PERFORM DEICE/ANTI-ICE PROCEDURES

Question 1

What is the clean wing concept?

Answer 1

An aircraft must not takeoff with frozen contaminants adhering to the wings, control surfaces, engine inlets, or other critical surfaces.

Question 2

What are the critical surfaces on the CRJ? (Appendix A GDPM Section 3)

Answer 2

Critical surfaces: (WHVE Controls)

● Wing leading edge, Forward and rear upper surfaces (including winglets), and associated flight controls
● Horizontal stabilizer leading edge, forward and rear upper surfaces and associated flight controls
● Vertical stabilizer and associated flight controls
● Engine inlets

Critical areas: (AAA FLAW)
● Air data probes and sensors
● AOA vanes
● Antennas
● Fuel drains and NACA vent scoops
● APU intake and exhaust
● Landing gear
● Flight deck Windshield and windows

Question 3

Under what conditions is a cold weather preflight required?
(OAT FUEL COND NIGHT IN SOAK)

Answer 3

● OAT 5°C or less
● Wing fuel temp 0°C or less
● Atmospheric conditions conductive to ice exist
● Remained overnight and may have been exposed to ice
● Residual ice from inbound flight
● Cold soak ice is suspected in the fuel tank area

Question 4

If the temperature is 5°C or less the preflight inspection must take place no more than how many minutes from pushback?

Answer 4

30 minutes

Question 6

During the cold weather preflight inspection 1/8 inch of ice is observed on the underside of the fuel tank, what is the appropriate action?

Answer 6

Deice, there is an allowance for up to an 1/8 inch of frost under the fuel tanks, but not ice

Question 7

Is it acceptable to depart with frost anywhere on the airplane? If so, where?

Answer 7

• Frost up to a max of 1/8 inch is allowed on the underside of the wing tanks
• Takeoff with frost on the upper surface of the fuselage through which it is possible to determine surface features is permitted. However, any combination greater than a thin layer of hoar frost must be removed

Question 8

Show me the deice checklist for the CRJ 200 engines running.

Answer 8

Company manuals - Weather

Question 9

Is the checklist completed as a challenge/response?

Answer 9

Yes, it is a challenge/response as well as read do.

Question 10

Where is the GDPM located?

Answer 10

Company manuals - Weather

Question 11

How is the cold weather preflight inspection conducted?

Answer 11

• Visually inspect the critical surfaces for frozen contaminants
• Inspect the wing area with a tactile check

Question 12

Is the pilot conducting the cold weather preflight required to physically touch the wing?

Answer 12

Yes

Question 13

How is deicing accomplished?

Answer 13

• A one step process to remove frozen contaminants from the aircraft
• Flight deck crew
  o Position the aircraft to the deice location
  o Configure aircraft in accordance with the flight deck deice/anti-ice checklist
  o Establish communications with the deice personnel

Question 14

How is anti-icing accomplished?

Answer 14

A two-step process used to provide protection against the formation of frozen contaminants after the aircraft has been decided

Question 15

17 - When does the holdover time begin?

Answer 15

Holdover time begins when the final application of the anti-icing fluid is first applied to the aircraft

Question 16

How is the aircraft configured for deicing/anti-icing?

Answer 16

In accordance with deice/anti-ice checklist

Question 17

When is the fuselage required to be deiced?

Answer 17

A thin layer of hoar frost is permitted but only to the extent that airplane markings can still be seen, any contamination greater than a thin layer of hoar frost is not permit

Question 18

What should the flight crew communicate to deice personnel?

Answer 18

a. Tail number
b. Brakes set/configured for deicing
c. Type of fluids required

Question 19

What should the deice crew communicate to the flight crew?

Answer 19

a. Specifies type of fluid
b. Specifies fluid dilution
c. Specify the time of the beginning of the final anti-icing step

Question 20

What is element A,B,C, and E?

Answer 20

a. Specifies type of fluid
b. Specifies fluid dilution
c. Specify the time of the beginning of the final anti-icing step
e. Specification that post deicing or anti-icing check for clean surface is complete

Question 21

Calculate a HOT using the following conditions, can the CRJ 200 operate in these conditions?

Answer 21

010/10 ¼ SM SN OVC002 M01/M01 A29.92 / Clariant Safewing MP4 Launch.
No, the CRJ 200 cannot operate in heavy snow, no holdover time exist

Question 22

Does the above HOT change if FG is reported in addition to SN?

Answer 22

Yes, you must now use manual precipitation intensity

Question 23

25 - Can operations be conducted when light and moderate ice pellets and light ice pellets mixed with other forms of precipitation are occurring?
Operations in ice pellets are approved provided:

Answer 23

• Aircraft is properly decided and anti-iced with undiluted type 3 or 4
• HOTs cannot be used
• Allowance times are found in the allowance time tables in the eHOT app
• Allowance times begin at the start of type 3 or 4 anti-icing fluid application
• Allowance time cannot be extended by a pretakeoff check or a pretakeoff contamination check
  The allowance time becomes invalid when:
• Ice pellet precipitation becomes heavier than moderate
• Light ice pellets mixed with another form of precipitation exceeds listed intensities
  c. Any precipitation condition exceeds the listed temperature ranges

Question 24

26 - How does a pilot determine if fluid has failed?

Answer 24

A fluid is considered failed when it no longer absorbs precipitation, failed fluid loses all glossiness and has a dulled crystalline appearance

Question 25

When is the pretakeoff check required? How and from where is it accomplished?

Answer 25

• A pretakeoff check is required anytime an aircraft has been deiced/anti-iced and a HOT has been established.
• Performed by the flight deck crew within the HOT and as close as practical to takeoff. The flightdeck crew performs the check from any vantage point in the aircraft the PIC determines

Question 26

What is the procedure if the pilot cannot determine if the aircraft is clear of frozen contaminants after deicing/anti-icing?

Answer 26

If it cannot be determined that representative surfaces are free of frozen contaminants, the deicing procedure must be repeated

Question 27

When is a pre takeoff contamination check required?

Answer 27

● When freezing or frozen precipitation has been present since the completion of the post deicing/anti-icing check and:
○ HOT has been exceeded or
○ The HOT is no longer valid due to changing weather conditions; or
○ Operations in heavy snow are being conducted
● Not authorized in CRJ200

Question 28

How is it accomplished?

Answer 28

From inside the cabin

Question 29

What aircraft does the pre takeoff contamination check apply to?

Answer 29

CRJ 700 and CRJ 900

Question 30

Can a pre takeoff contamination check be accomplished from the flight deck?

Answer 30

No

Question 31

What is the valid time period for a pre takeoff contamination check?

Answer 31

Within 5 minutes of takeoff