Narrative:

From the hold short line for runway 22 at eau, we proceeded into position on the runway and completed the before takeoff checklist to the boxed items. I called for boxed items and the speed levers were advanced to 100%. Once the power levers were advanced from beta to the flight idle position, the aft veered toward the right side of the runway. I immediately responded by saying, 'I've got the controls,' and applied full left brakes, full left steering and full reverse with speeds 100%. All of my efforts were to no avail as the aircraft slid off the runway completely out of my control. The runway was covered with snow over ice and braking was reported as poor by airport authorities. I regained control after striking a runway light with the left propeller. We proceeded back to the gate and shut down the right engine to prevent any possible further damage. This incident was caused by differential thrust because the right propeller was not off the start locks. This, combined with a very slick runway surface, led to a damaged propeller. All checklists were completed, yet inherent to the light transport design, only 1 power lever (in this case the left one) is required to taxi. I recommend that confirmation of the propellers being 'off' the start locks be incorporated into the taxi checklist as well as the after start check.

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Original NASA ASRS Text

Title: COMMUTER FLT CREW EXPERIENCES LOSS OF ACFT CTL AT BEGINNING OF TKOF RUN.

Narrative: FROM THE HOLD SHORT LINE FOR RWY 22 AT EAU, WE PROCEEDED INTO POS ON THE RWY AND COMPLETED THE BEFORE TKOF CHKLIST TO THE BOXED ITEMS. I CALLED FOR BOXED ITEMS AND THE SPD LEVERS WERE ADVANCED TO 100%. ONCE THE PWR LEVERS WERE ADVANCED FROM BETA TO THE FLT IDLE POS, THE AFT VEERED TOWARD THE RIGHT SIDE OF THE RWY. I IMMEDIATELY RESPONDED BY SAYING, 'I'VE GOT THE CTLS,' AND APPLIED FULL LEFT BRAKES, FULL LEFT STEERING AND FULL REVERSE WITH SPDS 100%. ALL OF MY EFFORTS WERE TO NO AVAIL AS THE ACFT SLID OFF THE RWY COMPLETELY OUT OF MY CTL. THE RWY WAS COVERED WITH SNOW OVER ICE AND BRAKING WAS RPTED AS POOR BY ARPT AUTHORITIES. I REGAINED CTL AFTER STRIKING A RWY LIGHT WITH THE LEFT PROP. WE PROCEEDED BACK TO THE GATE AND SHUT DOWN THE RIGHT ENG TO PREVENT ANY POSSIBLE FURTHER DAMAGE. THIS INCIDENT WAS CAUSED BY DIFFERENTIAL THRUST BECAUSE THE RIGHT PROP WAS NOT OFF THE START LOCKS. THIS, COMBINED WITH A VERY SLICK RWY SURFACE, LED TO A DAMAGED PROP. ALL CHKLISTS WERE COMPLETED, YET INHERENT TO THE LTT DESIGN, ONLY 1 PWR LEVER (IN THIS CASE THE LEFT ONE) IS REQUIRED TO TAXI. I RECOMMEND THAT CONFIRMATION OF THE PROPS BEING 'OFF' THE START LOCKS BE INCORPORATED INTO THE TAXI CHKLIST AS WELL AS THE AFTER START CHK.

Data retrieved from NASA's ASRS site as of July 2007 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.