Brief Description: Anti-Servo Tab Service Bulletin
Removed the anti-servo tab and inspected the HS-1221 AST skin. No cracks noted. Drilled out rivets and removed the inboard ribs. Match-drilled #30 holes per the SB. Deburred and primed the HS-1230 left and right ribs. Drilled out the rivets attaching the HS-1220 AST Control Horns to the HS-1222 ribs.
