and aural information available to them regarding the elevation "above ground level" (AGL) of the aircraft. The report further recommended that: Passengers should be banned from all demonstration flights Flight crews should be provided with – and ensure – proper reconnaissance of airfields Airline company procedures should be reviewed to ensure they comply with official regulations concerning altitude Prosecutions In 1996, Captain Asseline, First Officer Mazières, two Air France officials and the president of the flying club sponsoring the air show were all charged with involuntary manslaughter. In 1997, all five were found guilty. Asseline was initially sentenced to six months in prison along with twelve months of probation. Mazières was given a twelve month suspended sentence. The others were sentenced to probation. Asseline walked free from the court and said he would appeal to France's highest court, the Court of Cassation (). According to French law, Asseline was required to submit himself to the prison system before his case could be taken up by the Court of Cassation. In 1998, Asseline's appeal was rejected and his sentence was increased to ten months of imprisonment along with ten months of probation. Alternative explanation The television documentary series Mayday also reports claims in Season 9 Episode 3 that the plane's flight recorder might have been tampered with and indicated that four seconds had been cut from the tape; this was shown by playing back a control tower tape and comparing it to the remaining tape. Asseline argues that he attempted to apply thrust earlier than indicated in the flight recorder data. When he increased throttle to level off at 100 ft, the engines did not respond. Asseline claims that this indicated a problem with the aeroplane's fly-by-wire system rather than pilot error. After a few seconds, Asseline claims, he became worried that the plane's completely computerised throttle control had malfunctioned and responded by pulling the throttle all the way back then forward again. By that time the aircraft had touched the trees. Mayday also looks at the theory that it was the computer at fault, not the pilots. Because the aircraft's altitude had fallen below 100 ft, the plane's computer may have been programmed to believe it was landing and therefore prevent any drastic manoeuvres from either pilot. When the crew suddenly asked the plane for more power and lift, it may have simply ignored them. It was also claimed by