Hindustan Aeronautics Limited (HAL) is accelerating on the HTT-40 programme and has now floated tenders for the proposed aircraft's primary flight display system and the engine instrument crew alert system. As reported earlier by SP's, despite the IAF's overwhelming concerns over the cost of the HTT-40 and recommendation that the project be shelved, Hindustan Aeronautics Ltd (HAL) is staying with the programme, finding it through internal accruals.

Other systems being sought by HAL include LP shutoff cock, fuel booster pump, retraction manifold and pilot vision camera and recording system. Apart from an active competition for its turboprop engine, HAL has called for competitive bids for a number of systems including primary flight display units, integrated standby instrument system, angle of attack system, engine instrument and crew alert system, hydraulic utility packs, hydraulic pumps, total air temperature probe, air data probe, vapour cycle cooling system and emergency accumulator manifold.