Narrative:

Aircraft X was cleared for takeoff at the A2 intersection of runway 21; aircraft Y was later cleared for takeoff at the A6 intersection of runway 21 before a verified time of 3 minutes had elapsed for wake turbulence.no recommendations for change; better awareness by the local controller of aircraft sizes and use of established memory aids would have prevented this issue.

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Original NASA ASRS Text

Title: GTF Local Controller reported failing to follow wake turbulence separation standards for two departing aircraft.

Narrative: Aircraft X was cleared for takeoff at the A2 intersection of RWY 21; Aircraft Y was later cleared for takeoff at the A6 intersection of RWY 21 before a verified time of 3 minutes had elapsed for wake turbulence.No recommendations for change; better awareness by the local controller of aircraft sizes and use of established memory aids would have prevented this issue.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.