Deice / Anti-Ice Flashcards
What checklist must be complete prior to starting the
deice/anti-ice process?
The Before Start Checklist.
ERJ FLIGHT DECK DEICE/ANTI-ICE CHECKLIST
What is used in lieu of normal procedures Checklist from the start of the deice/anti-ice process through the Before Takeoff Checklist?
ERJ FLIGHT DECK DEICE/ANTI-ICE CHECKLIST.
What is the guidance the checklist provides regarding
running the APU during deicing procedures?
Should remain off. (ERJ FLIGHT DECK DEICE/ANTI-ICE CHECKLIST)
Are there different deice procedures for Engines off vs
Engines Running?
Yes. (ERJ FLIGHT DECK DEICE/ANTI-ICE CHECKLIST)
Are the Deice/Anti-ice Communication Elements required? Where are they found?
Yes. COMMUNICATION ELEMENTS TABLE
List two required communications elements from the
COMMUNICATION ELEMENTS TABLE.
o Type of fluid to be used
o Percentage of fluid
o Time of beginning of final deice step
o Deicing complete
When does the Holdover Time (HOT) begin?
Final application of fluid commences.
GDPM DEFINITIONS
What does the HOT represent?
A range of time in which the fluid provides acceptable protection for the varying precipitation intensities. (GDPM HOT guidelines)
In a HOT table what do the longer and shorter times
represent?
Heavier vs Lighter precipitation.
GDPM HOT guidelines
What should a crew use to determine precipitation
intensities in order to accurately establish a HOT?
Official weather observations, tables from the GDPM should only be used in the absence of intensities listed in the official observations.
(GDPM Precipitation intensities and types.)
Can the HOT be used as the sole determinant that aircraft critical surfaces are free of frozen contaminants.
No, several pre-takeoff checks may be required to determine the condition of the aircraft prior to takeoff. (GDPM HOT Guidelines)
What are two factors that influence the effectiveness of deicing/anti-icing fluid?
o Change in precipitation type, intensity, and moisture
content.
o Change in ambient and aircraft skin temperature.
o Position of aircraft relative to the exhaust or prop
wash of other aircraft.
o Change in wind direction or velocity.
Can parking in the proximity of another aircraft’s jet wash blow the deice/anti-ice fluid off the wings rendering the HOT invalid or the fluid ineffective?
Yes.
GDPM HOT Guidelines
List two precipitation types that HOTs do not exist for;
o Heavy snow
o Ice pellets
o Moderate and heavy freezing rain
o Hail
When is a Pre-takeoff check conducted?
Within the holdover time and just prior to takeoff.
GDPM DEFINITIONS
What is checked as part of the pre-takeoff check?
The representative surface from a vantage point in the aircraft that the PIC determines will give an accurate indication of the condition of the aircraft.
(GDPM DEFINITIONS)
What should the crew do if they are unable to
determine that the representative surface is free from
frozen contaminants?
The aircraft must be deiced again.
GDPM Pre-takeoff Procedure
When is a pre-takeoff contamination check conducted?
After the HOT has been exceeded or the HOT is no longer valid due to changing weather conditions, or in heavy snow - to ensure the wings, control surface and other critical surfaces are free of all frozen contaminants.
(GDPM DEFINITIONS and HOT Exceeded.)
Is there ever a case where the aircraft can depart with
frozen contaminants on any of the critical surfaces?
No.
GDPM
