Cold Weather Ops

Question 1

Cold weather ops:

Briefing items to consider?

Answer 1

• AOI,
• De-icing at dest,
• Takeoff ALTN,
• tanker/cold fuel.
  Min SAT -70C (SAT -65 for 90mins.)

Question 2

Exterior allowed ice

Answer 2

• <3mm top fuselage/under wing,
• engine cowls frost only,
• fan ice call MOC, brush nose

Question 3

things to consider during taxi out (precipitation)

Answer 3

• min oil temp >-10C for T/O.
• No OETD if slippery,
• flaps up until holding point
• no anti-skid <20kts,
• jet blast
• consider 2nd F/CTL check

Question 4

Ice Shedding

Answer 4

• 70% for 30secs every 30mins
  (A few seconds every 10mins if FZ/+SN.)
• Also before take-off, continue if skidding.

Question 5

Ice Accretion

Answer 5

Unheated: Add 5kts for Flap 3 (VLS+10)

Severe (5mm)/WAI INOP: VLS + 10 or Green Dot

Question 6

Contaminated LDG RWY

Answer 6

Autobrake MED. 
CAT 3A (Rollout not demonstrated.)
Mid RVR 125m. 
No Flap 3. 
Max Rev. 
Captain only

Question 7

RCAM

Runway condition assessment matrix

Answer 7

BA/Info (e.g +RA) may degrade condition
(Except: Treated Ice and airport report BA Medium.)

Unreliable = Unmeasured

Question 8

Taxi In

Answer 8

Keep flaps down if contaminated.
Check clear before retracting.
Consider Ice-Shedding