20 AEROSPACE TURBINE ROTABLES, INC. Safety Equipment (continued) AeTR has developed in-house overhaul capabilities for oxygen valves and regulators sent to us for requalification. Our in-house valve overhaul solution enables AeTR to consistently meet and exceed demanding customer expectations consistently. AeTR is constantly developing new capabilities, new test equipment, and new solutions for this product line. OXYGEN VALVES / REGULATORS AeTR can provide overhaul of most mechanical oxygen shut off valves. These valves are overhauled in accordance with approved data and returned to service with FAA/EASA airworthiness forms. OXYGEN SHUT-OFF VALVES