When would Exemption 17347 apply?

When would Exemption 17347 apply?

• A. Used if TAF or METAR for destination and/or 1st Alternate show conditional words such that the weather for either could be less than the authorized minimums
• B. Used if TAF or METAR forecast winds exceed 50 knots
• C. Used when second alternate is not available
• D. Used when there is no METAR available

Answer: (A)

Exemption 17347 is about how we handle weather minimums when the forecast includes conditional language. It allows dispatch with weather that could be below the authorized minimums at the destination or the first alternate, but only if the TAF or METAR contains conditional wording that implies those conditions could improve to meet the minimums or remain within acceptable limits. In practice, you’re looking for forecast phrases like TEMPO, PROB, or BECMG that signal the weather could change in a way that would let the flight meet the required minimums, even though the current observation or forecast might be below them. That’s why this option is the best choice: it directly ties the exemption to conditional forecast language for the destination or first alternate, indicating the weather could fall below minimums but may improve. The other scenarios—winds over a certain threshold, the second alternate not being available, or no METAR being available—do not define the conditions under which Exemption 17347 can be applied.

Exemption 17347 is about how we handle weather minimums when the forecast includes conditional language. It allows dispatch with weather that could be below the authorized minimums at the destination or the first alternate, but only if the TAF or METAR contains conditional wording that implies those conditions could improve to meet the minimums or remain within acceptable limits. In practice, you’re looking for forecast phrases like TEMPO, PROB, or BECMG that signal the weather could change in a way that would let the flight meet the required minimums, even though the current observation or forecast might be below them.

That’s why this option is the best choice: it directly ties the exemption to conditional forecast language for the destination or first alternate, indicating the weather could fall below minimums but may improve. The other scenarios—winds over a certain threshold, the second alternate not being available, or no METAR being available—do not define the conditions under which Exemption 17347 can be applied.