|Agency||Chicago Fire Department|
|Type of Firefighter||Career|
|Age Range||46 to 50|
|Date of Birth||0/0/0|
|Date of Death||6/16/1986|
|Cause of Death||Struck by object|
|Nature of Death||Trauma|
|Attribute of Death||[not applicable]|
|Type of Duty||Firefighting operations|
On June 15, 1986, Lieutenant Robert Liesz of the Chicago Fire Department was fatally injured when he was struck by an air conditioner that fell out of a burning apartment building. Liesz was stationed outside the building when the fire burned through a windowsill on the building's third floor, leaving the air conditioner without any support. Liesz died the following day while undergoing surgery at Weiss Memorial Hospital.
“Mass Planned for Firefighter Killed On Duty,” Chicago Tribune, June 18, 1986.