As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX- WHEN BRAKES APPLIED DURING TAXI, LOUD SQUEAL HEARD IN COCKPIT AND CABIN. C/W VISUAL INSPECTION AND FOUND NR 1 MAIN WHEEL DRIVE KEYS NOT ALIGNED WITH BRAKE SLOTS. REMOVED MAIN WHEEL ASSY. AND VISUALLY INSPECTED BRAKE AND WHEEL ASSYS. NO DEFECTS NOTED. REALIGNED BRAKE SLOTS AND REINSTALLED WHEEL REF TASK CARD R324101. A/C O.K. FOR SERVICE. NO PARTS REPLACED.