What was found
LEFT PACK LIGHT ILLUMINATES ON RECAL. EXTINGUISHES WHEN MASTER CAUTION IS PRESSED. GROUNDED - YES. REMOVED AND REPLACED L/H TEMP CONTROL VALVE PER TSR ACTION REMOVED THE FAULT, NO SPECIAL MAINTENANCE PROCEDURES NEEDED TO BE REVERSED.
- Difficulty date
- November 9, 2019
- Submitted
- November 13, 2019
- Operation
- Air carrier
- Aircraft
- N472AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 60580
- Aircraft time
- 18,464 hours, 5,906 cycles
- System (JASC)
- 2150 · Cabin Cooling System
- Part
- Control Valve
- Part number
- 3989085
- Part serial
- 2545
- Condition
- Failed
- Location
- Lt A/C Pack
- Part time
- 74,860 hours, 33,195 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.