11.12 Ice and Rain Flashcards
How is ice detected by the electronic ice detectors
Ice decreases the frequency of the vibrating probe tip and the frequency change is detected
What method is used to remove snow and ice?
De ice the aircraft by following company procedures
Where is the heat for wing and engine anti ice system supplied from?
From hot air off the engine bleed air system for engine
And pneumatic system for wing
How are the engine and the wing thermal anti-ice systems operated?
- Each engine anti- ice has its own control switch
- the left and right wings are controlled by same switch
What are the restrictions for windscreen wipers?
- Switched on only when aircraft is wet
- aircraft speed has to be less than 250Kts
What is a rotary type ice detector driven by?
A single phase AC motor
How are the probe heating systems switched on?
Automatically when the engine is started
How many holes per inch are laser drill into TKS weeping wing chemical anti ice panels?
800
How long will chemical wing anti- ice system reservoir enable the system to operate for?
1-2 hours
How long are pneumatic de- ice boots inflated for?
6-8 seconds
The air source for de ice boots in turbine aircraft is supplied by what component?
The engine compressor
When should pneumatic de- ice boots be cleaned?
During the aircraft scheduled wash
How is electrical power supplied to the propeller de ice boots?
Slip rings
To prevent thermal shock on electrically heated windscreen, power is ramped slowly for how long?
4 minutes
Which type of temperature coefficient do window heating system temp sensors posses?
A positive temperature coefficient
