 Japan Airlines Co Ltd OTC: JAPSY said Monday it has retired all of its Boeing Cos NYSE: BA 777 jets powered by Pratt Whitney PW4000 engines, a year earlier than scheduled after suspending operations in February. What Happened: Two back-to-back engine failure incidents, first in December involving a Japan Airlines jet and then another one involving a United Airlines NYSE: UAL flight in February, resulted in the global grounding of the 777s powered by the PW4000 series. 