BEIJING - China’s civil aviation authority on July 20 ordered an operator linked to a light aircraft which crashed into Beijing’s tallest building in June to suspend operations, ground all aircraft and eliminate “major safety hazards”.

The rare crash in Beijing’s busy central business district during the evening rush hour killed the pilot of the small single-engine, two-seat light sport aircraft.

Another 13 people who were not on board were injured, local government has said.

The pilot had suffered from insomnia and anxiety ​and his diary repeatedly mentioned ending his life, local government said earlier in July.

Questions remain over how the plane penetrated the tightly restricted air space.

Aviation authorities have been “unable to confirm the companies’ flight personnel qualifications and the airworthiness status of the aircraft meet the flight safety requirements for the operating license items applied for, and major safety hazards exist,” said the North China Regional Administration of the Civil Aviation Administration of China (CAAC).

Its notice named Dongshi Shuangyue General Aviation, as well as another company called Dongshi Kunpeng General Aviation. It was not immediately clear if Dongshi Kunpeng, which is also based in Beijing’s outskirts, had any links to the crash.

Reuters could not immediately reach Dongshi Shuangyue or Dongshi Kunpeng for comment outside normal business hours.

The plane involved in June’s crash, which carried registrat...