The aircraft have only 10% commonality with the existing first generation aircraft. The new variants also have four times the fatigue life of the original aircraft. 24 aircraft will be delivered. Hawk 127 The Royal Australian Air Force ordered 33 Hawk 127 Lead-in Fighters (LIFs) in June 1997, 12 of which were produced in the UK and 21 in Australia. This variant is also powered by the Adour 871. The Hawk 127 is operated by the RAAF's No. 76 Squadron and No. 79 Squadron which are based at RAAF Base Williamtown and RAAF Base Pearce respectively. Work to upgrade the RAAF's Hawks to a standard similar to the Hawk 128 standard began in 2014, and it is planned that the two squadrons will begin operations with these aircraft in 2017. Hawk AJT The Hawk Advanced Jet Trainer (AJT) differs from previous variants in that it features modern LCDs instead of conventional instrumentation and is powered by the Rolls-Royce Adour 951 engine. In 2012, orders were placed for the AJT version by the Royal Saudi Air Force and the Royal Air Force of Oman. Hawk 128 (Hawk T2) – Version for the RAF and Royal Navy. The Ministry of Defence awarded a Design and Development Contract to BAE Systems on 22 December 2004. The T2 builds on the design of the Australian Mk. 127 and the South African Mk. 120s. Hawk 132 – Export version for the Indian Air Force (IAF) and was previously known as the Mk. 115Y. BAE Systems delivered the final of 24 UK-built Hawks to the IAF in November 2009. HAL handed over the first locally-built Hawk 132 on 14 August 2008. These aircraft are powered by the Rolls-Royce Adour Mk 871 engine. Hawk 165 – Export version for the Royal Saudi Air Force. 22 aircraft were originally built in the UK by BAE with delivery completed in 2017, whilst another 22 aircraft are currently being built locally in Saudi Arabia with the first "locally built" aircraft delivered to the RSAF in June 2019 and a further 7 by October 2019. Hawk 166 – Export version for the Royal Air Force of Oman. 8 aircraft were ordered in 2012 and built in the UK, with the first aircraft delivered in 2017. Hawk 167 (Hawk T2A) – Export version for the Qatar Emiri Air Force (QEAF). 9 aircraft were ordered in 2018, with the first aircraft delivered in