Service difficulty report · Control Valve · Boeing 737890
FAA SDR system
- Difficulty date
- May 15, 2016
- Submitted
- May 17, 2016
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 35200
- Aircraft time
- 21,167 hours, 6,156 cycles
- Part
- Control Valve
- Part number
- 3989083
- Part serial
- 15012
- Condition
- Failed
- Location
- Temp
- Part time
- 21,181 hours, 6,160 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
LEFT PACK LIGHT ON RECALL AFTER START. ACFT GROUNDED. VERIFIED FAULT. ACCOMPLISHED PACK/ZONE TEMP CONTROLLER BITE TEST, CONTROLLER NR 1 SHOWS TCV FAULT FOR LT PACK. CONTROLLER NR 2 SHOWS NO FAULTS. ACFT REQUIRES TEMP CONTROL VALVE, V139 REF AMM 21-61-00-700-806-002. REPLACED TCV FOR LT PACK REF AMM 21-51-10. PERFORMED BITE CHECK ON TEMP CONTROLLER, NO FAULTS. OPS CKECK NORMAL, LEAK CHECK GOOD. CLEARED MEL 21-32B.