Richard Poulton
Analyst · Sidoti & Company
Okay. Thanks, David, and good morning, everyone. As is customary, I'd like to provide a little more detail on our performance, including some comments around interest, depreciation and capital expenditures as well.
So within our aftermarket aviation services businesses, our top line sales performance was quite strong. Our supply chain management businesses saw 16% year-over-year growth, and we exclude the 2 aircraft sales last year that we discussed in our release. This was driven by strong program volumes, including programs managed through Airinmar, as well as strong growth in our distribution agreements.
Additionally, our repair and engineering services businesses also saw double digit year-over-year growth as we continue to win market share. Our airframe overhaul centers, in particular, remained very busy. And this is the third quarter in a row that each of the centers has reported higher year-over-year sales. It's on the back of this consistently strong demand that we feel very good about opening a new facility in Duluth that David mentioned.
And finally, as it relates to our aviation services businesses, while our airlift and defense logistics businesses reported flat year-over-year sales, sales were up double-digit percentages on a sequential basis from Q4, as our flight hour volumes and aircraft demand remained strong. And we delivered significantly improved aircraft availability to accommodate that demand.
Within our manufacturing and systems design businesses, our top line sales performance was also quite strong as it was up 79% on a year-over-year basis. Although a large portion of this increase is attributable to the acquisitions of Telair and Nordisk, organic growth was also strong at 9% on a year-over-year basis.
If I move down to margins, consolidated gross profit margins of 16.4% were up 80 basis points year-over-year. And they also compared very favorably to consolidated margins in Q2, Q3 and Q4 of fiscal year 2012. The large driver of this improvement is the inclusion of Telair in our results, as well as the more efficient utilization of facilities and workforce in our airframe and overhaul businesses compared to last year.
I'd also add that while it does not result in a significant year-over-year impact in Q1, we're very happy to see our margins in our Airlift business recover fully from their depressed levels of Q3 and Q4 last year.
Our net interest expense for the quarter was $10.2 million, which is up from $7.4 million last year. The cash portion of this interest expense increased to $7.3 million from $4.2 million last year as a result of the increase in the borrowings we have to pay for our acquisitions. The noncash portion of interest expense was $2.9 million in Q1. And at the end of the quarter, we had approximately $806 million face value of outstanding debt obligations.
As David mentioned, during the quarter we generated a very strong $33 million in cash flow from operations, and we had CapEx of $11 million. We're very pleased to deliver free cash flow conversion in excess of 100% of net income for the quarter, and free cash flow generation will continue to be a primary focus for the company throughout the year.
Our depreciation and amortization, including amortization of stock-based compensation, was approximately $23 million during the quarter. And this resulted in EBITDA, or earnings before interest, taxes, depreciation and amortization, in excess of $61 million for the quarter. This is up approximately 20% on a year-over-year basis.
Finally, I'd like to brief you on a change in our financial reporting, which we expect to implement beginning in our second quarter. As you know, we currently describe our company and report segment financial information along 4 segments. Increasingly, we are going to market as a much more integrated company, blurring the lines of our different entities and different segments, and it's becoming very common for us to sell a customer suite of services in the same program that may cross over several of our different business units.
We see this as a competitive advantage for us in both of the breadth of the services we offer as well as the operating synergies we can create through having our multiple aviation services businesses work together. And so this new market reality change also reflects how we are evaluating results of the company and how we're thinking about the company. Beginning in the second quarter, we expect to report our aviation services businesses in one segment and our manufacturing and systems design businesses in a second segment. Before we report our second quarter results, we'll provide restated results for relevant prior periods, so that all of you can adjust your models appropriately.
So with that, I'd like to turn the call back to David, who will provide some closing comments.