As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A/C DEPARTED HNL ABOUT 1/2 WAY THRU FLIGHT CREW NOTICED ACRID BURNING ODOR. CREW FIGURED IT WAS A/C BELT SO CONTINUED ON WITHOUT RUNNING THE A/C, SMELL CAME BACK SO CREW TURNED OFF OVERHEAD AIR VENTS. TURNED BACK ON THE AIR VENTS AND SMELL CAME BACK SO CREW DIVERTED TO MOLOKAI