As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOFEATHER FAILED TO ARM WITH POWER LEVERS IN RATING DETENT. ABORTED THE TAKE OFF AT 50 KNOTS. REMOVED FROM SERVICE. COMPLIED WITH EMU DOWNLOAD IAW MTC 6773101 AND COMPLIED WITH AN OPS TEST OF THE PROPELLER AND UP TRIM SYSTEM IAW AMM 61-20-00-710-801, OPS TESTED GOOD NO DEFECTS NOTED. RETURNED TO SERVICE.