Service difficulty report · Control Valve · Boeing 737890
FAA SDR system
- Difficulty date
- November 24, 2021
- Submitted
- November 30, 2021
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 35691
- Aircraft time
- 48,551 hours, 14,303 cycles
- Part
- Control Valve
- Part number
- 3989083
- Part serial
- 1440
- Condition
- Faulty
- Location
- Left Ecs Bay
- Part time
- 86,061 hours, 43,904 cycles
- Stage of operation
- NR
- How discovered
- V
- 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 ILLUMINATED ON RECALL, EXTINGUISHES WHEN MASTER CAUTION RESET PUSHED. GROUNDED - YES. ACCOMPLISHED PZTC BITE PER B737-800 AMM 21-61-00-700-806-002. VERIFIED LH TCV FAULT ACTIVE. REPLACED LH PACK TCV PER B737-800 AMM 21-51-10. OP CHK AND LEAK CHK GOOD. LH PACK TCV FAULT CLEARED. ALL GROUND TESTS SUCCESSFUL.