Perform Deice/Anti-Ice Procedures

Question 1

CA - When is a cold weather pre-flight inspection required?

Answer 1

OAT ≤5°C or icing conditions, overnight possible contamination, through flight w/ice, wing fuel temp ≤0°C

Question 2

FO – How is a cold weather pre-flight inspection conducted?

Answer 2

Consists of a visual check of the aircraft’s critical surfaces (vertical stabilizer, flight controls, horizontal stabilizer and wing
leading edges, upper surfaces, engine inlets, air data probes and sensors, AOA vanes, antennas, fuel drains and NACA vents,
APU intake and exhaust, landing gear, flight deck windshield and windows) and a tactile check of the leading edge and upper
surface of the wing

Question 3

CA – What is the clean aircraft concept?

Answer 3

The Ground Deicing Program (GDP) uses the clean aircraft concept, which means an aircraft must not takeoff when frost, ice,
or snow is adhering to the wings, control surfaces, engine inlets, and other critical surfaces of the aircraft.

Question 4

4. FO – Is it ever permissible to takeoff with contaminants on the under surface of the wing and if so what type of contaminant
   and maximum thickness?

Answer 4

Frost ≤1/8” on the bottom surface of the wing tank area does not need to be removed.

Question 5

CA – What is a Hold Over Time?

Answer 5

Range of times in which fluid provides acceptable protection from varying precipitation intensities

Question 6

FO - What is the Hold Over Time for the following conditions: Clarient Safe Wing MP IV Launch, OAT -10C, FZDZ?

Answer 6

Use EFB
0h 27min – 1h 16min
(EFB HOT App/Appendix A:FAA Adjusted Holdover Time Guidelines)

Question 7

CA – If the snowfall intensity is absent in an official weather observation, how is snowfall
intensity determined when calculating a Hold Over Time?

Answer 7

Visibility table

Question 8

FO – Is it advisable to use Snowfall Intensities as a Function of Prevailing Visibility chart when visibility is reduced by
snowfall along with other forms of obscuration (FG, HZ, FU)?

Answer 8

no

Question 9

CA – During the Pre Deice/Anti-Ice check, what information is communicated from the flight crew to deice personnel?

Answer 9

Tail number, parking brake set, configured for deice, type of De/Anti-icing fluid required, and surfaces to be deiced.

Question 10

FO – What Elements are required to be communicated from deice personnel to the flight crew?

Answer 10

Start time of final application, type and dilution, A/C post insp complete, free and clear

Question 11

CA – Is the Flight deck deice / Anti-ice Checklist completed as challenge and response?

Answer 11

Yes

Question 12

FO – What is a pretakeoff check and when is it required to be conducted?

Answer 12

Check of A/C representative surface, w/in HOT, just prior to takeoff

Question 13

CA – What is normally the representative surface on SkyWest aircraft?

Answer 13

Left wing.

Question 14

FO - What action must be taken if the crewmember conducting the pretakeoff check is unable to determine if the representative surface is free of frozen contaminants?

Answer 14

Opaque, lumpy, not glossy, rough, dull, snow on top

Question 15

How do you determine if de-ice and/or anti-ice fluid has failed?

Answer 15

A fluid is considered failed when it is no longer able to absorb frozen precipitation. Under
these circumstances, the assumption must be the contamination is adhering to the critical surfaces. Fluid loses its glossy appearance, frozen contaminants resting on the fluid.
before a subsequent takeoff.

Question 16

FO - When is a pretakeoff contamination check required?

Answer 16

Heavy snow or HOT exceeded, w/in 5 min of takeoff, CRJ 700/900 or ERJ only

Question 17

CA – How is a pretakeoff contamination check conducted?

Answer 17

The PIC sets parking brake and the aircraft must remain static, an announcement is made to notify passengers, out of flight
deck protocol is used while either the PIC or FO conducts the Pretakeoff Contamination Check from inside the cabin within 5 min from takeoff, the upper surface of both wings must be inspected.