What was found
CONT ZONE TEMP CAUTION LIGHT ILLUMINATED DURING INITIAL CLIMB PERFORMED QRH LIGHT ILLUMINATED DURING MASTER CAUTION RECALL. GROUNDED - YES. REMOVED AND REPLACED CONTROL ZONE TEMP MODULATING VALVE PER B737-800 AMM 21-61-21/401.
- Difficulty date
- February 23, 2023
- Submitted
- February 27, 2023
- Operation
- Air carrier
- Aircraft
- N534AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35202
- Aircraft time
- 44,917 hours, 12,859 cycles
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Valve
- Part number
- 3989085
- Part serial
- 20258
- Condition
- Faulty
- Location
- Left Ecs Bay
- Part time
- 31,033 hours, 9,672 cycles
- Stage of operation
- CL
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.