What was found
JFK - FLT 0050 - AFTER TAKEOFF DFW DURING CLIMB-OUT THROUGH FL 250, VIBRATION NOTED BY F/A'S IN AREA OF PASSENGER SEAT ROWS 25 TO 34. NO OTHER ABNORMAL INDICATIONS AND AIRCRAFT PROCEEDED TO JFK LANDING WITHOUT INCIDENT. REPLACED CENTER LANDING GEAR RT DOOR AFT TRIPOD FITTING. ACCOMPLISHED CENTER LANDING GEAR RETRACTION CHECK WITH NO DEFECTS FOUND. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)