What was found
LEFT PACK LIGHT ILLUMINATED DURING MASTER CAUTION RECALL (AFTER START CHECKLIST). GROUNDED-YES. REMOVED AND REPLACED LEFT PACK TEMP CONTROL VALVE, IAW B737-900 AMM 21-51-10. OPERATIONS AND LEAK CHECK GOOD.
- Difficulty date
- December 25, 2020
- Submitted
- December 29, 2020
- Operation
- Air carrier
- Aircraft
- N431AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 43255
- Aircraft time
- 27,205 hours, 8,774 cycles
- System (JASC)
- 2150 · Cabin Cooling System
- Part
- Control Valve
- Part number
- 3989085
- Condition
- Inoperative
- Location
- Lt A/C Pack
- Stage of operation
- TX
- How discovered
- 9
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.