- Difficulty date
- December 24, 2020
- Submitted
- December 29, 2020
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 36361
- Aircraft time
- 24,751 hours, 7,994 cycles
- Part
- Valve
- Part number
- 3989085
- Part serial
- 25499
- Condition
- Inoperative
- Location
- Lt A/C Pack
- Part time
- 18,045 hours, 5,825 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
ZONE TEMP (CONT CAB) ILLUMINATED ON RECALL. EXTINGUISHES WITH MASTER CAUTION RESET. GROUNDED-YES. CONFIRMED FAULT, CONT CAB ZONE LIGHT ILLUMINATES ON RECALL. NR 2 PACK/ZONE TEMP CONTROLLER SHOWS HARD FAIL FLIGHT DECK TCV (V143). REMOVED & REPLACED TCV, REF B737-900 AMM 21-61-21. LEAK CHECK & OPERATIONS CHECK NORMAL, REF AMM 21-61-00-700-806-002.