As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HRL - FLT 3724 - FLIGHT CRWE NOTICED A STRONG ELECTRICAL BURNING SMELL IN THE COCKPIT. AIRCRAFT RETURNED TO GATE, FLIGHT CREW CALLED CFR. NO FIRE WAS FOUND AND PASSENGERS DEPLANED NORMALLY. RAI'D AC GEN BPCU AND GCU. OPS CHECK GOOD. NO FURTHER DEFECTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE. (M)