Moisture can be put into effect by placing the aircraft in clouds or selecting rain, patchy fog, or fog. Ice
accumulations are displayed as a percentage of the maximum icing effect that is simulated. All probe
surfaces will accumulate ice at twice the selected rate (if unheated), and will ice to 100% at this rate as
long as an Ice Quantity above zero is selected. A probe will cease to function when it reaches 100%.
Body Ice represents the amount of ice accumulating on any surface that has no Anti-Ice capability.
Being outside the icing envelope would occur when there is no moisture in the air, or when the air
temperature is too warm. If the aircraft is outside the icing envelope, the wing and fuselage accumulated
amounts will be reduced to reflect melting or evaporation automatically. Other areas with accumulated
ice will be reset to zero ice.
3.30.2.1.
Using The Icing Function
1) Access the Icing page.
2) Set the quantity and rate of ice accumulation by using one of the three preset selections
direct entry buttons; LIGHT (50%, 5 min), MEDIUM (75%, 5 min), or SEVERE (100%, 5
min). The selected button remains illuminated blue to indicate which rate is in effect.
or,
If none of those are suitable, the instructor can select any ICE QUANTITY desired from 0%
to 100%, and any rate for the ice to accumulate in minutes. The selected time in minutes
reflects how much time it will take to accumulate the quantity of ice that has been selected. If
the selected time is changed while ice is already accumulating, a new rate of accumulation
will be calculated as if the ice accumulation were starting from zero.
3) To remove icing from the lesson, select the REMOVE ALL ICE button or set the ICE
QTY to zero.
4) To exit the Icing Parameters overlay, select the CANCEL button.
5) The OK direct entry button closes the overlay and implements the changes.
TM-3-B 737-IOS1-007
ENVIRONMENT/VISUAL
FSI-SSD
3-51
TOUCH SCREEN (NT IOS)
B 737
JAN 2001