Service difficulty report · Control Valve · Boeing 737890
FAA SDR system
- Difficulty date
- December 23, 2015
- Submitted
- December 29, 2015
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 41188
- Aircraft time
- 14,276 hours, 4,192 cycles
- Part
- Control Valve
- Part number
- 3989085
- Part serial
- 1612
- Condition
- Malfunctioned
- Location
- Nr 2 A/C Pack
- Part time
- 67,370 hours, 36,785 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.
What was found
ON RECALL CONTROLLER CABIN ZONE TEMP ILLUMINATED AND RESETS WITH PUSHING MASTER CAUTION. ACFT GROUNDED. CONFIRMED FAULT, NR 2 PACK/ZONE TEMPERATURE CONTROLLER SHOWS NUMEROUS FAULT INDICATIONS, TCV 2, V143, AND FLT DECK ZONE. REPLACED NR 2 PACK/ZONE TEMP CONTROLLER REF AMM TASK 21-61-20. ALL PASSES EXCEPT V143 FLT DECK TCV. REPLACED FLT DECK TCV REF AMM TASK 21-61-21. GROUND FUNCTIONAL CHECK AND PACK/ZONE TEMP CONTROLLER BITE TEST REF AMM 21-61-00-700-806-002, OPS CHECK NORMAL.