As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX FLIGHT NR 2241, AUTO FEATHER FAILED TO ARM DURING TAKEOFF. MAINTENANCE TIGHTENED LOOSE ATTACH HARDWARE FOR AUTO FEATHER CONTROLLER ELECTRICAL CONNECTOR 6121-P9 AND REPLACED AUTO FEATHER CONTROL RELAY 6121-K5. AUTO FEATHER SYSTEM AND POWER UPTRIM TEST GOOD SEVERAL TIMES IAW DHC-8-200 MM TASK 71-00-00-868-815, PARAGRAPH 41, PAGES 560-562. AIRCRAFT RETURNED TO SERVICE.