What was found
DIVERSION, JUST PRIOR TO LEVEL OFF LEFT "PACK TRIP OFF" ILLUMINATED. STARTED EMERGENCY DECENT. CABIN ALTITUDE WARNING HORN SOUNDED. FOUND PRECOOLER CONTROL VALVE STUCK CLOSED. R&R RIGHT ENGINE PRECOOLER CONTROL VALVE PER AMM.
- Difficulty date
- August 16, 2018
- Submitted
- August 21, 2018
- Operation
- Air carrier
- Aircraft
- N224WN
- Make and model
- Boeing 7377H4
- Aircraft serial
- 32493
- Aircraft time
- 45,102 hours, 26,660 cycles
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Control Valve
- Part number
- 332895625
- Part serial
- 6800
- Condition
- Stuck
- Location
- Bleed Air Sys
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.