What was found
DISASSEMBLED BOTH MAGS TO COMPLY WITH SB3-08A. PRIOR TO REASSEMBLY MECHANIC NOTED THAT THE MAG ROTOR GEARS (PN M3827) ON BOTH MAGS HAD NUMEROUS CRACKS IN ONE OF THE GEAR TEETH. ORDERED 2 NEW GEARS AND FOUND NUMEROUS CRACKS IN ONE OF THE NEW GEARS AS WELL. ALL 3 GEARS HAD CRACKS IN THE SAME GEAR TOOTH. THE GEARS ARE MARKED WITH A LINE FOR LT AND RT ROTATION. THERE ARE 3 GEAR TEETH BETWEEN THE LT INDEX TOOTH AND THE RT INDEX TOOTH. ALL OF THE CRACKS IN ALL 3 GEARS WERE IN THE TOOTH ADJACENT TO THE LT INDEX TOOTH. THE CRACKS ARE FROM THE TOP LAND OF THE TOOTH INTO THE BOTTOM LAND AND EXTEND A SHORT DISTANCE INTO THE GEAR BODY. LT MAG: MFG 4373 SN 08052105 125.5 HOURS SINCE NEW; RT MAG: MFG 4370, SN 08060556, 125.5 HOURS SINCE NEW; NEW GEAR: AFT PN M3827, PO: T36925, LOT: 30-15310 0.0 HOURS SINCE NEW. BOTH NEW GEARS WERE PACKAGED SEPERATELY AND BOTH PACKAGES HAD THE SAME INFORMATION ON THE TAGS.