What is required for an airport to qualify as a Takeoff Alternate?

What is required for an airport to qualify as a Takeoff Alternate?

• A. No more than 1 Hour from the departing airport at normal cruise speed with one engine inoperative (Roughly 250 Miles in the CRJ)
• B. No more than 30 Minutes from the departing airport
• C. Within 100 Miles of the departing airport
• D. Requires both engines operative

Answer: (A)

A takeoff alternate is planned to ensure you have a feasible landing option if you can’t continue to the destination after takeoff. The rule uses a one-engine-inoperative performance scenario to define how far that alternate can be from the departure airport. In practice, you must be able to reach the alternate within about one hour of flying time at the speed you would have with one engine out during a normal climb and cruise. This focuses on the most demanding situation right after liftoff, when engine failure is most critical, and ensures you won’t be stranded far from an acceptable landing site. For a CRJ-550, that translates to roughly 250 miles, give or take, depending on weight, altitude, and winds. The key idea is the distance is tied to one-engine-out capability, not to being able to land with both engines operating. The other options don’t fit because they don’t reflect the engine-out constraint or the defined one-hour window. Requiring both engines operative would defeat the purpose of a takeoff alternate, and shorter time or smaller radius figures don’t align with the regulatory standard that ensures a realistic, safe alternate reachable after an engine failure on takeoff.

A takeoff alternate is planned to ensure you have a feasible landing option if you can’t continue to the destination after takeoff. The rule uses a one-engine-inoperative performance scenario to define how far that alternate can be from the departure airport. In practice, you must be able to reach the alternate within about one hour of flying time at the speed you would have with one engine out during a normal climb and cruise. This focuses on the most demanding situation right after liftoff, when engine failure is most critical, and ensures you won’t be stranded far from an acceptable landing site.

For a CRJ-550, that translates to roughly 250 miles, give or take, depending on weight, altitude, and winds. The key idea is the distance is tied to one-engine-out capability, not to being able to land with both engines operating.

The other options don’t fit because they don’t reflect the engine-out constraint or the defined one-hour window. Requiring both engines operative would defeat the purpose of a takeoff alternate, and shorter time or smaller radius figures don’t align with the regulatory standard that ensures a realistic, safe alternate reachable after an engine failure on takeoff.