washington top members u.s. senate commerce committee urge counterparts house representatives move forward senate legislation boost aviation security authorize program federal aviation administration may 24 letter release wednesday senate panel republican chairman john thune south dakota top democrat bill nelson florida caution house lawmakers congress six weeks leave approve legislation temporary faa fund patch expire mid-july letter address house transportation chairman bill schuster pennsylvania panel top democrat peter defazio oregon urge movement senate bill pass overwhelm bipartisan support last month believe legislation represent model house action essential avoid another round fund extensions disruptive aviation industry delay much-needed reform thune nelson say house lawmakers take senate bill focus instead multi-year measure stall due disagreement controversial plan privatize u.s. air traffic control system aid shuster available comment defazio say agree senators need move forward could pass comprehensive legislation broad bipartisan support today republicans drop divisive scheme privatize air traffic control oregon democrat say statement issue office thune nelson describe senate bill viable opportunity year deliver comprehensive legislation president barack obama signature add house privatization measure would face hurdle senate even house reach agreement understand commitment privatization proposal senate far reach consensus issue senators say senators urge house move aviation security bill