As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COLLINS 4200 FMS. KEYS ON KEYBOARD ARE WORE OUT AND WHEN YOU TYPE THE KEYS REPEATS THE SAME NUMBER OR LETTER, 2 TO 3 TIMES. COMPANY REFUSES TO FIX THEM. IMO THIS IS A SAFETY OF FLIGHT ISSUE. ALL AIRCRAFT IN FLEET HAVE THIS PROBLEM. 405-471AW