What was found
CABIN ALTITUDE MASTER WARNING WITH EICAS MESSAGE, LOST CABIN PRESSURE AT 27,000 FEET, PERFORMED AN EMERGENCY DESCENT. REMOVED AND REPLACED APU SURGE CONTROL VALVE IAW AMM 49-53-01. ALL CHECKED GOOD.
- Difficulty date
- February 17, 2018
- Submitted
- February 28, 2018
- Operation
- Air carrier
- Aircraft
- N760CK
- Make and model
- Boeing 767341
- Aircraft serial
- 24753
- Aircraft time
- 85,799 hours, 22,500 cycles
- System (JASC)
- 4950 · APU Bleed Air System
- Part
- Control Valve
- Part number
- 97980612
- Part serial
- 1223C
- Condition
- Malfunctioned
- Location
- Apu
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- G, B
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.