- Difficulty date
- October 5, 2019
- Submitted
- October 8, 2019
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 36482
- Aircraft time
- 40,486 hours, 12,022 cycles
- Part
- Valve
- Part number
- 3989083
- Part serial
- 7067
- Condition
- Overheated
- Location
- Lt A/C Bay
- Part time
- 51,450 hours, 24,644 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- M, J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ZONE TEMP FLT DECK (CONT CAB) ILLUMINATED ON RECALL, EXTINGUISHES ON MASTER CAUTION RESET. GROUNDED - YES. CONFIRMED FAULT, "CONT CAB" ZONE TEMP LIGHT COMES ON EVERYTIME, RECALL PRESSED. R/H PACK/ZONE TEMP CONTROLLER SHOWS HARD FAIL "FLT DECK TCV" (V143). GVI V143, SHOWS OVERHEATING. L/H SIDE OK. REMOVED & REPLACED "FLT DECK TCV" REF B737-800 AMM 21-61-21. ACCOMPLISHED R/H PACK/ZONE TEMP CONTROLLER BITE REF AMM 21-61-00-700-806-002, LK CK & OPS CK NML.