Service difficulty report · Control Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- January 25, 2019
- Submitted
- January 29, 2019
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 36363
- Aircraft time
- 19,348 hours, 6,312 cycles
- Part
- Control Valve
- Part number
- 3989085
- Part serial
- 23927
- Condition
- Failed
- Location
- Ac Bay
- Part time
- 14,771 hours, 4,821 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
LEFT PACK ILLUMINATED, EXTINGUISHES UPON MASTER CAUTION RESET. GROUNDED - YES. PERFORMED PACK/ZONE TEMP CONTROLLER BITE REF AMM 21-61-00. INDICATED LT TEMP CONTROL VALVE INOP. REMOVED AND REPLACED LT TCV REF AMM 21-51-10. BITE CHECK AND LEAK CHECK GOOD. LT PACK LIGHT NO LONGER ILLUMINATED ON RECALL.