An employee of a California-based manufacturing company checked a bag containing undeclared hazardous material onto a passenger-carrying flight at Detroit Metropolitan Airport on Dec. 16, 2014.

The Federal Aviation Administration (FAA) is proposing a $52,500 civil penalty against Gaffoglio Family Metalcrafters, Inc. of Fountain Valley, California, for the alleged violation of the Hazardous Materials Regulations.

The FAA says the bag held six containers of flammable liquid adhesive, one can of flammable aerosol and one can of non-flammable aerosol.

The items were discovered when security officers screened the luggage.

The FAA alleges the package was not properly described in shipping papers, packaged, marked, or labeled under the Hazardous Materials Regulations. The FAA also alleges the company did not provide required hazardous materials training to the employee who prepared the shipment, and did not provide emergency response information with it.

Gaffoglio Family Metalcrafters supplies components to the automotive, transportation, aviation, aerospace and entertainment industries.