BizJet, a member of the Lufthansa Technik Group and based in Tulsa, OK, is a Rolls-Royce factory authorized MRO, catering to the Spey Mk511-8, Tay Mk611-8, and Tay Mk611-8C engines. With over 30 years of corporate jet engine experience, BizJet is an industry leader when it comes to turnaround times, quality, and on-budget performance. BizJet Engine Support Team (BEST) is a team of OEM-trained technicians available to trouble-shoot and resolve AOG engine issues anywhere in the world, 24/7/365. BizJet also offers a world class full-service FBO, providing executive-level customer service, competitive fuel rates, and amenities to accommodate travel needs. For technical support call (918) 832-7733 or (888) 388-4858, BEST (field service): (918) 831-7657, BEST (field service) toll-free: (855) 789-2378, FBO: (918) 510-1386 or email [email protected]. Hours: CST, on call 24/7/365 with call ahead.