Alternates

Question 1

Adequate Airport (3)

Answer 1

• Runway Length is sufficient to meet performance (Takeoff and Landing).
• Airport Rescue and Fire Fighting category compatible with aircraft.
• Pavement class is compatible with aircraft weight.

Question 2

Suitable Airport

Answer 2

Airport Adequate for CPA operations.

Cx Def: Adequate airport complying with EDTO Flight dispatch weather minima criteria.

Question 3

When is a takeoff alternate required?

Time and distance?

Answer 3

When takeoff weather conditions at the departure airport are below the published ILS landing minima or the minima for the approach aid in use (if no ILS available)

2 hours flight time at all engine operating cruise speed

960NM

Question 4

Weather conditions required at takeoff alternate?

Answer 4

Shall be at or above the CAT1 landing minima (or the minima for the approach aid in use, if no ILS available)

Question 5

Destination Weather below landing minima, or Forecast not available?

Answer 5

Two destination alternates must be selected
-Weather must meet the criteria for filing as a destination alternate.
Fuel shall be planned to permit diversion to the most distant of the two selected alternates.

Question 6

Calculation of Minima for filing as alternate?

One available approach to a suitable runway?

Two (or more) available approaches to separate, suitable runways?

Answer 6

One approach: Add 400’ to DA/MDA, add 1SM to the published visibility or RVR

Two approach: Add 200’ to DA/MDA, add 1/2SM to the published visibility or RVR. (To the more restrictive approach)

*LVO may not be used as a basis

Question 7

Weather Validity period for destination alternates, CFP nominated alternates and Takeoff alternates?

Answer 7

60 minutes before until 60 Minutes the expected ETA

Question 8

Weather requirements at ERA’s?

Answer 8

At, or above, LANDING MINIMA. Crosswind within limits.

PROB of less than 40% may be ignored.

Question 9

What is an Isolated Airport?

Answer 9

A destination airport that does not have an acceptable alternate aerodrome within 1 hour and 45 minutes of the destination.

Question 10

Requirements to waive alternate for an isolated airport?

Weather?

Fuel?

Answer 10

• Forecast weather conditions for 30 minutes before to two hours after ETA (including TEMPO, INTER and PROB) must be at or above “Minima for filing as an alternate”
• Alternate and Reserve Fuel are substituted by 2 hours holding fuel, at normal cruise consumption, overhead the destination airport.

Question 11

748 must remain within what time of an Adequate Airport?

Answer 11

180 Minutes

1470NM

Question 12

After Dispatch minima to be used?

Answer 12

Landing minima shall be used to assess the continued adequacy of any airport.