Service difficulty report · Control Valve · Boeing 737890
FAA SDR system
- Difficulty date
- May 2, 2012
- Submitted
- May 7, 2012
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 35179
- Aircraft time
- 21,979 hours, 6,822 cycles
- Engine
- Cfmint CFM567B27
- Part
- Control Valve
- Part number
- 3989083
- Part serial
- 11901
- Condition
- Failed
- Location
- A/C Bay
- Part time
- 10,401 hours, 3,266 cycles
- Stage of operation
- TX
- 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
RIGHT PACK LIGHT ILLUMINATES WITH MASTER CAUTION RECALL. EXTINGUISHES WITH MASTER CAUTION RESET. ACFT GROUNDED. PERFORMED PACK/ZONE TEMP CONTL BITE REF AMM 21-61-00, RT (NR 2) CONTROLLER HAS "TCV THIS PACK" FAULT ILLUM. RESET BUT SAME FAULT REAPPEARS ON 3 SUCCESSIVE BITE TESTS. SUSPECT BAD RT PACK PRIMARY TCV. REPLACED RT. PACK TEMP CONTROL VALVE REF AMM 21-51-10-000-801. OPS CHECKED GOOD.