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INVENTORIES
6 Months Ended
Sep. 30, 2011
Inventory Disclosure [Abstract] 
INVENTORIES
INVENTORIES
Inventories are stated at the lower of cost (average cost or specific identification methods) or market. The components of inventories are as follows:
 
September 30, 2011
 
March 31, 2011
Raw materials
$
51,068

 
$
72,174

Work-in-process, including manufactured and purchased components
847,704

 
805,642

Finished goods
40,743

 
42,104

Less: unliquidated progress payments
(121,389
)
 
(138,206
)
Total inventories
$
818,126

 
$
781,714