- Difficulty date
- February 12, 2023
- Submitted
- February 16, 2023
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 40715
- Aircraft time
- 28,317 hours, 8,880 cycles
- Part
- Valve
- Part number
- 3989085
- Part serial
- 20129
- Condition
- Overheated
- Location
- Left Ecs Bay
- Part time
- 33,750 hours, 10,542 cycles
- Stage of operation
- TX
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- D
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATED AFTER ENGINE START AND WOULD NOT RESET. GROUNDED - YES. CONFIRMED FAULT, FOUND TCV-1 (V139) OVERHEATED. REMOVED & REPLACED TCV1 REF B737-900 AMM 21-51-10. PULLED & RESET 1 TOTAL C/B. ACCOMPLISHED PACK/ZONE TEMP CONTROLLER BITE REF AMM 21-61-00-700-806-002, OPS CK NORMAL.