What was found
CONT CABIN ZONE TEMP ON RECALL. GROUNDED - YES. REMOVED AND REPLACED TRIM AIR MODULATING VALVE OPS CHECK GOOD. REF B737-900 AMM 21-61-21/401
- Difficulty date
- April 5, 2021
- Submitted
- April 7, 2021
- Operation
- Air carrier
- Aircraft
- N493AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41727
- Aircraft time
- 18,281 hours, 5,857 cycles
- Engine
- Cfmint CFM567B27E
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Modulating Valve
- Part number
- 3989085
- Part serial
- 24422
- Condition
- Faulty
- Location
- Lt Ecs
- Part time
- 19,395 hours, 6,155 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.