494 A secondary system is used to estimate the fuel quantity when the aircraft is on the ground

1049、WEAK

1048、VERTICAL STABILIZER

1047、Use gloves when you touch parts with edge serrations.

1046、UNSATISFACTORY

1045、TYPICAL

1044、TRANSPARENT

1043、()TO MOVE THE CONTROL COLUMN.

1042、To change or cause to change from straight to curved.

1041、Through a process called continuing airworthiness,virtually every component comprising an airplane is involved in some form of preservation, inspection, preventative maintenance, overhaul, repair, and/or replacement activity.

1040、Those removable units used for entrance or exit, and for enclosing other structure