SUMMARY OF INFORMATION FROM MANUFACTURER:MANUFACTURER CLAIMS THAT AQUALITY CONTROL ERROR TOOK PLACE.EITHER AN IMPROPERLY SIZED RIVET WASINSTALLED TO SECURE THE LINING, OR THE WRONG MANDREL WAS USED TO CRUSHTHE RIVET.THE MANUFACTURER ACTS AS HIS OWN DISTRIBUTOR AND WILL BE ABLETO ACCOUNT FOR ALL OF THE DEFECTIVE SHOES.IT APPEARS THAT ALL OF THEDEFECTIVE SHOES WERE INSTALLED ON SCHOOL BUSES.ANALYSIS:BRAKE SHOES WITH INCORRECT RIVETS MAY ALLOW THE LINING TOSEPARATE WHICH COULD JAM AGAINST THE DRUM.THIS MAY RESULT IN THE WHEELASSEMBLY LOCKING, WHICH COULD LEAD TO A LOSS OF CONTROL OF THE VEHICLE.PROPOSED ACTION:SEND A RECALL REQUEST LETTER.