Cold Weather

Question 1

Cold Wx WDR Considerations
- Icing conditions
- FLEX limitations
- Derate limitations

Answer 1

• Icing conditions (< 10° & vis moisture)
  
  • Must see “TO A/I PENALTIES APPLIED”
    
    • Indicates CAI penalties applied < 10°C
    • Indicates CAI & WAI penalties applied < 5°C
• FLEX Prohibited when:
  
  • Cowl or Wing A/I required
  • Contaminated rwy (standing water, slush, or snow) regardless of temp
• Derate (TO-1, TO-2) prohibited on an icy runway

Question 2

Aircraft contamination that prohibits takeoff

Answer 2

Frost, ice, snow, or slush adhering to:
- wings
- control surfaces
- engine inlets
- other critical surfaces

Question 3

If the approach and landing are made in icing conditions with FLAP 5, you must:

Answer 3

Add 5 knots directly to VREF, NOT in the wind additive box.
Also add 5 knots to both VAC and VGA in the Go-Around section at the bottom of the PERF-ARR tab