Systems Questions Flashcards
What controls are not Fly-By-Wire
Ailerons
All FBW controls employ what?
ACE - Actuator Control Electronics
What does the electrical PBIT do?
It is automatically performed during power up and provides detection of out-of-tolerance conditions and failures in the FCM’s, P-ACE and SF-ACEs
What is required for the Electrical PBIT
Automatic after aircraft is powered by any AC source
How long does the Electrical PBIT take?
Approximately 3 minutes
If the FLT CTRL BIT EXPIRED msg is displayed… ??
The Hydraulic PBIT must be performed
What 3 conditions interrupt the electrical PBIT
Any Hydraulic pump is running
The Flight Control Mode Panel switches are cycled
The AC power supply is interrupted
What does the Hydraulic PBIT do?
Provides functional test of the flight actuators
The Hydraulic PBIT is performed… when???
Automatically when all 3 hydraulic systems are engergized
The Hydraulic PBIT can be initiated manually how?
Manually by turning on all 3 hydraulic pumps.
How long does the Hydraulic PBIT take?
Approximately one minute
The Hydraulic PBIT will not begin if hydraulic reservoir temperature is… ?
Below 10 deg C
On the ground, Hydraulic Pump System 1 and 2 ACMPs come on in the Auto Position when… ?
Flaps greater than zero,
- Thrust set for Takeoff
or
- Ground speed greater than 50 Kts
On the ground hydraulic ACMP 2 will automatically be activated when… ?
Engine #1 is running AND parking brake released
When does hydraulic ACMP 2 turn off on the ground?
Automatically after 6 minutes have elapsed from parking brake application
What is the PTU
Power Transfer Unit
When is the PTU activated?
During Takeoff and Landing if the engine 2 or EDP 2 fails
The PTU will automatically be activated when ALL of the following conditions are met:
Flaps greater than Zero
EDP 1 not failed
Hydraulic reservoir 2 quantity above 12%
Hydraulic System 3 is comprised of … ?
One Reservoir
Two Hydraulic ACMPs
One Accumulator
The Hydraulic System 3 supplies what systems?
Elevator ( right hand outboard )
Rudder ( lower actuator )
Ailerons ( left and right outboard actuators )
When is the Hydraulic 3B actuated?
In flight if hydraulic electric pump 3A fails
Meaning of HYD 1 HIGH TEMP Caution Msg
Hydraulic reservoir temperature has reached 100 deg C
Meaning of HYD 1 OVERHEAT Warning Msg
Hydraulic Pressure has reached 145 deg C
When Hydraulic fluid temp increases to 100 deg C
HYD 1 HIGH TEMP Caution EICAS Message
When Hydraulic fluid temp reaches 125 deg C
Hydraulic SOV closes
When Hydraulic fluid temp reaches 145 deg C
HYD 1 OVERHEAT Warning EICAS Message
The electrical PBIT takes how long?
3 minutes after AC power is established
The electrical PBIT will be interrupted if… ?
Any hydraulic pump is running
The Flight Control Mode Panel switches are cycled
The AC power supply is interrupted
Hydraulic PBIT takes how long?
One minute after all three hydraulic systems are pressurized
The hydraulic PBIT will be interrupted if… ?
Any flight control surface is moved while test is running
