What was found
MAINT LIGHT ON AFT OVERHEAD PANEL ILLUMINATED. GROUNDED - YES. PERFORMED AIR COND SYS TEST LEFT, FOUND FAULT 21-55090 LEFT TCV OUT OF RANGE. REPLACED LEFT PACK TCV IAW B737-9 AMM 21-51-10/401. OPS CHKD GOOD SYS TEST PASS.
- Difficulty date
- July 10, 2022
- Submitted
- July 18, 2022
- Operation
- Air carrier
- Aircraft
- N973AK
- Make and model
- Boeing 7379
- Aircraft serial
- 43346
- Aircraft time
- 889 hours, 270 cycles
- System (JASC)
- 2150 · Cabin Cooling System
- Part
- Modulating Valve
- Part number
- 3989085
- Part serial
- 34764
- Condition
- Out Of Adjust
- Location
- Left Ecs Bay
- Part time
- 976 hours, 297 cycles
- Stage of operation
- NR
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.