What was found
IN THE PROCESS OF REPLACING WORN PULLEYS, WE ORDERED PMA REPLACEMENT PULLEYS, PART NUMBER 41001-10 PULLEYS FROM UNIVAIR THROUGH AIRCRAFT SPRUCE. WE WERE SENT U-41001-8 PULLEYS WHICH WERE REPRESENTED AS BEING FAA/PMA REPLACEMENTS. HAVING A -8 SUPERSEDING A -10 PART NUMBER SEEMED ODD TO ME SO I CONTACTED RALMARK WHICH IS THE MANUFACTURER OF THE PULLEY. THEY INFORMED ME THAT THE 41008-08 HAS A SIDE LOAD LIMIT OF 200 LBS. THE 41008-10 HAS A SIDE LOAD LIMIT OF 280 LBS. AT THE TIME, THE ONLINE UNIVAIR PARTS CATALOG INDICATED THAT THE 41001-10 SUPERSEDES TO A U-41008-08. I THEN CONTACTED UNIVAIR AND THEY TOLD ME THAT THE -8 DOES SUPERSEDE THE -10. WHEN I EXPLAINED WHAT RALMARK SAID, UNIVAIR THEN RESEARCHED THEIR FAA/PMA APPROVAL AND TOLD ME THAT THE -8 IS NOT A REPLACEMENT FOR THE -10. THE UNIVAIR ONLINE CATALOG HAS NOW BEEN CORRECTED. STILL SHOWS THE 41008-08 IS A REPLACEMENT FOR A 41008-10. ALTHOUGH WE HAVE THE CORRECT PART NUMBER PULLEYS FOR THIS AIRCRAFT, MY CONCERN IS THAT THIS INCORRECT SUPERSEDED PULLEYS HAVE BEEN INSTALLED FOR DECADES IN THE PIPER SERIES AIRCRAFT.