Service difficulty report · Control Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- November 8, 2018
- Submitted
- November 14, 2018
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 36352
- Aircraft time
- 18,832 hours, 6,217 cycles
- Part
- Control Valve
- Part number
- 3989083
- Part serial
- 11358
- Condition
- Failed
- Location
- Rt A/C Pack
- Part time
- 34,747 hours, 11,055 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
DURING MASTER CAUTION RECALL, RIGHT PACK ANNUNCIATOR ILLUMINATED, LIGHT EXTINGUISHED DURING MASTER CAUTION RESET. GROUNDED - YES. CONFIRMED FAULT, #2 PACK/ ZONE TEMP CONTROLLER BITE SHOWS HARD FAIL TCV #2 (V141). GVI TCV #2 SHOWS EVIDENCE OF OVERHEATING/ LEAKING OIL. REMOVED & REPLACED TCV #2 REF B737-900 AMM 21-51-10, LK CK & OPS CK NML REF AMM 21-61-00-700-806-002. AIRCRAFT RELEASED FROM MEL 21-32B.