With many of the U.S. majors announcing schedule cutbacks, older aircraft will be retired earlier than originally planned. Tuesday's events have changed most of airlines' plans for their fleets. You will see Delta speed up retirement of the 727 and 737-200 (whch would include DLX's fleet), NWA the DC-10 and 727, AA the 727, United 727 and 737-200, CAL the DC-10 and older MD-80 series aircraft, U.S. Airways the MD-80 family and 737-200 (and perhaps Metrojet as a whole), and Southwest may speed up 737-200 retirement. Since slashing schedules and frequencies leaves aircraft sitting on the ground, not making money, and add to the fact that the aircraft that date from the 1970s are fuel hogs, airlines will retired the old birds because it makes the most financial sense. If any planned government assistance does not come through, the 727 and DC-10 as passenger aircraft in the U.S. will be no more. Foreign carriers will be affected as well, since their loads on routes to the U.S. will fall sharply, so some routes will see equipment changes, and perhaps a change in the number of flights a day to some cities. For example, BA currently flies two flights a day to ATL, one using a 777, the other a 767. Let's say the loads on the 777 flight don't warrant using a 777 on the route, BA may switch to two 767 flights or one 747-400 flight. Foreign carriers will have aircraft sitting on the ground unused, so many may reduce their fleets for the short term and maybe even for the long term.