In the case of in-flight depressurization, what is the minimum fuel quantity a turboprop aircraft must have upon arrival at an alternate airfield?

In the event of in-flight depressurization, it is critical for a turboprop aircraft to have a minimum fuel quantity upon arrival at an alternate airfield that is equivalent to at least 30 minutes of flying time. This guideline ensures that the aircraft has adequate fuel to safely reach the alternate airfield, manage any potential delays, and conduct a go-around if necessary.

Having at least 30 minutes of fuel reserves is a standard safety measure, allowing for various contingencies such as unexpected weather conditions or the need for additional maneuvering during the landing approach. This provision is particularly important during an emergency situation like depressurization, where pilots may need to operate under heightened stress and limited operational flexibility.

In contrast, requirements for one hour of flying time or sufficient fuel for a diversion may exceed the minimum safety buffers typically mandated for such scenarios. Furthermore, while having sufficient fuel for an emergency landing is crucial, it may not specifically account for the complexities of diverting to an alternate airfield under the specific circumstances of depressurization.