- Difficulty date
- March 13, 2023
- Submitted
- March 15, 2023
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 35176
- Aircraft time
- 61,231 hours, 17,800 cycles
- Part
- Unknown
- Part number
- UNKNOWN
- Condition
- Unknown
- Location
- Unknown
- Stage of operation
- TX
- 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.
What was found
AFTER START CONT CABIN ZONE TEMP LIGHT ON RECALL (RESETS WITH MASTER CAUTION RESET). GROUNDED - YES. PERFORMED PZTC BITE REF B737-800 FIM 21-62 TASK 801. #2 CONTROLLER FAULTED FLIGHT DECK TRIM VALVE. FOUND FLIGHT DECK TEMP SENSOR DIRTY. CLEANED SENSOR REF B737-800 AMM 21-61-10. OPERATED BOTH PACK SYSTEMS. RE-PERFORMED PZTC BITE. FAULT NO LONGER ACTIVE.