This is the verbiage taken directly from Bell Helicopter Operations Safety Notice relating to control abuse
13 SEPTE"MBER 1976
OSN GEN-76-4
ALL OPERATORS
HEAVY LIFT, AFT CENTER OF GRAVITY, PROLONGED HOVER, CYCLIC CONTROL ABUSE
IN-FLIGHT PILOT HANDLING TECH#NIQUES ARE BEING ADDRESSED HERE AS THEY DIRECTLY RELATE TO ABNORMAL DRIVE SHAFT DEFLECTION.
OBSERVATION OF 205A-l FIELD FLIGHT OPERATIONS BY BHT PERSONNEL, IN WHICH INTERNAL AND EXTERNAL LOADS WERE INVOLVED SHOWED A NEARLY CROSS-THE-BOARD ABUSE OF CYCLIC CONTROL DURING OGE HOVERING, TAKE-OFFS AND ON PRECISION APPROACHES. THE GREATEST CONTROL ABUSE WAS INVOLVED DURING VERTICAL REFERENCE WORK, WHERE PILOTS FOUND THAT EXTREMELY LARGE, FAST CYCLIC DISPLACEMENTS WOULD ALLOW THE SAME PRECISION IN OGE HOVERING WORK AS WOULD NORMAL, GENTLE CYCLIC DISPLACEMENTS. THOUGH IT MAY BE EASIER TO FLY IN THIS MANNER THE CONSTANT ABNORMAL PYLON MOTION INDUCED BY THE OVER-CONTROLLING MAY EXCEED DRIVE SHAFT DEFLECTION LIMITS AND CREATE A POTENTIAL HAZARD OF PREMATURE ENGINE TO TRANSMISSION DRIVE SHAFT FAILURE.
PILOTS MUST CONSCIENTIOUSLY ADHERE TO NORMAL CONTROL MOVEMENTS. DO NOT ALLOW STICK STIRRING OR CONSTANT ABRUPT INPUTS TO CREATE A POTENTIALLY DANGEROUS SITUATION. IT NOT ONLY REFLECTS POOR PILOT CONTROL STICK TECHNIQUES BUT COULD RESULT IN UNNECESSARY INJURY TO BOTH PERSONNEL AND EQUIPMENT.