787 Systems

Question 1

When will the APU automatically start?

Answer 1

With loss of three or more engine generators.

Question 2

What 5 events will cause the RAT to automatically deploy?

Answer 2

1. Both engines have failed
2. All 3 hydraulic system pressures are low
3. Loss of all electrical power to both flight instrument displays
4. Loss of all 4 EMP’s and a flight control failure on approach
5. Loss of all 4 EMP’s and an engine failure on takeoff or landing