Service difficulty report · Control Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- November 19, 2018
- Submitted
- November 27, 2018
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41730
- Aircraft time
- 24,119 hours, 7,943 cycles
- Part
- Control Valve
- Part number
- 3989085
- Part serial
- 20980
- Condition
- Failed
- Location
- Rt A/C Pack
- Part time
- 15,898 hours, 5,885 cycles
- Stage of operation
- DE
- 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
PRIOR TO DESCENT MASTER CAUTION AIR COND R PACK LIGHT EXTINGUISHED CHECK LIGHT NO FURTHER ACTION. GROUNDED - YES. CONFIRMED FAULT R/H PACK/ZONE TEMP CONTROLLER BITE SHOWS HARD FAIL FLIGHT DECK TCV (V143) & INTERMITTENT R/H RAM AIR INLET ACTUATOR FAULT. REMOVED & REPLACED FLIGHT DECK TCV & R/H RAM AIR INLET ACTUATOR REF B737-900 AMM 21-61-21 & AMM 21-51-21, LK CK & OPS CK NML REF AMM 21-61-00-700-806-002.