Operational Experiences of Turbine-Powered Commercial Transport Airplanes

Recent results obtained from NASA V-G and VGH recorders installed on commercial turbine-powered transports have indicated that exceedances of placard speeds appear to have been significantly reduced since the placard speeds have been redefined and changes made in the aural warning. Oscillatory accelerations and unusual events, such as large or rapid departures from the planned flight profile, occur less frequently. Landing-impact accelerations are higher for turbine transports than for piston transports and vary with operator. The total in-flight acceleration experiences for turbine transports, however, are not significantly different from those for four-engine piston transports.