Tests upon the Chinooks performed by the MOD at Boscombe Down in 1994 reported the FADEC software to be "unverifiable and ... therefore unsuitable for its purpose". In June 1994, the MoD test pilots at Boscombe Down had refused to fly the Chinook HC.2 until the engines, engine control systems and FADEC software had undergone revision. In October 2001, "Computer Weekly" reported that three fellows of the Royal Aeronautical Society had said that issues with either control or FADEC systems could have led to the crash.