A structural component is classified as primary structure rather than secondary structure. Which characteristic most accurately defines that classification?, It primarily contributes to aerodynamic smoothness but does not carry significant aircraft loads., It transmits flight, ground or pressure loads into the aircraft structure., It carries only local inertial loads and transfers them into an adjacent primary component., Why are special isolation and corrosion-protection measures required where aluminium components contact carbon-fibre composite structure?, Carbon-fibre composites absorb moisture and transfer it directly into the aluminium structure., Carbon-fibre composites expand more than aluminium and mechanically abrade the contact surface., Direct contact can promote galvanic corrosion, so aluminium components are protected and isolated with finishes, sealant and suitable fastener materials., It preserves fuselage bending capability through the wing and wheel-well region and carries significant compression loads caused by body bending., It provides the principal attachment structure for passenger-floor beams in the upper fuselage., It preserves fuselage bending capability through the wing and wheel-well region and carries significant compression loads caused by body bending., It carries cabin pressurization tension loads circumferentially around the fuselage., Why are lightning-diverter strips installed on the nose radome even though the radome itself is largely fiberglass?, They electrically heat the radome surface so ice cannot accumulate over the radar antenna., They reduce lightning energy reaching the radar antennas and conduct that energy toward the aircraft structure., They provide the principal structural reinforcement needed to withstand bird impact., What structural difference distinguishes the Boeing 737-9 aft pressure bulkhead from the Boeing 737-7 and 737-8 installation?, The Boeing 737-9 uses a rounded bulkhead made from composite material, while the Boeing 737-7 and 737-8 use flat aluminium bulkheads., The Boeing 737-9 eliminates the aft pressure bulkhead and uses the tailcone as the pressure boundary., The Boeing 737-9 uses a flat aft pressure bulkhead, whereas the Boeing 737-7 and 737-8 use a rounded bulkhead., Which statement most accurately describes the structural composition of the vertical stabilizer main torque box?, Its spars, ribs, stringers and skins are made from carbon-fibre reinforced plastic, while auxiliary structure uses aluminium or titanium., It is entirely aluminium, with composite material used only in the rudder skin., Its spars are titanium, its ribs are aluminium and its skins are fiberglass., In the No. 1 flight-compartment window, which pane provides the primary structural capability to withstand cabin pressure?, The outer glass pane., The vinyl interlayer., The inner glass pane., During normal opening of the No. 2 flight-compartment sliding window, why does the mechanism first move the window inboard before allowing it to travel aft?, The inboard movement disconnects electrical window-heating contacts before rearward movement., The inboard movement creates sufficient clearance from the window frame, after which the rollers allow the window to travel aft to the locked-open position., The inboard movement releases cabin pressure through the window seal before the external release handle can operate., Why is the middle pane of a passenger-compartment window considered a fail-safe structural component?, It is structural and is capable of carrying approximately 1.5 times the normal cabin pressure load if necessary., It is non-structural but prevents the outer pane from leaving the aircraft if it fails., It contains the pressure-relief breather hole that prevents any pressure differential across the outer pane., Which wing structural feature correctly describes the load path and system attachment functions of the front and rear spars?, The rear spar carries most wing-to-fuselage load and supports the leading-edge devices, while the front spar supports the trailing-edge flaps and ailerons., The front and rear spars have identical functions and divide all wing loads equally., The front spar carries most wing load into the fuselage and supports the leading-edge flaps and slats, while the rear spar also transmits wing loads and supports the flaps and ailerons.

ATA 51-57

by
Print
Embed

Leaderboard

Visual style

Options

Switch template

Continue editing: ?