What was found
AT AN ANNUAL INSPECTION AND C/W AD 77-13-21, PART (A), 1,000-HOUR LANDING GEAR CHECK PER PIPER SL 782-B DATED 12-1-77. LEFT GEAR WAS DISASSEMBLED FOR INSPECTION. OWNER TOLD MECHANIC ABOUT A POSSIBLE AD COMING ABOUT ON PN 22512-00 STUDS. PERFORMED A LIQUID N.D.T. ON BOTH MAIN LANDING GEAR STUDS. LEFT ONE SHOWED GOOD, BUT FOUND CRACKED WITH MAGNAFLUX CHECK.