u2032 for use with second embodiment 100 of the assembly in drive mechanism 20 a tooth 26 t of respective toothed gears 26 engages holes 19 along the respective sides of panel 18 the gears 26 are bi directionally driven by respective motors 50 to accomplish this each motor 50 is connected to a pulley 54 by a drive shaft 56 to rotate the pulley in the appropriate direction pulley 54 in turn is connected to a pulley 58 by a belt 52 gear 26 and pulley 58 are commonly mounted on a shaft 60 for cowling assembly 100 drive mechanism 20 u2032 has one end of each shaft 60 installed in the opening 134 in vertical flange 132 of the respective tracks 28 a 28 b so to mount the entire assembly in place a sensor 51 installed on each motor provides control information to a controller for the assembly as will be described in fig1 a 11b a third embodiment 20 u2033 of the drive mechanism is also for use with embodiment 100 of the cowling assembly now a motor 50 u2032 drives both toothed gears 26 each gear is mounted to one end of a drive shaft 66 whose other end is connected.