As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TURNED BATTERY MASTER (AC) ON AND AFTER 40 SEC, SMELLED A STRONG ELECT, BURN SMELL AND A LITTLE SMOKE BY THE TILLER. RAN AIRCRAFT AC SYSTEM ON GROUND, COULD NOT DUPLICATE PROBLEM. PULLED OUT TILLER AND INSP, NO DEFECTS NOTED. OPS CHECKS NORMAL AT THIS TIME IN IAW AMM. A/C OK FOR SERVICE.