Service difficulty report · Modulating Valve · Boeing 737890
FAA SDR system
- Difficulty date
- November 17, 2022
- Submitted
- November 21, 2022
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 35691
- Aircraft time
- 51,697 hours, 15,194 cycles
- Part
- Modulating Valve
- Part number
- 3989083
- Part serial
- 10415
- Condition
- Faulty
- Location
- Left Ecs Bay
- Part time
- 50,364 hours, 15,175 cycles
- Stage of operation
- TX
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER START ZONE TEMP CONT CAB LIGHT ILLUMINATED. EXTINGUISHES ON MASTER CAUTION RESET. GROUNDED - YES. REMOVED AND REPLACED THE CONTROL CABIN TAV V143 REF B737-800 AMM 21-61-21, PERFORMED REPAIR CONFIRMATION OPS CHECK SUCCESSFUL, ETOPS SUCCESSFUL GROUND VERIFICATION.