Narrative:

On taxi out, we had a few system distrs that contributed to the problem. We were told to taxi to runway 24R and we requested runway 24L and received that clearance. We were holding short of runway 24L at taxiway U which is off of runway 28. We were cleared for takeoff and my first officer was flying and we started down the runway. I realized the mistake at the same time the tower said we were on runway 28 instead of runway 24L. I aborted the takeoff at about 50 KTS. We checked the brake temperature and it was very low and we taxied to runway 24L for takeoff. In conclusion, I am at fault and I was distraction by events leading up to the takeoff and we failed to check the runway alignment with aircraft heading. I consider this a very serious event. I hope I never make this mistake again.

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Original NASA ASRS Text

Title: SUPER MD80 FO MISTAKENLY STARTED TKOF ON THE WRONG RWY DUE TO THE CONVERGENCE WITH THE RWY TO WHICH HE WAS CLRED FOR TKOF. THE CAPT NOTICED THE MISTAKE AT THE SAME TIME THE TWR CTLR ALERTED THE FLC RESULTING IN AN IMMEDIATE ABORTING OF THE TKOF.

Narrative: ON TAXI OUT, WE HAD A FEW SYS DISTRS THAT CONTRIBUTED TO THE PROB. WE WERE TOLD TO TAXI TO RWY 24R AND WE REQUESTED RWY 24L AND RECEIVED THAT CLRNC. WE WERE HOLDING SHORT OF RWY 24L AT TXWY U WHICH IS OFF OF RWY 28. WE WERE CLRED FOR TKOF AND MY FO WAS FLYING AND WE STARTED DOWN THE RWY. I REALIZED THE MISTAKE AT THE SAME TIME THE TWR SAID WE WERE ON RWY 28 INSTEAD OF RWY 24L. I ABORTED THE TKOF AT ABOUT 50 KTS. WE CHKED THE BRAKE TEMP AND IT WAS VERY LOW AND WE TAXIED TO RWY 24L FOR TKOF. IN CONCLUSION, I AM AT FAULT AND I WAS DISTR BY EVENTS LEADING UP TO THE TKOF AND WE FAILED TO CHK THE RWY ALIGNMENT WITH ACFT HDG. I CONSIDER THIS A VERY SERIOUS EVENT. I HOPE I NEVER MAKE THIS MISTAKE AGAIN.

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.