What was found
RIGHT TCV HAD A RECENT FAULT HISTORY AND CABIN TEMP ISSUES. ACFT GROUNDED. REMOVED AND REPLACED THE RT TEMP CONTROL VALVE IAW AMM 21-51-10/401. PERFORMED BITE TEST IAW AMM 21-51-00-700-803. VALVE FOUND STUCK.
- Difficulty date
- August 31, 2017
- Submitted
- September 5, 2017
- Operation
- Air carrier
- Aircraft
- N431AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 43255
- Aircraft time
- 15,346 hours, 5,062 cycles
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Control Valve
- Part number
- 3989083
- Part serial
- 1659
- Condition
- Stuck
- Location
- Rt Temp
- Part time
- 80,846 hours, 38,063 cycles
- Stage of operation
- CR
- 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.