General OPS: Ground De-Icing Program

Question 1

When is a Cold Weather Preflight inspection required?

Answer 1

-OAT <5 C
or
-Atmo conditions conducive to icing exist
or
-The aircraft remained overnight and may have been subject to contamination
or
-A through flight and residual ice from the inbound leg may have accumulated
or
-Wing Fuel temp is <0 C

Question 2

How is a Cold Weather Preflight inspection conducted?

Answer 2

During External Inspection, to determine critical surfaces are free from frozen contaminates

Question 3

When there is ice or frost in the wing tank area due to a cold soaked aircraft, does the upper surface need to have it removed? Does the lower surface contamination need to be removed?

Answer 3

• Upper Removed

- Lower doesn’t need removal

Question 4

What are the critical surfaces that must be clear of frozen contaminates?

Answer 4

• Wing + Controls
• Horizontal Stab + Controls
• Vertical Stab + Controls
• Engine inlets

Question 5

What critical areas must be clear of frozen contaminates?

Answer 5

• Air Data Probes + Sensors
• AOA Vanes
• Anntennas
• Fuel Drains
• NACA Vent scoops
• APU Intake/Exhaust
• Landing Gear
• Windshields/Windows (Flight deck)

Question 6

Which fluid types are used for deicing?

Answer 6

• Type 1
• Type 2 (Not SW Approved deice)
• Type 3

Question 7

Which fluid types are used for anti-icing?

Answer 7

• Type 2
• Type 3 (Must be undiluted)
• Type 4

Question 8

What elements must be communicated during deice/anti-ice procedures?

Answer 8

a) Tail Number

b) Type of Fluid/Surfaces to be treated

Question 9

When is the Pretakeoff Check required?

Answer 9

Anytime the Aircraft has been De/Anti-iced, and HOT established

Question 10

When is the Pretakeoff check accomplished?

Answer 10

Prior to taking the active runway for departure, within HOT

Question 11

Prior to Takeoff, if the HOT is exceeded or deice/anti-ice fluid fails, can you still takeoff? What procedures must be followed?

Answer 11

No. Aircraft must be deiced again