What was found
WHILE PERFORMING T/C NG-36WC-00001 (#1 ENG BLEED AIR HEALTH CHECK) FOUND THAT THE HIGH STAGE VALVE REGULATOR FAILED OPS CHECK. GROUNDED - YES. REPLACED THE HIGH STAGE REGULATOR REF B737-900 AMM 36-11-07-400-801 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
- Regulator
- Part number
- 1074847
- Part serial
- 10105
- Condition
- Failed
- Location
- Nr 1 High Stage
- Part time
- 39,933 hours, 13,373 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.