The FAA has proposed two civil penalties totaling $633,000 against Trans States Airlines. The carrier is alleged to have operated two Embraer ERJ145 regional jets on 3,660 passenger flights while the aircraft were out of compliance with FARs.

In the first case, the agency believes Trans States improperly installed replacement radio altimeter antenna cables on two airplanes and then operated them on 268 revenue passenger flights. Inspectors found new cables lying unsecured to the airframe inside each aircraft’s aft wing-to-fuselage fairing, as well as old, apparently defective cables still mounted to the walls where the new cables should have been secured.

The FAA also claims Trans States improperly installed electrical wiring in the fuel supply system of an aircraft and then operated it on 3,392 passenger flights. It believes the electrical wires were spliced too close to the fuel tank. The FAA discovered the alleged violations during inspections in 2009, after Trans States returned the leased aircraft to its owner.