As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MSO FLIGHT NR 2340: NR 2 PROP HEAT INOP ON TAXI. AIRCRAFT RETURNED TO GATE. MAINTENANCE INTERROGATED CDS AND FOUND NO FAULTS. GROUND RAN BOTH ENGINES WITH ALL POWER ONLINE AND PERFORMED FUNCTIONAL TEST OF PROP DEICE SYSTEM IAW AMM 30-60-00. OPS CHECK GOOD. BOTH PROP LIGHTS ILLUMINATE AND LOADS SHOWN ON ELECTRICAL PAGE. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.