GDP

Question 1

What is the purpose of SkyWest GDP

Answer 1

To establish procedures for employees to assure no aircraft takes off with any frozen contaminate on wings, control surfaces, engine inlets, and other critical surfaces

Question 2

Explain Type IV de icing fluid

Answer 2

Ethylene Glycol or Propylene Glycol

Question 3

Clean aircraft concept

Answer 3

The aircraft must not take off with any frozen contaminates to wings, control surfaces, engine inlets or other critical surfaces

Question 4

What is cold Soaked?

Answer 4

The wings of an aircraft become cold soaked when very cold fuel from flying in low temperatures or cold fuel from the fuel truck. This can result in clear ice forming on the wings even though the outside temp is above freezing when precipitation is occurring.

Question 5

Cold weather inspection required

Answer 5

1. Visual and tactile inspection when the outside air temp is below 5 degrees
2. Inbound flight where ice has accumulated
3. Cold soaked fuel tank
4. Conditions conducive to icing

Question 6

Condition conducive to icing

Answer 6

Icing may occur when the OAT is at or below 10 degrees and

1. Visible moisture is present
2. Moisture on the wing.
3. Frost formation
4. Standing water or ice on ramps, taxi ways or runway

Question 7

Deicing methods

Answer 7

1. Manual Removal with padded brooms to remove large chunks of snow
2. One step.
3. Two step process
4. Mechanical like air blower

Question 8

De icing fluid failure

Answer 8

Occurs when frozen contamination accumulates on top of the de ice fluid. Fluid becomes opaque loss of shine to the fluid

Question 9

What is HOT

Answer 9

A range time in which deice or anti ice fluid is good to prevent frozen contaminates from sticking to the airplane

Question 10

Pretakeoff check

Answer 10

A check of the aircraft surface for frozen contaminates with in the HOT just prior to takeoff

Question 11

Pretakeoff contamination check

Answer 11

Check conducted after the HOT has expired to insure control surfaces, both wings, are free of frozen contaminates

Operations in heavy snow

Weather conditions have changed from the original HOT

Takeoff must occur within 5 minutes of the inspection

To be able to use a pre takeoff contamination check the anti icing must of been initiated at the wings

Question 12

Representative surface

Answer 12

1. Usually the top of left wing
2. First to be deice
3. Must be clearly seen to determine no frozen contaminates are on it.

Question 13

Definition of Wet Runway

Answer 13

More than 25% or the runway is covered by water that’s 1/8 inch or less

Question 14

Definition of contaminated runway

Answer 14

When more than 25% of the runway surface and more than 1/8 inch is covered with snow. Slush. Ice or water

Question 15

What are affects of frozen contaminates on aircraft for takeoff

Answer 15

1. Sever Loss of lift
2. Increases drag by 40%
3. Change in stall speed

Question 16

Can we fly into sever ice? What is severe ice conditions.

Answer 16

No. Aircraft is not certified to fly into sever icing.

The deicing/anti icing equipment can not handle sever icing conditions.

Question 17

What resources can you use to prevent flying into severe wx conditions?

Answer 17

Dispatch.

Wx reports

ATC

Pireps

Question 18

What is the Freezing Precipitation Table?

Answer 18

Found in manual SP2800 and flip cards

Use to determine if flight operations can be conducted in freezing precipitation

Question 19

Takeoff is permitted with how much frost and where

Answer 19

No more than 1/8 inch underneath the wing.

Question 20

Do HOT exist for heavy snow operations?

Answer 20

No. However data indicates that operations can continue with two steps deicing and anti ice fluids and a pre takeoff contamination check

Question 21

Can HOT be adjusted?

Answer 21

Yes if the conditions change.

Question 22

Deicing Communication steps

Answer 22

A. Type of fluid
B. Percentage of the fluid type I is mixed with water. Type IV is always 100%
C. Time
D. Date
E. The post deice or anti ice check has been completed by the ground crew. This means the aircraft is free of frozen contaminates.

Question 23

Which type of precipitation’s do not have hold over times

Answer 23

1. Heavy snow
2. Ice Pellets
3. Modérate to heavy freezing rain
4. Heavy freezing drizzle
5. Hail

• you get allowance times from the table
• the time begin at the start of type IV application
• allowance times can not be extended via a pre takeoff contamination check.

Question 24

Can we depart to an airport that is reporting or forcast Freezing Rain or Freezing Drizzle?

Answer 24

Yes with an alternate

Question 25

Under what conditions can we operate under freezing drizzle or freezing rain.

Answer 25

1. We can operate in Light to Moderate Freezing Drizzle

2. We can operate in Light Freezing Rain.