As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TAT HEAT FAULT. TAT FAULT & ALL THREE PITOT HEAT FAULT ILLUMINATED ON OVERHEAD. REMOVED PROXIMITY SENSOR UNIT AND INSTALLED LANDING GEAR RELAY SIMULATOR SET IAW A310-200 MM 32-00-00-5. LANDING GEAR HANDLE WOULD GO TO FULL UP WITHOUT INTERLOCK AS IT SHOULD. ALL SYSTEMS ASSOCIATED WITH THE ATB OPERATED NORMALLY.