Transcript Aircraft Systems (Landing Gear)

C-12T2/U Landing Gear
Landing
Gear
System
Terminal Learning Objective
Action: Identify the subsystems of the C-12T2/U
landing gear system and explain the basic operating
principles.
Condition: Using student handout and classroom
notes.
Standard:
IAW the IGRV SEP
SAFETY REQUIREMENTS:
NONE
RISK ASSESSMENT LEVEL:
IV, D, LOW
ENVIRONMENTAL CONSIDERATIONS:
NO IMPACT
C-12T2/U Landing Gear System
Description
Electrically Activated
Switches, relays, electrically powered
valves are actuated when the landing gear
switch is moved in the cockpit
Hydraulically Operated
Pressurized fluid is moved to the
landing gear hydraulic actuators to raise and
lower the landing gear.
C-12 Landing Gear System
Cockpit Switches
C-12 Landing Gear System Fill
Reservoir
C-12 Landing Gear System Fill
Reservoir
C-12 Landing Gear System Fluid
Level Dipstick
C-12 Landing Gear System Main
Reservoir
C-12 Landing Gear System
Reservoir / Power Pack
C-12 Landing Gear System
Accumulator
C-12 Landing Gear System
Description
3 lines from the pump to each gear actuator
Retraction (becomes return line during
extension)
Extension (becomes return line during
retraction)
Emergency
Gear are held up with hydraulic pressure
2474 psi to 2775 psi
Gear are held down with over-center locks
C-12 Landing Gear System
Retraction Operations
C-12 Landing Gear System
Extension Operations
C-12 Landing Gear System
Emergency Extension Operations
C-12 Landing Gear System
Check Valves
C-12 Landing Gear System Nose
Gear Landing/Taxi Lights
C-12 Landing Gear System
Turning Limits
C-12 Landing Gear System
Crush Block
C-12 Landing Gear System Nose
Gear Torque Knee
C-12 Landing Gear System
Shimmy Dampner
C-12 Landing Gear System Main
Gear Drag Brace
C-12 Landing Gear System Main
Gear Down Lock
C-12 Landing Gear System Main
Gear Door
C-12 Landing Gear System Main
Gear Door
C-12 Landing Gear System Main
Gear Torque Knee
C-12 Landing Gear System
Safety Switch
C-12 Landing Gear System
Brake Fluid Reservoir
C-12 Landing Gear System Main
Brakes
C-12 Landing Gear System Pilot
Brakes
C-12 Landing Gear System CoPilot Brakes
C-12 Landing Gear System
Parking Brake Set
C-12 Landing Gear System
Landing Gear Warning Horn
C-12 Landing Gear System
Landing Gear Warning Horn
C-12 Landing Gear System
Landing Gear Warning Horn
C-12 Landing Gear System
Landing Gear Warning Horn
C-12 Landing Gear System
Landing Gear Warning Horn
C-12 Landing Gear System
Landing Gear Warning Horn
C-12 Landing Gear System
Questions??????????
C-12 Landing Gear System
C-12 Landing Gear System
Review Questions
The landing gear are help in the position with
____________ and are held down with
____________.
C-12 Landing Gear System
Review Questions
The landing gear are help in the position with
hydraulic pressure and are held down with overcenter locks.
C-12 Landing Gear System
Review Questions
The brakes use the same type of hydraulic fluid used
by the landing gear system.
TRUE or FALSE
The brakes use hydraulic fluid from the same reservoir
as the landing gear system.
TRUE or FALSE
C-12 Landing Gear System
Review Questions
The brakes use the same type of hydraulic fluid used
by the landing gear system.
TRUE
The brakes use hydraulic fluid from the same reservoir
as the landing gear system.
FALSE
C-12 Landing Gear System
Review Questions
The timer logic relay in the landing gear system will
activate after the gear motor has been operating for
________.
C-12 Landing Gear System
Review Questions
The timer logic relay in the landing gear system will
activate after the gear motor has been operating for 14
seconds.
C-12 Landing Gear System
Review Questions
The timer logic relay activates for gear retraction
operations only.
TRUE or FALSE
C-12 Landing Gear System
Review Questions
The timer logic relay activates for gear retraction
operations only.
FALSE
C-12 Landing Gear System
Review Questions
If the pilot raises the landing gear control switch, and
the landing gear selector valve fails to operate:
The gear will retract normally.
The gear will not retract.
The timer logic relay will activate after 14 seconds.
The landing gear warning horn will activate.
The gear handle light will illuminate.
The three green down lights for the gear will
extinguish.
C-12 Landing Gear System
Review Questions
If the pilot raises the landing gear control switch, and
the landing gear selector valve fails to operate:
The gear will retract normally.
The gear will not retract.
The timer logic relay will activate after 14 seconds.
The landing gear warning horn will activate.
The gear handle light will illuminate.
The three green down lights for the gear will
extinguish.
C-12 Landing Gear System
Review Questions
The pilot places the gear control switch in the up
position. Once the landing gear is fully retracted, the
uplock pressure switch fails to operate:
The gear will retract normally.
The landing gear pump motor will shut down when the
gear is fully retracted.
The landing gear pump motor will be shut down by the
timer logic relay.
The landing gear down indicator lights (green) will
remain illuminated.
The gear relay circuit breaker will open.
C-12 Landing Gear System
Review Questions
The pilot places the gear control switch in the up
position. Once the landing gear is fully retracted, the
uplock pressure switch fails to operate:
The gear will retract normally.
The landing gear pump motor will shut down when the
gear is fully retracted.
The landing gear pump motor will be shut down by the
timer logic relay.
The landing gear down indicator lights (green) will
remain illuminated.
The gear relay circuit breaker will open.
C-12 Landing Gear System
Review Questions
The parking brake can be set from ____________.
The left seat
The right seat
Either seat
The toilet
C-12 Landing Gear System
Review Questions
The parking brake can be set from ____________.
The left seat
The right seat
Either seat
The toilet
C-12 Landing Gear System
What is an unsafe gear indication?
What would you do if one main gear or the nose gear
green light failed to illuminate?
What are you going to do if one gear fails to extend?
Main Gear
Nose Gear
What are you going to do if one gear fails to extend after
manual extension?
Nose Gear
Main Gear
C-12 Landing Gear System
Summary
System description
Normal system operations
Emergency system operations
Brake system
Landing gear warning system
Abnormal operations