Service difficulty report · Control Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- June 1, 2022
- Submitted
- June 3, 2022
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41728
- Aircraft time
- 23,088 hours, 7,225 cycles
- Part
- Control Valve
- Part number
- 3989083
- Part serial
- 9186
- Condition
- Faulty
- Location
- Right Ecs Bay
- Part time
- 53,082 hours, 15,728 cycles
- Stage of operation
- IN
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TROUBLESHOOTING PER B737-900 FIM 21-33 TASK 802 FOR CABIN RATE OF CLIMB FLUCTUATION REF LP# 60269168 REQUIRES REPLACEMENT OF R/H TEMP CONTROL VALVE. GROUNDED - YES. REMOVED & REPLACED R/H TEMP CONTROL VALVE, REF B737-900 AMM TASK 21-51-10-000-801 & 21-51-10-400-801. LK CK & OPS CK GOOD.