What was found
THE BOLT, PN AN 24-30, THAT ATTACHES THE NOSE GEAR DOOR ROD ASSEMBLY TO THE NOSE STRUT WAS INSTALLED WITH THE HEAD INBOARD. THIS ALLOWED THE NUT AND THREADED END OF THE BOLT TO RUB THE LEFT SIDE OF THE NOSE GEAR WELL BOX, DURING RETRACTION. A REPAIR WAS MADE TO THE BOX AND THE BOLT WAS INSTALLED CORRECTLY. A CAUTION PLACARD WAS INSTALLED ON THE STRUT NEXT TO THE BOLT. SUBMITTER RECOMMENDED LEARJET REVISE THE MM TO INCLUDE A CAUTION AND A SB TO INSTALL A PLACARD ON ALL LEAR 20 SERIES, 31''S, 35''S, AND 55''S. REF: W31 IPC PG 32-23-05. (X)