What was found
WHILE PERFORMING A PACK, ZONE TEMP CONTROLLER BITE TEST, FOUND THE FLIGHT DECK TAV FAILED ON THE NR 2 CONTROLLER. ACFT GROUNDED. REMOVED AND REPLACED FLIGHT DECK TAV IAW AMM 21-61-21-400-801. OPS AND LEAK CHECKED OK.
- Difficulty date
- May 24, 2017
- Submitted
- May 25, 2017
- Operation
- Air carrier
- Aircraft
- N461AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 36363
- Aircraft time
- 12,663 hours, 4,161 cycles
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Modulating Valve
- Part number
- 3989083
- Part serial
- 10459
- Condition
- Failed
- Location
- Cockpit Temp
- Part time
- 31,983 hours, 10,566 cycles
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.