What was found
CONT CABIN ZONE TEMP ILLUMINATED ON MASTER CAUTION CHECK. GROUNDED - YES. REMOVED AND REPLACED CONTROL CABIN TRIM MODULATION VALVE IAW AMM 21-61-21-/401, OPS CHECK GOOD, ETOPS GROUND FUNCTIONAL CHECK GOOD IAW AMM 21-61-00-700-806-002.
- Difficulty date
- May 22, 2019
- Submitted
- May 23, 2019
- Operation
- Air carrier
- Aircraft
- N493AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41727
- Aircraft time
- 12,223 hours, 4,073 cycles
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Modulating Valve
- Part number
- 3989085
- Part serial
- 25068
- Condition
- Inoperative
- Location
- Ac Bay
- Part time
- 13,907 hours, 4,551 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.