As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX- ON FLIGHT 2147 AUTOFEATHER "ARM" LIGHT CAME ON DURING TAKEOFF AT 95 PERCENT TORQUE AND 70 KIAS. PERFORMED AUTOFEATHER ARMING POTENTIOMETER ADJUSTMENT TEST IAW RIGGING MANUAL 7-31. NO PARTS REPLACED. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.