What was found
(CAN) PILOT REPORTED LOUD CLUNK FOR REAR OF AIRCRAFT WHEN CAMERA RETRACTED INTO REAR FUSELAGE. INVESTIGATION REVEALED THAT CAMERA WAS NOT GOING INTO STOW ON THE Y AXIS THUS CAMERA CASE MADE CONTACT WITH THE CAMERA HATCH OPENING . INSPECTION DID NOT REVEAL ANY DAMAGE TO CAMERA CASE NOR THE CAMERA HATCH ON AIRCRAFT. FURTHER INVESTIGATION REVEALED THAT THE Y AXIS MOTOR ASSY GEAR SHAFT HAD SHEARED OFF AND WAS LYING IN BOTTOM OF SIDE PANEL . A SERVICEABLE MOTOR AND GEAR ASSEMBLY INSTALLED IN CAMERA GIMBAL ASSEMBLY ,CAMERA SYSTEM GROUND TESTED SATISFACTORY. (TC# 20190729010)