CH5 Abnormal Procedures

Question 1

Lost communications 91.185

Answer 1

If in VMC or if VMC is encountered after failure:
Land as soon as practical

While in IMC

• —> Route:
  1. Assigned route
  2. Vectors
  3. Expected route
  4. Flight planned route
• —> Altitude: (highest of the three, until reaching IAF or IF as applicable)
  1. Minimum IFR altitude (MEA/MOCA)
  2. Expected altitude
  3. Assigned altitude

Question 2

What constitutes hazardous windshear? And below what altitude should the crew initiate windshear recovery procedures if encountered?

Answer 2

Wind vector change of more than 20kts in less than 2.5nm, or; vertical shear of 500fpm or more is to be considered hazardous during any phase of flight.

Windshear recovery procedures if encountered below 1500’

Question 3

In which situations can vertical shears be expected?

Answer 3

Thunderstorms, microbursts, fronts, virga, mountain waves, rainshowers, blowing dust, and inversions.

Question 4

Situations that require a missed approach/go-around while IFR and inside the FAF on an IAP

Answer 4

• > 3/4 scale deflection on CDI
• When aircraft is not in a position to make normal landing
• Flight visibility decreases below approach mins
• Visual contact with landing runway is lost (straight-in)
• Visual contact with any identifiable part of the airport is lost during a circling approach (except for due to normal banking of the aircraft)

Question 5

VFR go around shall be initiated if any of the following occur

Answer 5

1. ATC issued
2. Hazard on runway
3. Overtaking aircraft ahead
4. Windshear
5. Significant wake turbulence
6. Destabilized approach