On 11 October 1999, an Air Botswana ATR 42-320 piloted by Chris Phatswe, an Air Botswana pilot, intentionally crashed the aircraft into a group of aircraft at Sir Seretse Khama International Airport in Gaborone, Botswana. He was the only casualty. His actions effectively crippled operations for Air Botswana.

The aircraft involved, manufactured in 1988, was an ATR 42-320 registered as A2-ABB with serial number 101. It was equipped with two Pratt & Whitney Canada PW121 engines.

On 11 October 1999, Phatswe commandeered an ATR 42-320 from the Air Botswana section of the terminal at Sir Seretse Khama International Airport and took off. For two hours he circled the airport, radioing the control tower and announcing his intention to kill himself. The airport was evacuated as a precaution; passengers later reported a good deal of panic in the terminal. Officials in the tower attempted to convince him to land; efforts were led by General Tebogo Masire, then deputy commander of the Botswana Defence Force. Phatswe threatened to crash it into an Air Botswana building, saying he had a grudge against the airline's management. He demanded to speak to Ian Khama, Botswana's then vice-president, but when officials in the control tower told Phatswe that there were people in the Air Botswana building, he changed his mind. Shortly after being put through to Khama, the ATR-42 began to run out of fuel, so Phatswe carried out a successful landing, but instead of surrendering to airport security, he proceeded to taxi towards the apron at high speed, slamming the stolen plane into two other ATR-42s on the ramp. All three planes were destroyed in a fiery crash, and Phatswe was killed. He was the only casualty.

The three planes were the only operational craft then in the Air Botswana fleet; a fourth plane, a BAe-146, was grounded with technical trouble at the time. Consequently, Phatswe's actions effectively crippled operations for the flag carrier.

Phatswe had repeatedly threatened airport authorities, telling them that he would kill himself, but never gave a reason. At the time of the incident he was on medical leave from the airline, having failed a physical two months previously and been declared unfit to fly; consequently, he was not authorized to take the plane. Airport security was reported to be lax, and it was said to be quite easy for somebody to steal an aircraft.

• 1977 Connellan air disaster - suicide attack by a disgruntled former airline employee using a stolen aircraft
• 2018 Horizon Air Q400 incident - Aircraft theft and suicide crash by a ground employee of Horizon Air
• Accidents and incidents involving the ATR 42 family
• List of accidents and incidents involving airliners by location § Botswana
• List of accidents and incidents involving commercial aircraft

• AirDisaster.com report on the incident (Archive)