Spirit AeroSystems International S-4/A Registration of securities issued in business combination transactions (amended)

Exhibit 12.1

Spirit AeroSystems Holdings, Inc.
Computation of Ratio of Earnings to Fixed Charges

	Spirit Holdings																			Predecessor
																	Period from			Period from
							Pro Forma										June 17,			January 1,
	Nine Months						Nine Months										2005			2005		Fiscal Year
	Ended						Ended			Twelve Months Ended							through			through		Ended
	October 1,						October 1,			December 31,		December 31,		December 31,			December 29,			June 16,		December 31,
	2009			Adjustments			2009			2008		2007		2006			2005			2005		2004
	(in millions, except ratios)
Earnings
Pre-tax income from continuing operations before adjustment for noncontrolling interests in consolidated subsidiaries or income or loss from equity investees	$	200.7		$	(5.1	)	$	195.6		$	383.9	$	419.8	$	(71.5	)	$	(76.6	)		N/A		N/A
Add: Fixed Charge (from below)	$	36.5		$	5.1		$	41.6		$	47.0	$	46.6	$	62.1		$	29.4			N/A		N/A
Add: Amortization of capitalized interest	$	1.7		$	—		$	1.7		$	1.5	$	1.0	$	0.2		$	—			N/A		N/A
Add: Distributed income of equity investee	$	(0.2	)	$	—		$	(0.2	)	$	—	$	—	$	—		$	—			N/A		N/A
Subtract Capitalized interest expense	$	5.1		$	—		$	5.1		$	5.4	$	7.5	$	10.3		$	3.0			N/A		N/A
	$	233.6		$	—		$	233.6		$	427.0	$	459.9	$	(19.5	)	$	(50.2	)		N/A		N/A
Fixed charges:
Interest expense (including amortization of debt issuance costs, debt discounts and premiums)	$	29.1		$	5.1		$	34.2		$	39.2	$	36.8	$	50.1		$	25.5			N/A		N/A
Add: Capitalized interest expense	$	5.1		$	—		$	5.1		$	5.4	$	7.5	$	10.3		$	3.0			N/A		N/A
Add: Portion of rentals representing interest (1/3 operating lease payments)	$	2.3		$	—		$	2.3		$	2.4	$	2.3	$	1.7		$	0.9			N/A		N/A
	$	36.5		$	5.1		$	41.6		$	47.0	$	46.6	$	62.1		$	29.4			N/A		N/A
Ratio of earnings to fixed charges		6.4						5.6			9.1		9.9		A			B			N/A		N/A

A)	Due to the registrant’s loss in 2006, the ratio coverage was less than 1:1. The registrant needed to generate additional earnings of $81.6 to achieve a coverage ratio of 1:1.
B)	Due to the registrant’s loss in 2005, the ratio coverage was less than 1:1. The registrant needed to generate additional earnings of $79.6 to achieve a coverage ratio of 1:1.