Aircraft Technical

  Aircraft Cabin Window Vent Hole    Aircraft cabin window provide clear visibility from cabin to outside. It is required to have opening in aircraft structure to accommodate cabin window. Commercial aircraft normally fly at high altitude to get economy benefit but this pose safety issue for passenger due low ambient pressure. Thus, aircraft pressurized for passenger comfort and safety.                                              Fig 01   Aircraft Cabin Window Due difference in ambient and cabin pressure, pressurization load act inside of an aircraft structure.   To take pressurization load effectively structure must be strong and opening in the structure should be as small as possible and stiffened around the opening for structure stability. Aircraft window are smaller in size to ensure minimum pressurization load act on window. Window opening in the structure are oval shape to prevent stress  concentration points. Aircraft window comprises two window panes called main pane and

  Aircraft Fuel Tank Access Door Aircraft carries fuel in the wing fuel tank .There are number of component in the fuel tank to control refuelling/defueling operation,measure fuel quantity and supply fuel to the engine.To carry out maintenance task such as tank cleaning,inspection,repair or modification work on fuel system components access to fuel tank is required.Thus,access door provided on the lower surface of wing which allow entry into tank  for necessary maintenance work.  The design of fuel tank access door compliance with number of requirement some of them are no fuel leak,fire resistance,resistance to a tyre impact, resistance to impact resulting from an uncontained engine rotor failure ( UERF),lightning strike,seal friction and wing bending. Fig 01 Fuel Tank Access Door  (Unload Bearing Panel) Fig 02 Fuel Tank Access Door ( Load Bearing Panel ) How fuel tank access door comply with design requirements let's discuss step by step  Fuel Leak:                              

Aircraft Hydraulic Reservoir Fluid Low Level Switch    Aircraft hydraulic reservoir store hydraulic fluid.The hydraulic fluid level of reservoir measured by fluid quantity transmitter and transmitted signal to system computer to display fluid level in the cockpit.Low level switch on the reservoir generate alert signal when fluid level in the reservoir critically low.                                                                                               Fig 01 Hydraulic Reservoir                          Aircraft hydraulic system supplies pressurized hydraulic fluid to aircraft flight control,landing gear and engine thrust reverser system actuator through metal pipelines.During an aircraft operation there is a possibility of pipelines or actuator may damage cause fluid leakage through pipelines or actuator.If hydraulic pump continue to run in absence of hydraulic fluid ,pump will heat up.This will create  hazardous situation for flight.Thus, alerting reservoir low level sign