What was found
FLIGHT 7820, ENROUTE GTF-MSO EXCESS CABIN ALTITUDE ALERT/WARNING LIGHT ILLUMINATED IN FLIGHT. AFTER EXTENSIVE TROUBLESHOOTING, MAINTENANCE REPLACED THE #1 ACM AND TIC VALVE. ALL CHECKS GOOD.
- Difficulty date
- July 30, 2025
- Submitted
- July 31, 2025
- Operation
- Air carrier
- Aircraft
- N901FX
- Make and model
- Aerosp ATR42320
- Aircraft serial
- 172
- Aircraft time
- 35,328 hours, 38,245 cycles
- System (JASC)
- 2130 · Cabin Pressure Control System
- Part
- Acm
- Part number
- 22044005
- Part serial
- 101621R
- Condition
- Seized
- Location
- Nr 1
- Stage of operation
- CR
- 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.