It had four people on board when it disappeared eight days ago.
In a statement on Thursday, the spokesman said that searches are still underway, promising that the public will be informed about the results of the search in due course.
Colonel Azzaim said that the Chadian Air Force helicopter took off from N’Djamena at 10:45 am on March 13.
“The Chadian Air Force and the ground forces, supported by French and American aviation, are conducting searches in the area where the aircraft could be located,” the statement said.