What was found
L PACK LIGHT ILLUMITS ON RECALL AFTER START. GOES OUT WITH MASTER CAUTION. GROUNDED - YES. REMOVED & REPLACED LH PACK TRIM MODULATING VALVE REF B737-900 AMM 21-61-21-400-801. LEAK CK GOOD PER THE SAME.
- Difficulty date
- November 13, 2021
- Submitted
- November 16, 2021
- Operation
- Air carrier
- Aircraft
- N442AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 43293
- Aircraft time
- 29,893 hours, 9,558 cycles
- System (JASC)
- 2150 · Cabin Cooling System
- Part
- Modulating Valve
- Part number
- 3989085
- Part serial
- 24593
- Condition
- Inoperative
- Location
- Left Ecs Bay
- Part time
- 10,545 hours, 3,846 cycles
- Stage of operation
- TX
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.