Inventory (Tables)

6 Months Ended

Nov. 30, 2011

Inventory

Summary of inventories

	November 30,		May 31,
	2011		2011
Raw materials and parts	$	60,465	$	61,314
Work-in-process	67,090		51,725
Purchased aircraft, parts, engines and components held for sale	298,496		250,360
	$	426,051	$	363,399