Service difficulty report · Control Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- March 2, 2019
- Submitted
- March 5, 2019
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 61620
- Aircraft time
- 11,930 hours, 3,854 cycles
- Part
- Control Valve
- Part number
- 3989085
- Part serial
- 20359
- Condition
- Failed
- Location
- Ac Bay
- Part time
- 17,726 hours, 6,589 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, LT PACK LIGHT STAYS ILLUMINATED. LIGHT EXTINGUISHED W/ MASTER CAUTION RESET. GROUNDED - YES. REL PER MEL 21-32B. LEFT PACK PRIMARY TEMP CONT INOP. PERFORMED PFTC BITE REF AMM 21-61-00-740-801-002 ON LT PFTC, FAULT IS TCV. REMOVED AND REPLACED TCV REF AMM 21-51-10. LEAK CHECK GOOD, ETOPS GROUND VERIFICATION SUCCESSFUL. PFTC PASSED REF AMM 21-61-00. THIS CLEARS MEL 21-32B.