What was found
AT FL410 CABIN ALT. LIGHT AND WARNING HORN ACTIVATED. PRESSURIZATION WENT TO AUTO FAIL. MANUALLY CONTROLLED CABIN VIA MANUAL OUTFLOW VALVE OPERATION. GEEN ALT. LIGHT ON PRESS CONTROLLER NEVER ILLUMINATED. R&R HIGH STAGE VALVE PER AMM.
- Difficulty date
- April 7, 2019
- Submitted
- April 8, 2019
- Operation
- Air carrier
- Aircraft
- N908WN
- Make and model
- Boeing 7377H4
- Aircraft serial
- 36620
- Aircraft time
- 39,143 hours, 23,253 cycles
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Valve
- Part number
- 32144464
- Part serial
- 5566
- Condition
- Failed
- Location
- Nr 1 High Stage
- Stage of operation
- CR
- How discovered
- 9
- Nature of condition
- J
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.