 In 1975, Tawab was promoted to Air Vice Marshal and appointed as Chief of Air Staff of Bangladesh Air Force.After Sheikh Mujib's assassination in August 1975, Tawab was immediately recalled from West Germany to active duty by Major Shariful Haque Dalim upon then Wing Commander M. Hamidullah Khan's advice.Air Vice Marshal A. K. Khandker was promptly dismissed, and Tawab was reinstated to Bangladesh Air Force and appointed the Chief of Air Staff with the rank of Air Vice Marshal.