Chinese MRO firm Ameco Beijing is in discussions with the Civil Aviation Administration of China "regarding safety issues".
A source close to developments tell FlightGlobal that the company had received a notice from the CAAC and adds that discussions related to Chinese certifications are ongoing.
He adds that Ameco is still carrying out their Part 145 maintenance work.
Ameco was allegedly involved in safety violations over aircraft operating by its parent, Air China.
The company, which is targeting to expand its own capabilities, has been focusing on its integration with Air China Technics over the last two years.
Ameco's capabilities range from line maintenance on various aircraft types, as well as composite component repairs and passenger-to-freighter (P2F) conversion on the Boeing 757.
Ameco, which also has a facility at Chengdu, is 75% owned by Air China. The remainder is held by Lufthansa.
Source: Cirium Dashboard