maiden flight on 25 April 2007. A total of seven limited series production (LSP) aircraft were built. The LSPs were extensively used for developmental trials such as weapon testing – involving test firing of the R-73 and Python-5 close combat missiles, the I-Derby ER beyond visual range air-to-air missile and guided–unguided munition releases. The LSPs were also used for sensor trials involving integration and testing of the Israeli Elta EL/M-2032 multi-mode radar, Indian Uttam AESA Radar and Rafael Litening targeting pod. The Uttam radar was integrated on the Tejas LSP-2 and LSP-3, and logged about 30 hours of flight testing on the Tejas alone. The high altitude trials and hot weather trials were carried out with the LSPs and the PV-3 prototype, in IOC and FOC configurations. These trials were mainly focused on assessing the performance of the various sensors and avionics on board, at temperatures ranging from below -10 degree Celsius to more than +45 degrees Celsius. Sea trials to assess the radar performance in air-to-air and air-to-sea modes, at various altitudes were carried out in 2010. Flutter vibration tests were also carried out in different configurations at high angles of attack (AoA) to assess the structural integrity across the flight envelope. LSP-4 completed the successful trial of BDL developed Counter Measure Dispensing System (CMDS) with R-73 missile on 2 December 2010. It worked well Open Architecture Mission Computer and Digital Stores Management System. In the second half of 2012, the Tejas fleet was grounded for over three months and the ejection system had to be modified to resume flight tests by the end of 2012. In 2013, Tejas (LSP-7) conducted an inflight engine relight test at high altitude to assess the engine response on flameout, a critical parameter for operational clearance. The inflight engine relight test is crucial for single engine combat aircraft. Operational clearance In December 2006, the IAF announced that it would form an "LCA Induction Team" to manage the aircraft's service introduction. The Tejas was awarded initial operational clearance-I (IOC-I) in January 2011. To ease up the process of FOC, an interim IOC-II was issued to Tejas in December 2013. The IOC-II expanded the g-limit, angle of attack and allowed the aircraft to carry precision guided munitions and close combat missiles. The IOC-II Tejas have an operational radius of 400–500 km. The first squadron, consisting of Tejas in IOC-II configuration, became operational in 2016. The