( CNN ) -- A Nevada man accused of viewing pornography and fondling himself aboard a Southwest flight was arrested , federal authorities announced Monday . Daniel Drinan , 63 , was taken into custody Saturday night at Denver International Airport on charges of committing lewd , indecent or obscene acts in public aboard an aircraft , the U.S. Justice Department said Monday in a news release . Drinan appeared Monday in a Denver court , where he was advised of his rights and appointed an attorney , said Justice Department spokesman Jeffrey Dorschner . Federal prosecutors did not ask that Drinan be detained and the judge let him walk free on personal recognizance -- and on the condition that he not fly , including to future court appearances -- said Dorschner . The arrest followed a Saturday night flight between Baltimore-Washington International Airport in Maryland and Denver . An affidavit filed in conjunction with the criminal complaint states that Drinan sat down , hooked up his laptop computer to the airline 's Wi-Fi Internet service and began viewing pornography . A person seated nearby noticed a man fondling himself and ultimately alerted a flight attendant , the Justice Department said , citing the affidavit . A male flight attendant arrived and , after finding the suspect 's genitalia exposed , told him to `` put his pants back together , '' according to the federal department . Drinan allegedly tried to use his laptop at times to hide his activity , investigators said . He is scheduled to be arraigned on September 19 , according to Dorschner . Drinan 's location could not be confirmed Monday night , nor could it be determined which attorney was representing him . The Federal Bureau of Investigation and the Denver Police Department are investigating the case , with Assistant U.S. Attorney James Allison in charge of the prosecution , according to the Justice Department . If convicted , Drinan could be sentenced to as many as 90 days in jail and be compelled to pay a $ 250 fine .
Daniel Drinan , 63 , was arrested Saturday after his Southwest flight landed in Denver . He allegedly viewed pornography and fondled himself on the plane , authorities say . A judge released him on his own recognizance , though he ca n't fly , a spokesman says .