The move follows the final findings submitted by a three-string probe committee, said Shakil Meraz, a general manager of the state-owned carrier, on Wednesday.
The three engineers put on temporary suspension are Chief Engineer (Production) Debesh Chowdhury, Chief Engineer (Quality Assurance) SA Siddik and Principal Engineer (System and Maintenance) Billal Hossain.
Six more top officials were earlier suspended.
A Boeing-777 aircraft carrying the prime minister to Hungary on Nov 27 made emergency landing at Turkmenistan after a drop in fuel pressure was detected in one of the engines.
A member of the Biman investigation committee, speaking on condition of anonymity, told bdnews24.com that a ‘human error’ caused the glitch.
A nut of the tank storing engine oil or lubricant was loose and the 'problem was fixed after tightening it', he said.