Study Guide Questions Flashcards
APU guaranteed Start up
39,000 ft
(May start up to 43,000 ft,
Max Operating ALT 45,000 ft)
What design features help guarantee an APU Airstart
1) Heated Oil Sump
2) Bleed Air Augmentation Valve
(Delays start for 15 sec when above 35,000 ft)
When does the APU generator come “online”
Once Reaching 99% RPM for 2 sec
When is APU bleed air available?
After reaching 100% for 1 min
APU bleed air for T/O is usable up to
1,500 ft AGL
What is the shutdown sequence for the APU below 20,000 ft?
1) It load-sheds Immediately
2) It Slowly winds down to 70% RPM over 1 min, then shuts-down
What is the shutdown sequence for the APU above 20,000 ft?
1) It load-sheds Immediately
2) Stays at 100% RPM for 1 min, then shuts-down
APU Max TGT for start
1050 C
APU Started cuts out at
46% RPM
APU fuel comes from
Left Tank
Can you start the APU with external DC power?
Yes (but multiple start attempts require 15 min between starts)
How many MAUs (Modular Avionics Unit) do we have
3 (16 Cards per MAU)
What do AGMs (Advanced Graphics Modules) do?
They take Data and create the images you see on the DUs (Display Units 1-4)
Where do the DUs get their power from
DU1 - Left ESS DC
DU2 - Left Main DC
DU3 - Right Main DC
DU4 - Right ESS DC
DUs 1 & 4 can be powered by
HMG if you have dual gen and APU gen failure
What is the Color of your Track (on Moving Map) until you reach the waypoint?
Magenta
What is the dotted Magenta Line?
Aircraft IRS track
On the PFD, speed and altitude have a “trend vector.” that gives a __ forecast.
6 sec
What is needed for In-Flight alignment?
1 GPS
Water tank capacity
30 gal
What is needed for a No-Break Power Transfer
An IDE must be part of the transfer
(An
Using the HMU (hydraulic Motor Generator)
Use other Hydro systems/controls slowly (speed brake - 3 sec to open or close)
When airborne, where does the GSB (ground service Bus) get its power
Right Main DC Bus
What do the TRUs do?
Convert AC power to DC
(there are 5 of them
L ESS
L Main
Aux TRU
R Main
R ESS)
