Narrative:

Given taxi into position hold instructions for runway 7L and asked to report preceding traffic; an A320 in sight. Just prior to the aircraft ahead rotating we were cleared for takeoff. A standing takeoff was performed to allow for slightly additional spacing. Rotation point of the A320 was noted as fairly distant down the runway. Our aircraft accelerated sluggishly due to the high weight (1300 pounds below mgtow) and the low thrust setting (85.4%) N1 flx takeoff. Shortly after rotation at V2 plus 12 KTS we encountered wake turbulence from the preceding departure that briefly activated the stick shaker. An offset was made to the right of course and no other substantial turbulence was noted the remainder of the departure. The incident was fairly common for eastbound phx departures other than the activation of the stick shaker. It actually rarely occurs that you encounter any wake turbulence; and in this instance it was only the one jolt that activated the stick shaker. Contributing factors include: failure for flight crew to allow additional spacing between departures; tower controller's rush to get departures out during a departure bank; failure to recognize flight path of the other aircraft and failure to take corrective course action prior to entering the other aircraft's wake.

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Original NASA ASRS Text

Title: CL600 FLT CREW RPTS WAKE TURB ENCOUNTER WITH PRECEDING A320 DEPARTING RWY 7L AT PHX. STICK SHAKER ACTIVATES BRIEFLY.

Narrative: GIVEN TAXI INTO POSITION HOLD INSTRUCTIONS FOR RWY 7L AND ASKED TO RPT PRECEDING TFC; AN A320 IN SIGHT. JUST PRIOR TO THE ACFT AHEAD ROTATING WE WERE CLRED FOR TAKEOFF. A STANDING TKOF WAS PERFORMED TO ALLOW FOR SLIGHTLY ADDITIONAL SPACING. ROTATION POINT OF THE A320 WAS NOTED AS FAIRLY DISTANT DOWN THE RWY. OUR ACFT ACCELERATED SLUGGISHLY DUE TO THE HIGH WT (1300 LBS BELOW MGTOW) AND THE LOW THRUST SETTING (85.4%) N1 FLX TKOF. SHORTLY AFTER ROTATION AT V2 PLUS 12 KTS WE ENCOUNTERED WAKE TURBULENCE FROM THE PRECEDING DEP THAT BRIEFLY ACTIVATED THE STICK SHAKER. AN OFFSET WAS MADE TO THE RIGHT OF COURSE AND NO OTHER SUBSTANTIAL TURBULENCE WAS NOTED THE REMAINDER OF THE DEP. THE INCIDENT WAS FAIRLY COMMON FOR EASTBOUND PHX DEPS OTHER THAN THE ACTIVATION OF THE STICK SHAKER. IT ACTUALLY RARELY OCCURS THAT YOU ENCOUNTER ANY WAKE TURBULENCE; AND IN THIS INSTANCE IT WAS ONLY THE ONE JOLT THAT ACTIVATED THE STICK SHAKER. CONTRIBUTING FACTORS INCLUDE: FAILURE FOR FLT CREW TO ALLOW ADDITIONAL SPACING BETWEEN DEPS; TOWER CTLR'S RUSH TO GET DEPS OUT DURING A DEP BANK; FAILURE TO RECOGNIZE FLT PATH OF THE OTHER ACFT AND FAILURE TO TAKE CORRECTIVE COURSE ACTION PRIOR TO ENTERING THE OTHER ACFT'S WAKE.

Data retrieved from NASA's ASRS site as of January 2009 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.