Italian authorities ordered Saturday the seizing of production components BoeingThey claimed that 787 aircrafts did not meet customer’s technical requirements.

Finance police seized the titanium and aluminum components from a plant belonging to an Italian aerospace and defence group. Leonardo in Grottaglie, in southern Italy.

Two small companies, Manufacturing Process Specification and Processi Speciali (MPS), produced the components. They were sub-suppliers of Leonardo. The seizure was ordered by the Brindisi prosecutor.

Processi Speciali’s administrator declined to comment. The MPS court-appointed administrator was unavailable for comment immediately.

Unnamed people are being investigated for fraud as well as actions that could endanger the safety of air transportation.

According to prosecutors, their investigation revealed that parts had been made using aluminum and titanium of different quality than the ones specified by the customer. This was in violation of relevant technical specifications.

According to the prosecutors, the components were made “for the production sections 44 and 46 Boeing 787 fuselages”.

The statement stated that Leonardo, who filed a lawsuit Dec. 7th, is the injured party to both criminal and administrative investigations.

Leonardo did not respond to our request for comment.

Boeing Italy spokesperson declined to comment.

Boeing stated in October that parts for 787 Dreamliners supplied by MPS had been improperly made over three years.

The U.S. manufacturer of aircraft stated that the issue was not affecting the safety of flight operations immediately and had informed the Federal Aviation Administration (FAA).

Boeing announced that undeliverable planes will be modified and existing passenger-carrying planes will undergo an FAA review and will receive FAA approval.

Three people told Reuters, November 3, that prosecutors in Southern Italy were investigating the supply of parts by MPS to Boeing.