Transdigm Holding 10-K 2002 FY Annual report

EXHIBIT 12.1

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(Dollars in Thousands)

	1998		1999			2000		2001		2002
Earnings:
Total earnings (loss)	$	14,137	$	(16,917	)	$	10,779	$	14,358	$	30,629
Income tax provision (credit)		12,986		(2,772	)		7,972		9,386		16,804
Pre-tax earnings (loss)		27,123		(19,689	)		18,751		23,744		47,433
Fixed charges:
Interest charges		3,175		22,722			28,563		31,926		36,538
Interest factor of operating rents		197		227			323		365		419
Total fixed charges		3,372		22,949			28,886		32,291		36,957
Earnings as adjusted	$	30,495	$	3,260		$	47,637	$	56,035	$	84,390
Ratio of earnings to fixed charges (1)		9.0		0.1			1.6		1.7		2.3

(1) In fiscal 1999, earnings were insufficient to cover fixed charges by $20.

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