What was found
DURING THE SCHEDULED MAINTENANCE (E1 CHECK) THE MECHANIC WORKING ON RUDDER TOGGLE LINKS LUBRICATION WAS USING BOOM LIFT; THE UNDERLINE OF THE LIFT BOUNCED SLIGHTLY, CONTACTING THE UPPER PAINTED DORSAL SURFACE OF THE HORIZONTAL STABILIZER LEAVING A SCRATCH /DENT OF L=12.6 IN W= 2.5 IN D= 0.1210 IN; STOPPED MAINTENANCE ACTION AND NOTIFY ENGINEERING AND MX CONTROL FOR EVALUATION OF A DAMAGE AND A POSSIBLE MAINTENANCE ACTION, RH HSTAB DENT AT MID SPAR AND RIB 7 REPAIRED PER RO# E175-55-4102