I thought I'd take a shot at this one.  It depends if A2 had ever established control over the ball.  If it is a straight misplay with no player control, ball is out of bounds to B, with A getting the AP arrow.  (I am assuming when you say that A1 tips to A2 it was a jump ball situation, either opening tip or OT) 
 
Further reading leads to 4-3-3c, which states that the "initial direction of the possession arrow is set toward the opponents basket when the ball has been placed at the disposal of the thrower after a violation during or following the jump before a player secures control."  If A2 never was holding the ball, player control was never established under 4-12-1 and 4-3-3 applies. 
 
Ball to B, AP to A. 
[This message has been edited by Hawks Coach (edited February 27, 2000).] 
 
[This message has been edited by Hawks Coach (edited February 27, 2000).]
		 
		
		
		
		
		
		
		
		
	
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