What was found
JFK - FLT 661 - DURING DEPARTURE OF THE FLIGHT LR661 (JFK-SJO), THE AIRCRAFT WAS PARKED AT THE DELTA TERMINAL NR 2, GATE 27, WHILE THE TRACTOR DRIVER WAS POSITIONING TO PUSH-BACK HE HIT THE TOW BAR AND IT BOUNCED INTO THE AIRCRAFT, CAUSING A 3.5 INCH HOLE ON THE BOTTOM LEFT SIDE ON THE NOSE FUSELAGE. THE FLIGHT WAS CANCELED. MAINTENANCE TECHS PERFORMED EVALUATION OF THE DAMAGE. FOUND A CRACK OF ABOUT 3.5 INCHES LOCATED BETWEEN FRAMES 18 TO 19 NEAR THE LEFT LOWER STRINGER AT THE LOWER SIDE OF A BUTT JOINT. NDT INSPECTION DID NOT REVEAL