Systems: Crew Alerting and Warning Flashcards
What is the primary component of the avionics integration system?
2 IC-600 Symbol Generators
The #1 Data Acquisition Unit (DAU) provides data for which engine and airplane systems?
DAU #1 is dedicated to collect data from the forward airplane systems and #1 engine. Engine data is sent to the DAUs through the FADECs and directly from the engine sensors.
The #2 DAU provides data for which engine and airplane systems?
DAU 2 is dedicated to collect data from the aft airplane systems and engine #2.
What are the primary and secondary channels of the DAU and what are their functions?
Each DAU is a dual channel unit with a primary (A) and backup (B) channel, high are pilot selectable through the DAU reversionary button. In the event of a primary channel failure, an EICAS message will be generated DAU 1(2) A FAIL and some engine information and system data will be missing from the EICAS. Per the QRH, th channel B will be selected through the DAU reversionary button and some info will be recovered.
Which unit can be used as a backup display to the main display panels?
The RMUs
How many systems pages can be displayed on the MFD?
5 Fuel Electrical Environmental and Ice Protection Hydraulic and Brakes Takeoff (doors)
What is the max number of messages that can be displayed on the EICAS?
The EICAS can hold 15 messages without scrolling
What is the takeoff inhibition logic for the EICAS?
Inhibition begins after the airplane reaches V1 minus 15 knots.
The inhibition is deactivated when
RA is greater than 400 feet
Calibrated airspeed is less than 60 knots (in the event of rejected takeoff)
After 1 minute (in the event of an RA failure).
What is the approach and landing inhibition logic for the EICAS?
Inhibition is deactivated when
The airplane is on the ground more than 3 seconds
After 1 minute (from passing 200 feet RA in the event of a go-around.
How many channels does the Aural Warning Unit (AWU) have? How is it powered?
There are 2 channels for AWU: primary (A) and backup (B). The system is powered two busses, the essential and DC.
What configurations generate a takeoff config warning?
Flaps not in takeoff (9, 18, 22)
Parking brake set
Pitch trim out of the green
Any spoiler panel is deployed
Does not check gust lock or engines running
What does the EGPWS provide?
Provides graphic displays of conflicting terrain.
How are stalls detected?
The Stall Protection System (SPS) is composed of 1 computer box with 2 independent channels, the SPS panel, 2 AOA sensors, 2 stick shaker actuators, and 1 stick pusher actuator.
The PLI populates on the attitude indicator when the margin to stick shaker reaches 10 degrees. On the airspeed tape, stick shaker actuation speed is represented by the amber band; stick pusher occurs in the red band.
Does the stick shaker work if an SPS channel fails? Pusher?
SPS needs only 1 functioning channels to activate the stick shaker but must have 2 for the pusher.
Can the stick pusher be overridden?
Yes, by pressing the red quick disconnect button on either yoke.
