Service difficulty report · Control Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- June 1, 2022
- Submitted
- June 3, 2022
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44108
- Aircraft time
- 24,468 hours, 7,565 cycles
- Part
- Control Valve
- Part number
- 3989085
- Part serial
- 5715
- Condition
- Leaking
- Location
- Right Ecs Bay
- Part time
- 1,968 hours, 562 cycles
- Stage of operation
- NR
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK ILLUMINATED ON RECALL, RESET ON MASTER CAUTION. GROUNDED - YES. ACCOMPLISHED PACK/ZONE TEMP CONTROLLER BITE TEST REF B737-900 AMM 21-61-00. #2 CONTROLLER SHOWS PREVIOUS FLT FAULT ON INLET SRADA. VERIFY TESTS SHOWS OPS CHECK GOOD. RAN R PACK 1 HOUR, NO FAULTS. INSPECTED R HEAT EXCHANGER, NO FAULTS NOTED. FOUND TCV V141 LEAKING OIL. REMOVED AND REPLACED REF AMM 21-51-10. OPS CHECK GOOD.