787 SYS 3 Engines/APU Flashcards
For ground starts, auto start system ABORTS start for
-Loss of both starters
-No N1 rotation
-No oil pressure rise
For ground starts, auto start system attempts to correct for
-loss of 1 Starter
-Compressor Stall
-High residual EGT
-Hot Start
-Hung Start
-No EGT rise
-Time limit
What’s the difference between APU attended vs unattended modes
In attended
-High EGT
-High Oil Temp
-Low Oil P
Let’s APU keep running and only gives APU LIMIT EICAS
In what Flight Control mode (normal/secondary/direct) is TAP (Thrust Asym Prot) available
Normal
The APU battery is designed to support __ consecutive start attempts. If it doesn’t start after 2 what do you do
-2
-give 5 minute cooldown before 3rd attempt
When does the APU AUTO Start
Inflight with the loss of 3 or more Engine generators
1) Red Line Red
2) Reference/Target Green
3) commanded
4) Commanded Sector
5) Max N1 Amber-Max Rated Thrust
If the secondary indications auto display, how do you clear them from display
1) Condition is resolved
2) press ENG on DSP
What are the altitudes and timing for the ICI (Ice Crystal Icing) function of the EEC
-Logic activates above 30,000 ft
-Active for 30 min with 15 min adds after
-Terminates below 28,500’
What does this light mean
1) APU fault and/or fire
2) APU has shutdown due to APU fault/fire
3) Momentarily during APU controller self test
How long after starting the Left motor start sequence is required to select the right start switch
5 seconds
When does APU starter cutout
50%
When will APU RUNNING EICAS memo message display
2 seconds after APU reaches 95% of target speed
If the APU auto starts due to a valid condition what is the only way to shut it down
Pull the APU fire handle
