What was found
#2 ENGINE PRECOOLER CONTROL VALVE FAILED HEALTH CHECK. (ASA T/C N8436002). GROUNDED - YES. REPLACED #2 PRECOOLER CONTROL VALVE, LEAK/OPC CHECK OK. REF B737-900 AMM 36-12-02-400-801.
- Difficulty date
- December 27, 2022
- Submitted
- December 28, 2022
- Operation
- Air carrier
- Aircraft
- N464AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 40714
- Aircraft time
- 32,713 hours, 10,156 cycles
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Control Valve
- Part number
- 632921461
- Part serial
- 3574
- Condition
- Failed
- Location
- Nr 2 Precooler
- Part time
- 12,761 hours, 3,710 cycles
- Stage of operation
- IN
- How discovered
- C
- Nature of condition
- L
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.