As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: UPON APPLYING TAKEOFF POWER. A HEAVY DIRTY SOCK-SMELL FILLED THEFLIGHT DECK THRU THE GASPERS AND FORWARD AND AFT CABIN AND LINGERED FOR 15 MIN AFTER TAKEOFF. SMELL DISSIPATED AT CRUISE SAT TO DFW. MAINTENCE COULD NOT FIND ANY SOURCE OF ODOR.