Ice Protection Flashcards
What is the purpose of the optional TKS ice protection system?
Permits flight into known icing conditions, except for specific conditions.
List the conditions under which the TKS ice protection system should not be used.
- Forecast icing conditions greater than MODERATE
- Freezing rain
- Freezing drizzle
- Ambient temperatures below -30˚C
What does the TKS ice protection system distribute on the aircraft’s surfaces?
A film of fluid on the wings, horizontal and vertical stabilizer, propellers, and canopy.
When should the TKS ice protection system be activated for best results?
Prior to icing encounters.
How many airframe pumps and filters are included in the TKS ice protection system?
2 airframe pumps and filters.
Where are the windshield de-icing pumps located?
In the nose compartment.
What do the proportioning units in the TKS system do?
Regulate fluid flow.
What is the capacity of the fluid reservoir in the TKS ice protection system?
7.9 gallons.
What is the weight of the fluid reservoir in the TKS ice protection system?
72.7 pounds.
How many LED ice detection lights are included in the TKS ice protection system?
2 LED ice detection lights.
What material are the leading edge panels of the TKS system made from?
Porous, stainless steel.
What components are included in the TKS ice protection system?
- Airframe pumps and filters
- Windshield de-icing pumps
- Proportioning units
- Fluid reservoir
- LED ice detection lights
- Leading edge panels
- Propeller nozzles and slinger rings
- Windshield spray bar
True or False: The TKS ice protection system allows flight into severe icing conditions.
False.
Fill in the blank: The TKS ice protection system is designed to activate before _______ encounters.
[icing]
What are the positions of the 3 position switch?
OFF, NORM, HIGH
What is the function of the momentary switch?
MAX mode (used with HIGH mode ON)
What color is the NORM indicator light?
White
What color is the HIGH indicator light?
Amber
What color is the MAX indicator light?
Amber
What does the pump selector switch control?
Pump 1 / Pump 2
What is the purpose of the Ice Light / DEIC PRES LO annunciator test switch?
What does the alternate power switch do?
What is the function of the windshield deice?
How are the airframe and windshield fluid distribution systems designed?
Separate, redundant fluid pumps
What happens when the DEIC PRES LO is displayed?
Pump selector switch changes active pump for both airframe and windshield systems
What occurs when HIGH mode is selected and the MAX button is depressed?
Standby airframe pump runs concurrently with the active pump for maximum fluid flow for two minutes
What happens after the two minutes of MAX mode?
The system will return to HIGH mode
What does the NORM selection indicate on the ice protection system?
The lower, white indicator light will illuminate
Indicates normal operation mode.
What happens when HIGH is selected and the MAX button is pressed?
The middle and upper amber lights will illuminate for two minutes
This indicates a temporary boost in ice protection.
What message may be displayed when activating HIGH mode at temperatures below 10˚C?
DEICE PRES LO
Indicates low deice pressure.
How long does the WINDSHIELD push button provide fluid flow?
5 seconds
Activates the windshield spray bar.
What happens if the Electric master switch is ON and the canopy is open when pressing the WINDSHIELD button?
De-icing fluid will spray into the cockpit
This occurs even if the airframe ice protection switch is OFF.
What is the normal power source for the airframe ice protection system?
LH main bus
The system can switch to RH main bus if LH fails.
What is the endurance of the airframe ice protection system when the ALTERNATE switch is ON?
1 hour
Assumes a full reservoir.
What is the capacity of the fluid reservoir?
7.9 gallons
Located in the right nose baggage compartment.
What message is displayed when fluid level is below 2.6 gallons?
DEICE LVL LO
Indicates low fluid level.
What is the density of approved de-icing fluid AL-5?
9.2 pounds per gallon
Affects total weight calculations.
What is the minimum fluid requirement for dispatch into known icing conditions?
5.8 gallons
Provides 90 minutes of protection.
What is the minimum operating temperature for the aircraft?
-30˚C
Below this, operations may be unsafe.
What should be done if ice accumulates aft of protected surfaces?
Disengage autopilot
Also do this if trim warnings occur.
What is the minimum climb speed for the DA42NG?
118 KIAS
Ensures safe ascent performance.
What is the minimum approach speed with Flaps APP?
90 KIAS
Critical for landing safety.
List the ice protection CAS messages.
- DEICE LVL LO
- DEICE PRES HI
- DEIC PRES LO
Indicate various system statuses.
