What was found
(CAN) WHILE CARRYING OUT INSP CALLED UP IN "B" CHECK TECHNICIAN NOTICED CRACK IN RADIUS OF RT FWD DRAG ANGLE P/N 215-30031-59. INSPECTION OF OTHER DRAG ANGLES ON SAME A/C REVEALED FWD LT DRAG ANGLE WAS CRACKED IN SAME AREA. CRACK LENGTH ON BOTH LT & RT DRAG ANGLES APPROX 1.5 IN IN LENGTH. REMAINING 3 A/C WERE INSP & NO FAULTS WERE NOTED. DRAG ANGLES WERE PREV REWORKED TO ALLOW COMPLIANCE WITH SB 215-A463 (AD CF-93-07) ON LOWER WING SPARTANG. SB STATES SHOULD BE 0.750 RADIUS FOR CUTOUT. THESE RADII WERE TIGHTER THAN INSTRUCTIONS & ARE VISIBLE SIGNS OF MACHINING MARKS. AFFECTED DRAG ANGLES WILL BE REPLACED WITH NEW PARTS.