As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOI FLIGHT NR 2202 - DURING NR 1 BETA LOCK-OUT TEST PROP GROUND RANGE LIGHT ILLUMINATES IMMEDIATELY WHEN BRINGING POWER LEVER TO DISC BEFORE PUSHING TEST BUTTON ON PROP RPM GAUGE. MAINTENANCE RESET BETA LOCK-OUT. NO PART REPLACED. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.