The case had been brought by the National Anti-Corruption Commission (NACC) against two former THAI executives: Thanong Bidaya, former chairman of the board, and Kaweepan Ruangphaka, former deputy managing director of finance and accounting and corporate policy management.
The NACC had previously found both individuals guilty under the Act on Offences Committed by Officials of State Organisations or Agencies.
The commission alleged that Thanong, during his tenure as chairman, abused his authority by interfering with and influencing the work of THAI’s executive management and subcommittees responsible for long-term investment planning.
Specifically, he was accused of exerting undue influence over decisions regarding fleet size adjustments, engine procurement and aircraft spare parts.
According to the court, this influence led to a narrow comparison of only two medium-to-long-range aircraft models—Airbus A340-600 and Boeing B777-200ER—both equipped with Rolls-Royce engines.
This, despite the fact that the airline had previously encountered significant issues with the high maintenance costs and limited repair facilities associated with Rolls-Royce engines.
The actions of both defendants were tied to the procurement of six Boeing B777-200ER aircraft equipped with Rolls-Royce TRENT 892 engines, as well as components for TRENT 500 engines used in seven Airbus A340-500/600 aircraft, the court stated.
However, after reviewing the case, the Central Criminal Court for Corruption and Misconduct Cases ruled that the prosecution's evidence lacked sufficient weight to convict the defendants. The court therefore dismissed the case.