As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: PILOT REPORTS ON T/O ROLL THE AUTO THROTTLES TURNED OFF TWICE AND WE COULD NOT ENGAGE V NAV AT 1000FT. TRIED THE AUTOTHTOTTLES AGAIN AT 1500 FT AND THEY STAYED ON AND VNAV WORKED OK. AUTO THROTTLES QUIT AGAIN AND VNAV QUIT AT 3000FT IN DECENT WITH A 2 KNOBS THROTTLE SPLIT. MAINTENANCE ACCOMPLISHED AUTOTHROTLES BITE TEST IAW FIM 22-31-00. NO FAULTS NOTED. ALL TEST AND CHECKS NORMAL IAW FIM 22-31-00.