Lees Avionics has been awarded a contract by Babcock to upgrade 93 Royal Air Force (RAF) Grob 115E training aircraft, also known as the Tutor Fleet.

The upgrade includes installation of Avidyne TAS600 traffic advisory systems and a Sandel Electronic HSI, for improved situational awareness and collision avoidance.

The upgrade programme to improve the safety of the aircraft was launched after two mid-air collisions in 2009.

The Grob 115E allows pilots to fly the aircraft from the right-hand seat with a right-hand stick and a left-hand throttle for easy transition to fast-jet aircraft.

The training aircraft is used for elementary flying training by the 14 university air squadrons and 12 air experience flights throughout the UK.

Work on the contract is expected to be completed by mid December 2011 with about 30 aircraft delivered to date.