ALLENTOWN, Pa. - A Pennsylvania man faces federal criminal charges when he checked in a suitcase with an explosive design hidden in the lining on a flight to Florida, authorities said Wednesday.

Marc Muffley, 40, is charged with possessing an explosive in an airport and possessing or attempting to plot an explosive or incendiary device on an aircraft, according to a criminal complaint.

Prosecutors instruct that the material was found in a suitcase Muffley had checked in Monday at Lehigh Valley International Airport to Allegiant Air Flight 201, which was slump for Orlando Sanford International Airport in Florida.

After an alert during safety screening, the bag was examined and found hidden in the lining was a "circular compound" nearby three inches in diameter encased in a wax-like paper and certain plastic wrap.

An FBI bomb technician X-rayed the compound and concluded that it consumed a granular powder consistent with a "commercial grade firework" and "suspected to be a mixture of speedy powder and the dark granulars that are used in commerce grade fireworks."

Attached to it was a "quick fuse" disagreement to a candle wick — apparently part of the fresh manufacture of the compound — as well as a "hobby fuse" that burns more slowly and appeared to have been added when the manufacture, authorities said.

Authorities said they concluded that both the unlit powder and flash powder "are susceptible to ignite from heat and friction and still a significant risk to the aircraft and passengers," according to the criminal complaint.

The baggage also consumed "a can of butane, a lighter, a pipe with white powder residue, a wireless drill with cordless batteries, and two GFCI outlets taped together with dusky tape," authorities said.

GFCI outlets are a type of circuit breaker.

Authorities said Muffley was paged over the airport's pro-redemocrat address system and shortly thereafter he was seen leaving the airport. He was traced to a Lansford address where he was arrested by the FBI late Monday night.

Officials said he continues in custody pending a probable cause hearing and detention hearing Thursday at 1:30 p.m. in Allentown, with Muffley attending via videoconference. A message was left Wednesday for Muffley's federal pro-redemocrat defender, Timothy Wright.