What was found
(CAN) BOLTS ORDERED FROM CESSNA AIRCRAFT COMPANY UNDER PROPRIETARY PN S346151 WERE RECEIVED AND DETERMINED TO BE INCORRECT. THE ORIGINAL BOLTS REMOVED FROM THE ENGINE MOUNT INSTALLATION WERE STAMPED WITH PN NAS464P864. REPLACEMENT BOLTS ORDERED FROM CESSNA UNDER PN S346151 WERE RECEIVED AND FOUND STAMPED WITH P/N NAS6208-64D AND PHYSICAL INSPECTION SHOWED THAT THEY WERE .125 LONGER THAN THE ORIGINALS. CESSNA CITATION CUSTOMER SUPPORT OFFICE WAS CONTACTED TO DETERMINE IF THE BOLTS WOULD BE ACCEPTABLE TO INSTALL WITH THE ADDITION OF EXTRA WASHERS. CESSNA ENGINEERS CONSULTED ENGINEERING DRAWING PN 6550000 AND DETERMINED THAT PN NAS464P864 WAS THE ONLY CORRECT PN. CESSNA ENGINEERING ADVISED THAT THEY WOULD CONTACT