As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - FLIGHT 2357 AUTOFEATHER SYSTEM FAILS TEST. INSPECTED POWER LEVER SWITCHES 6121-58 AND 6121-59 AND FOUND THAT 6121-58 WAS NOT ADJUSTED QUITE TIGHT ENOUGH. ADJUSTED POWER LEVER SWITCH 6121-58 IAW -8 200, ENGINE RIG MANUAL 1-82ER, PART 7, PARAGRAPH 4-4D. PERFORMED AUTOFEATHER SYSTEM AND POWER UPTRIM TEST. OPERATIONAL CHECK GOOD. NO DEFECTS NOTED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.