Shahram Askarpour
Analyst · Thompson Davis & Company
Thank you, Rell, good morning, everyone. Let me provide a quick update on the progress achieved during the quarter and, more particularly, the significance of our recent major announcement. The STC for our new PC-12 NextGen cockpit was recently awarded. This is an integral part of our overall autothrottle strategy.
As previously mentioned, we have been lining up initial orders for our autothrottle, with a large customer having installed our equipment and revenue being generated from this product in the second quarter. While the FAA seems satisfied with our autothrottle , because of it being the first non-FADEC turboprop autothrottle as well as the first Part 23 turboprop autothrottle, it requires new rule-making, which was the cause of delay for the autothrottle STC.
Fortunately, FAA issuance of the companion flight [ ASTC ] has us confident the autothrottle STC is not far behind. We also previously mentioned that we intend to market this product not only through our direct sales organization but also through partner MROs. In this context, MROs provide 2 services. First, it provides a cost-effective, efficient distribution network. Second, it provides installation and first line of customer support.
Over the past year, we have emphasized the MRO channel, and now we're beginning to actually see sales being generated. The PC-12 is an aircraft that is frequently individually owned, and many of these owners rely on their local MROs for their routine maintenance and repairs. Consequently, it makes sense to let the MRO channels pursue sales to the individual PC-12 owners and operators while we focus our direct sales organization on opportunities suggested by larger fleet operators. We are in discussion with several of these fleet operators.
Our agreement with Lufthansa Technik takes our MRO strategy to another level. With some 35 subsidiaries and affiliates, the Lufthansa Technik Group is one of the leading providers of technical aircraft services in the world. Lufthansa Technik portfolio covers the entire range of services for commercial and VIP special-mission aircraft. Engines, components and landing gear in the areas of digital fleet support, maintenance, repair, overhaul, modification, completion and conversion. Under our agreement, Lufthansa Technik will distribute and install our aircraft for display and navigation solutions that we have developed and certified over the past few years. Some of our novel navigation solutions, such as LTV navigator and IGNS, have gained significant interest from international operators.
The agreement includes our solution for classic series Boeing 737 and 757/767 at all Lufthansa Technik's locations throughout the world, adding the comprehensive avionics retrofit capability to then complement other existing conversion capabilities. Now when an operator has a 737, 757 or 767 in for conversion or maintenance, they can offer a cockpit upgrade that we believe features the industry's best price for performance. Lufthansa Technik did not previously offer a cockpit upgrade for these aircraft. In partnering with IS&S, they clearly recognize our successful trafficking of air transport cockpit offering, extending the operating life of over 320 Boeing aircraft. Additionally, [indiscernible] STC and the Lufthansa Technik agreement are in line with the strategy to continually expand our product portfolio while penetrating untapped markets for our existing products through new distribution channels.
As Geoff mentioned, along with the autothrottle and our NextGen retrofit cockpit, we believe the utility management system developed for the PC-24 has also growth potential in other OEM platforms. We also experienced continued interest in some of our legacy products that the company was founded on. For example, last week we had a successful test flight of our military solid-state biometric altimeter by the European Consortium and shortly expect additional orders for that product. More recently, we have increased the resources dedicated to developing international markets. More than 37% of the revenue this quarter was from our backlog of international orders. From an operational standpoint, the last 3 months were generally consistent with the past few quarters and majority of the revenues generated in the quarter was from product sales, growth from backlog as well booking share. This revenue generated 50% gross margins, which is in line with our historical performance. Ending backlog was little changed from the beginning backlog as we replaced business work of the new orders, including modest activity on new Pilatus aircraft. Our goal remains to leverage our growing portfolio of products and create a global presence to win new orders and to build a more robust backlog.
Our strategy anticipates the impeding implementation of NextGen mandates and the upgrades this will necessitate throughout the aviation industry. We are optimistic about the prospects of our newly developed products over the next few years. Let me turn the call back to Geoff for some closing remarks.