What was found
LEFT A/C PACK LIGHT ILLUMINATES ON MASTER CAUTION RECALL, EXTINGUISHES UPON MC RESET. ACFT GROUNDED. REMOVED AND REPLACED THE LT PACK TRIM AIR MODULATION VALVE ASSY IAW AMM 21-61-21, AND 21-61-00. OPS BITES CHECKED GOOD.
- Difficulty date
- July 30, 2017
- Submitted
- August 3, 2017
- Operation
- Air carrier
- Aircraft
- N453AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 36354
- Aircraft time
- 14,057 hours, 4,622 cycles
- System (JASC)
- 2150 · Cabin Cooling System
- Part
- Control Valve
- Part number
- 3989083
- Condition
- Faulted
- Location
- Lt A/C Pack
- 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.