Test 2 Flashcards
What is the Primary source for Hydraulic System 1?
Engine driven pump 1A
What is the Backup source for System 1?
Power transfer unit
(PTU)
What is the Primary source for System 2?
Engine driven pump 2A
What is the Backup source for System 2?
AC motor pump 2B
What is the Primary source for Hydraulic System 3?
AC motor pump 3A
What is the Backup source for System 3?
AC motor pump 3B
Where are the 3 hydraulic system components generally located?
1 left wtb fairing
2 right wtb fairing
3 aft equip bay
What is the sequence to turn on all 3 hydraulic systems?
2B on
PTU on
3A on
Where can we see the hydraulic systems indications?
Hydraulic Synoptic Page
How can the Firewall Shutoff Valves (FWSOV) get closed?
- HYD SOV РВА
- Fire PBA
- Ні Temp.
Switch on Rsvr.
When does the EDP Depressurization Valve energize?
Aircraft in the air
Engine N2 < 25%
(automatically controlled by
EEC.)
Which system uses 2 large nitrogen filled accumulators?
3 System
The accumulators provide hydraulic pressure to the primary hydraulic systems during dual engine failure and the time interval before RAT operation.
What information must be known before servicing hydraulics?
Hydraulic fluid temperature
Where can we see hydraulic fluid quantity?
Visual QTY Indicator
Fluid QTY Transducer
HYD Synoptic page
How does the A220 maintain Head Pressure on the Reservoir?
The Bootstrap
Reservoir uses system pressure for head pressure.
A Check Valve and
Accumulator hold head pressure with system pressure off.
How do we dump Head Pressure on the Reservoir?
Rotate the Manual
Depressurization
Valve on the reservoir.
(Gold Knob)
What other valve do we use when servicing the reservoir?
Push the Low-Pressure
Bleed / Relief Valve to bleed off air.
Which flight controls are part of the Electronic Flight Control (EFCS) System?
• Ailerons
• Elevators
• Rudder
• Spoilers
• Horizontal Stab.
Which flight controls are NOT part of the Electronic Flight Control (EFCS) System?
Slats
Flaps. (High lift)
What are the flight control input devices in the flight deck called?
Inceptors.
Side Stick Controllers
Rudder Pedals
Spoiler Lever
Trim Switches
What components do the Inceptors use to interface with the rest of the EFCS?
Inceptors Interface
Module (IIM) (3ea.)
What components do the lIMs send the Raw Command to?
Primary Flight Control
Computers (PFCC) (3ea.)
What are the main functions of the Primary Flight Control Computers?
• Convert Raw Command inputs to Computed Commands
• Control Laws
• Autopilot
• Autoland
What components do the IlMs send the Computed Commands to?
Remote Electronics
Units (REU) (10ea.)
What components do the REUs send the Computed Commands to?
• Power Control Units
• Ground Spoiler Control Unit
• Motor Control Electronics
What components provides “clean” power to the EFCS?
Fly By Wire Power Converters
FBWPC
What are the 4 Modes of the EFCS?
Normal mode
PFCC
DIirect Mode
REU
Direct Mode
AFCU
Direct Mode
How do you take Side Stick Priority?
Latched Priority PBA
Momentary Priority red button on stick
How do you perform a Stick Shaker Test?
Avionics synoptic page
What is one quick way to Reset a Primary Flight Control Computer?
Cycle the 3 PFCC
PRIMARY FLIGHT
CONTROLS PANEL
PBAS (3 finger salute)
The Motor Control Electronics is used for which flight control?
Horizontal stabilizer
What are the controlling units called for Slats and Flaps?
Slat / Flap Electronic Control Unit
What position do the Slats and Flaps go to in ALTN FLAP?
3
What is the controlling LU for gear retraction ?
LGSCUs
How do we bypass wheel steering?
Nose wheel PBA
