On December 11 , 1994 , Yousef built another bomb , which had one tenth of the power that his final bombs were planned to have , in the lavatory of an aircraft . He left it inside the life jacket under his seat ( 26 K ) and got off the plane when it arrived in Cebu . Yousef had boarded the flight under the assumed name of Armaldo Forlani , using a false Italian passport . The aircraft was Philippine Airlines Flight 434 on a Manila to Narita route , stopping partway at Cebu . Yousef had set the timer for four hours after he got off the aircraft
Flight 434
Philippine Airlines Flight 434
Bojinka plot