Service difficulty report · Modulating Valve · Boeing 737890
FAA SDR system
- Difficulty date
- March 8, 2023
- Submitted
- March 13, 2023
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 35191
- Aircraft time
- 53,059 hours, 15,708 cycles
- Part
- Modulating Valve
- Part number
- 3989085
- Part serial
- 26913
- Condition
- Faulted
- Location
- Lt Ecs Bay
- Part time
- 20,352 hours, 6,792 cycles
- Stage of operation
- NR
- 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
"ZONE TEMP" MASTER CAUTION ON CONT. CAB. RESETS WITH MASTER CAUTION RESET. GROUNDED - YES. REMOVED AND REPLACED FLIGHT COMPARTMENT ZONE TRIM AIR MODULATING VALVE REF B737-800 AMM 21-61-21OPS CHECK GOOD, BITE CHECK GOOD. NO DEFECTS NOTED.