Narrative:

Cleared to 'line up and wait behind' previous aircraft on runway 25 at intersection ba; then previous aircraft takeoff clearance was canceled as we taxied into position from the intersection behind the aircraft taking off. Then tower questioned why we were on the runway behind the aircraft. We responded that that was our clearance to line up and wait behind. Tower then cleared other aircraft for take off and we encountered some jet blast as he rolled downfield. Then after a few minutes we were cleared for take off without any further incident. Filing the report because the controller's instruction to line up and wait 'behind' did cause some confusion and then we were questioned by the tower.

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Original NASA ASRS Text

Title: An air carrier Captain erroneously taxied into position behind a departing aircraft at LIRF after mistaking the Tower's 'Line Up and Wait behind' for 'Line Up and Wait.'

Narrative: Cleared to 'Line Up and Wait behind' previous aircraft on Runway 25 at Intersection BA; then previous aircraft takeoff clearance was canceled as we taxied into position from the intersection behind the aircraft taking off. Then Tower questioned why we were on the runway behind the aircraft. We responded that that was our clearance to line up and wait behind. Tower then cleared other aircraft for take off and we encountered some jet blast as he rolled downfield. Then after a few minutes we were cleared for take off without any further incident. Filing the report because the Controller's instruction to line up and wait 'BEHIND' did cause some confusion and then we were questioned by the Tower.

Data retrieved from NASA's ASRS site as of April 2012 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.