Cold Weather Ops

Question 1

How often do you need to Ice Shed on the ground?

Answer 1

• Every 30 minutes.
• Set 35% N1 initially, then 70% N1 for 30 seconds

Question 2

How often do you need to Ice Shed on the Inflight?

Answer 2

• Every 10 minutes, if any icing condition while less than 70% N1
• Pull towards IDLE (5% N1 change) for 5 sec, then 80% N1(minimum) for 20 sec

Question 3

What kind of T/O if it is greater than LIGHT ICING?

Answer 3

Perform a STATIC T/O

Question 4

Does the APU enclosure need to be heated?

Answer 4

APU enclosure should be heated to 0 F or above

Question 5

How much snow/ice accumulations are allowed to remain on the control surfaces?

Answer 5

ALL accumulations WILL be removed from control surfaces to meet balance requirements

Question 6

Can maintenance skip the balance bay inspections after de-icing?

Answer 6

Balance bays SHALL be inspected

Question 7

Which parts of the aircraft need to be completely free of snow and ice?

Answer 7

Control Surfaces, Tabs, and Balance Cavity MUST be completely free of snow and ice

Question 8

Can the windshield be sprayed with de-ice fluid?

Answer 8

No de-ice/anti-ice allowed on Plexiglass

Question 9

What are you looking for on shock struts, actuating cylinder pistons, and limit switches?

Answer 9

These must be free of dirt and ice

Question 10

How can you tell if the liquid anti-ice is no longer effective?

Answer 10

Once the fluid changes from glossy/smooth/gel-like to slushy/milky/gummy. Or is there is any snow/ice/slush accumulations on the surface

Question 11

If using anti-ice, what is the Pre-Takeoff Check?

Answer 11

• Completed from INSIDE the jet
• Check the Wings, Nacelles, Wipers
• If any contamination, then complete a PRE-TAKEOFF CONTAMINATION CHECK

Question 12

What is a PRE-TAKEOFF CONTAMINATION CHECK?

Answer 12

• Complete if holdover time has expired
• Complete if freezing precipitation has landed on a non-anti-iced jet
• Completed from OUTSIDE the jet, within 5 minutes from T/O
• Open the left over-wing hatch
• If any contamination, then return to the ramp

Question 13

Do you do anything different with the brakes before setting them?

Answer 13

Operate the brakes several times before setting the parking brakes

Question 14

When does engine anti-ice need to be turned on before engine start?

Answer 14

If below freezing temps, turn engine anti-ice on before engine start to warm engines.

Question 15

Oil Pressure:
What to look out for during engine start?

Answer 15

• Blk 45: Increasing
• Blk 40: Positive
• Oil Pressure Light may flicker on/off several times
• Due to cold viscous oil OR clogged oil filter

Question 16

When moving the flaps, what are you looking for?

Answer 16

Watch flap movement for stuck/frozen flaps