For U.S. Boeing 747-400 operators, going outside the country for heavy airframe maintenance may be the only choice, as North American MRO capacity for the huge aircraft becomes increasingly limited. It's easy to see why, given what has become a relatively small number of aircraft.

For Mexico's airline maintenance, repair and overhaul (MRO) industry, this is a time of change, especially given recent developments at Aeromexico and Mexicana MRO Services, the two heavyweights in airframe third-party maintenance in the country. Aeromexico runs a joint venture with Delta TechOps, and Mexicana MRO Services is operating despite the August 2010 bankruptcy and service suspension of Mexicana Airlines, which once accounted for 60% of its business.

Med Atlantica, which recently purchased Mexicana de Aviacion, has signaled its intent to retain Mexicana MRO Services.