AAR is acquiring inventory and customer contracts from Sabena Technics Brussels. Responsibilities include power-by-the-hour support for 13 customers, which AARâs Aviation Supply Chain division will handle from its new facility at Brussels Airport. âThe move establishes a rotable pool operation covering the A330, A320 and 737NG for current and future customers,â said John Holmes, group vice president of supply chain for AAR. The 24/7 facility will support AOG and other parts requirements for AAR customers in Europe, the Middle East and Africa.