Revenue during the quarter grew 16.01 percent to $814.02 million from $701.70 million in the previous year period. Gross margin for the quarter expanded 120 basis points over the previous year period to 54.58 percent. Total expenses were 61.06 percent of quarterly revenues, up from 60.66 percent for the same period last year. That has resulted in a contraction of 40 basis points in operating margin to 38.94 percent.

Operating income for the quarter was $317.01 million, compared with $276.04 million in the previous year period.

"We are pleased with our fiscal first quarter operating results. This is a good start to the 2017 fiscal year," stated W. Nicholas Howley, TransDigm Group's chairman and chief executive officer. "Total revenue was in line with our expectations with minor puts and takes within the market channels. Bookings, or incoming orders were particularly strong in the commercial aftermarket, while the much smaller business jet and helicopter markets remained weak. Our reported EBITDA As Defined margin of 47.3% was higher than the prior period in spite of approximately one margin point dilution from the acquisitions completed in fiscal 2016. Our constant focus on our value-based operating strategy continued to show results.

Transdigm Group expects revenue to be in the range of $3,520 million to $3,570 million for financial year 2017. For fiscal year 2017, Transdigm Group projects net income to be $617 million. For fiscal year 2017, Transdigm Group forecasts net income to be in the range of $609 million to $625 million. For fiscal year 2017, the company expects diluted earnings per share to be $9.29. For financial year 2017, the company projects diluted earnings per share to be in the range of $9.15 to $9.43. For fiscal year 2017, the company projects diluted earnings per share to be $12.16 on adjusted basis. For financial year 2017, the company projects diluted earnings per share to be in the range of $12.02 to $12.30 on adjusted basis.