ST Engineering's aerospace arm announced it secured new maintenance contracts worth a total of $453m in the third quarter of 2011. Ranging from three to 18 months, these contracts for the Aircraft Maintenance & Modification, Component Total Support and Engine Total Support businesses will be carried out at its facilities and affiliates in the Americas, Asia Pacific and Europe. The Aircraft Maintenance & Modification business group sealed new airframe contracts, which include base maintenance, heavy maintenance, passenger-to-freighter (PTF) conversion and interior refurbishment on various commercial and military aircraft platforms. The Component Total Support business group was awarded new component contracts, which include Maintenance-By-the-Hour (MBHTM), avionics and mechanical component maintenance, aerostructures and landing gear repair and overhaul. The Engine Total Support business group clinched new engine maintenance contracts, which will be carried out at ST Aerospace's Singapore engine facility on a time-and-material basis. Work scope covers on-wing maintenance, off-wing maintenance, technical management and asset management on various engines types, including CFM56, Pratt & Whitney JT8D, F100, F110, Rolls-Royce Allison T56, General Electric J85, F404, Honeywell T53, T55, and Turbomeca Makila. Between July and September 2011, ST Aerospace redelivered 113 aircraft to various customers, for airframe related maintenance and modification work. Specifically on PTF conversions, it redelivered a total of four converted freighters in 3Q2011. Additionally, it completed a European Aviation Safety Agency-approved Supplemental Type Certificate project for cabin reconfiguration of Ural Airlines' Airbus A320. Besides airframe redeliveries, ST Aerospace serviced 70 engines and 13,775 components for both commercial and military customers during the third quarter of 2011.