What was found
WHEN MAKING A TIGHT TURN USING RUDDER AND BRAKES, THE BRAKE PEDALS GO TO THE FLOOR WITHOUT BRAKING. THIS OCCURS BOTH IN RT AND LT TURNS AND IS FELT FROM BOTH PILOT & CO-PILOT PEDALS. BRAKING FEELS NORMAL WHEN MAKING SHALLOW TURNS OFF AND ON THE RUNWAY, BUT THE PROBLEM IS WHEN THE ACFT NEEDS TO MAKE A 90 DEGREE TURN AND THE PEDAL IS FLOORED. FOUND RUDDER PEDALS COULD BE MOVED TO AREA OF FORWARD DETENT WHICH SHOULD NOT BE AVAILABLE ON THIS ACFT. FOUND SB 560XL-27-28 HAD NOT BEEN C/W. BRAKE PEDALS WILL CONTACT BULLHEAD IN THIS CONDITION IF IN HARD TURN. PEDALS WILL NOT CONTACT BULKHEAD. BRAKE SYS OPS CHECK GOOD IAW MM 32-44-10.