Service difficulty report · Control Valve · Boeing 737890
FAA SDR system
- Difficulty date
- September 11, 2019
- Submitted
- September 13, 2019
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 35184
- Aircraft time
- 47,453 hours, 14,405 cycles
- Part
- Control Valve
- Part number
- 3989083
- Part serial
- 13899
- Condition
- Failed
- Location
- Ac Bay
- Part time
- 33,177 hours, 10,674 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK LIGHT ILLUMINATES DURING RECALL AND EXTINGUISHES DURING MASTER CAUTION RESET. GROUNDED - YES. REMOVED & REPLACED TCV2 REF AMM 21-51-10, RT PACK/ZONE TEMP CONTROLLER BITE TEST & LK TEST NML REF AMM 21-61-00-700-806-002. PULLED & RESET 3 TOTAL C/BS. TCV2 SHOWS EVIDENCE OF EXCESSIVE OVERHEATING. LT SIDE SHOWS NO FAULTS.