As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THREE AIRCRAFT ALL IN PIPER COMANCHE FAMILY HAVE BEEN FOUND TO HAVE COTTER PIN EARS BROKEN OFF ON CLEVIS PIN THAT CONNECTS BRAKES TO PEDALS. ONE AIRCRAFT WAS ABOUT TO TAKE OFF AND RETURNED TO FACILITY AFTER NOTICING THEY HAD LOST BRAKES (FURTHER FOUND TO BE BROKEN COTTER PIN. PICTURE OF DEFECT AVAILABLE UPON REQUEST.