10.	Customer Concentration

Direct sales, through both of its business segments, to the Company's largest customer, The Boeing Company ("Boeing"), accounted for 20.1% and 16.9% of the Company's total revenues for the three months ended June 30, 2012 and 2011, respectively. Direct sales to Boeing accounted for 20.3% and 17.4% of the Company's total revenues for the six months ended June 30, 2012 and 2011, respectively. Accounts receivable balances based on direct sales related to Boeing were 14.6% and 15.6% of the Company's total accounts receivable balance at June 30, 2012 and December 31, 2011, respectively.

Direct sales, through its Aerostructures segment, to the Company's second largest customer, Gulfstream Aerospace Corporation, a General Dynamics company ("Gulfstream"), accounted for 16.8% and 16.5% of the Company's total revenues for the three months ended June 30, 2012 and 2011, respectively. Direct sales to Gulfstream accounted for 16.3% and 16.8% of the Company's total revenues for the six months ended June 30, 2012 and 2011, respectively. Accounts receivable balances related to Gulfstream were 8.4% and 5.4% of the Company's total accounts receivable balance at June 30, 2012 and December 31, 2011, respectively.

Direct sales, through both of its business segments, to the Company's third largest customer, Spirit Aerosystems ("Spirit"), accounted for 12.6% and 14.0% of the Company's total revenues for the three months ended June 30, 2012 and 2011, respectively. Direct sales to Spirit accounted for 12.5% and 14.8% of the Company's total revenues for the six months ended June 30, 2012 and 2011, respectively. Accounts receivable balances related to Spirit were 13.5% and 16.5% of the Company's total accounts receivable balance at June 30, 2012 and December 31, 2011, respectively.

Direct sales, through both of its business segments, to the Company's fourth largest customer, Bombardier Inc. ("Bombardier"), accounted for 11.2% and 6.8% of the Company's total revenues for the three months ended June 30, 2012 and 2011, respectively. Direct sales to Bombardier accounted for 10.6% and 5.3% of the Company's total revenues for the six months ended June 30, 2012 and 2011, respectively. Accounts receivable balances related to Bombardier were 10.4% and 9.3% of the Company's total accounts receivable balance at June 30, 2012 and December 31, 2011, respectively.