NK - Winter Operations

Question 1

When can “Icing Conditions” be expected?

Answer 1

TAT is 10°C or below and visible moisture is present.

Question 2

What is considered “Visible Moisture” and why is it so important?

Answer 2

Visible Moisture is considered to be clouds, fog with “visibility of 1sm. or less,” rain, snow, sleet or ice crystal. This enacts the pilot to consider de-icing the aircraft and computing ENG ANTI ICE ON for takeoff.

Question 3

When is it required to turn the ENG ANTI ICE to ON?

Answer 3

1. During taxiing when there’s standing water, slush, ice, or snow on the taxiway and/or runway and icing conditions.
2. Prior to takeoff, when icing conditions exist.
3. During climb and cruise when icing conditions exist from 10°C to 40°C

Question 4

What happens when you select WING ANTI ICE to ON during taxi?

Answer 4

The system will self-test for 30 seconds, and then the valves close until the aircraft takes off.

Question 5

What part of the wing is heated?

Answer 5

Outboard Three Slats

Question 6

During cockpit preparation, what are additional steps during icing conditions?

Answer 6

1. Check the portable system is not frozen.
2. Check the APU intake and pack air. intakes/outlets are clear of snow and ice
3. Parking brake must remain ON in winter conditions until brake release becomes operationally necessary.
4. ECAM display units may need extended warm-up time to turn on.
5. APU BLEED and PACK pbs to ON and ajdust CABIN/FLIGHT DECK temperature selectors as desired to start warming the cabin.
6. Set PROBE/WINDOW HEAT to ON as necessary and turn them to AUTO during after start flows.

Question 7

What is the difference between “pre-takeoff check and pre-takeoff contamination check?

Answer 7

A pre-takeoff check is a simple check of the external surfaces observed inside the cockpit within the hold over time.

A pre-takeoff contaminated check is a more tactile examination of the upper surface wing area observed within the cabin. This is to be completed as soon as the holdover time has expired or when in doubt of the cleanliness of the wing. It is then only valid for 5 minutes.

Question 8

Are pre-takeoff contamination checks allowed during ice pellet conditions?

Answer 8

NO

Question 9

Are we allowed to takeoff in heavy snow conditions?

Answer 9

Yes.

1. Using undiluted type IV fluid
2. Surfaces free of contaminants
3. a thorough PRETAKEOFF CONTAMINATION CHECK within 5 minutes of takeoff

Question 10

Under which conditions does Spirit Airlines prohibit takeoff?

Answer 10

1. Heavy Ice Pellets
2. Moderate and heavy freezing rain
3. Hail
4. Any conditions for which no holdover/allowance times exist

Question 11

At which temperatures are icing conditions most significant in flight?

Answer 11

0°C - 15°C

Question 12

When is an engine run-up required?

Answer 12

During icing conditions and the OAT is 3°C or less.

If significant engine vibration occurs.

Question 13

Can you perform an engine run-up while taxiing single-engine?

Answer 13

Depends. The aircraft must remain stationary, but is permitted during certain operational circumstances.

Question 14

How should you accelerate the thrust for the engine run-up? (V2500/PW1100G)

Answer 14

V2500 engines should be increased to a minimum of 50% N1 at intervals no greater than 15min.

• *PW11OOG** engines should be increased to a minimum of 60% of N1.
• under 30min if OAT 3°C or below but above -9°C
• under 120min if OAT ≤ -9°C

Question 15

For V2500 Engines, what ranges on the engine run-up should be avoided?

Answer 15

61-74% N1

Question 16

What’s the purpose Snowfall intensity chart?

Answer 16

Allows the pilot to determine snowfall intensity as a function of prevailing visibility during snowing conditions alone, using the METAR or REMARKS for HOT determination.