What was found
CABIN ALTITUDE WARNING HORN ACTIVATED DURING FLIGHT NEAR TOP OF DESCENT. DECLARED EMERGENCY. R & R THE NR 1 ENGINE HIGH STAGE VALVE IAW AMM.
- Difficulty date
- March 15, 2018
- Submitted
- March 20, 2018
- Operation
- Air carrier
- Aircraft
- N404WN
- Make and model
- Boeing 7377H4
- Aircraft serial
- 27892
- Aircraft time
- 58,979 hours, 34,476 cycles
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Valve
- Part number
- 32144464
- Part serial
- P113C
- Condition
- Leaking
- Location
- Nr 1 Engine
- Stage of operation
- DE
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.