As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PITOT PROBE HEAT WARNING LIGHTS DID NOT COME ON WHEN SWITCHES TURNED OFF. RECALL CHECK WAS OKAY. LIGHT CAME ON WHEN POWER SWITCHED TO APU. CYCLED "B" PROBE HEAT SWITCH ON & OFF NUMEROUS TIMES. PROBE HEATER IND LIGHTS OPS CHECK GOOD. REF M/M FIM TASK 30 31 00 810 807.