As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF AT PHX EN ROUTE FOR OAK WHEN POWER LEVERS WERE ADVANCED THE TAKEOFF WARNING HORN SOUNDED. TAKEOFF THRUST NEVER ACHIEVED, REJECTED TAKEOFF 10-20 KTS. TAXIED OFF RUNWAY AND CHECKED SETTINGS, EVERYTHING APPEARED NORMAL. RESET SPEED BRAKE LEVER IN DOWN DETENT, SUBSEQUENT TAKEOFF NORMAL.