What was found
AIRCRAFT WAS GROUNDED: FLIGHT CREW REPORTED THAT ON CLIMB THRU FL 200 AT 325 IT'S INDICATED WE GOT FLIGHT CONTROL FLUTTER. WE BROUGHT SPEED BACK AND IT WENT AWAY. FLIGHT ATTENDANTS FELT IT AS WELL. MAINTENANCE REPLACED ALL 6 HINGE FITTINGS ON THE LEFT-HAND ELEVATOR AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 55-16-44. (AALA202512047099 FOR #1 HINGE FITTING, AALA202512152854 FOR #2 HINGE FITTING, AALA202512150132 FOR #3 HINGE FITTING, AALA202512150455 FOR #4 HINGE FITTING, AALA202512158319 FOR #5 HINGE FITTING AND AALA202512159663 FOR #6 HINGE FITTING).