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A SMOKE DETECTOR CONTROL UNIT - SDCU FOR AIRBUS A340 ALSO COMMON TO AIRBUS A330 CIVIL AIRCRAFT. THE SDCU HAS THE FOLLOWING FUNCTIONS - TO MONITOR AND PROCESS THE SIGNALS OF THE SMOKE DETECTORS FOR THE AVIONICS SMOKE DETECTION SYSTEM, LDCC SMOKE-DETECTION SYSTEM, LAVATORY SMOKE-DETECTION SYSTEM. TO MONITOR THE FIRE EXTINGUISHING SYSTEM. TO SUPPLY THE DETECTORS WITH A CONTROLLED VOLTAGE THROUGH A TWO WIRE SAFETY BUS SYSTEM. IT IS PROTECTED AGAINST ONE SHORT CIRCUIT OR ONE OPEN CIRCUIT BETWEEN TWO SMOKE DETECTORS ON EACH BUS LOOP, WITHOUT THE LOSS OF THE DETECTOR FUNCTION. THIS UNIT HAS NO SOUND OR VISUAL SIGNAL, THE UNIT JUST PASSES THE ELECTRICAL SIGNAL TO OTHER APPARATUS WITHIN THE SYSTEM TO PROVIDE THE WARNING. THE SYSTEM DOES NOT CONTAIN ANY RADIOACTIVE SUBSTANCE.

RAM AIR TURBINE (RAT) STOW PANEL FOR USE ON A CIVIL AIRCRAFT. THE PANEL IS USED TO RETRACT THE RAM AIR TURBINE INTO ITS HOUSING. THE PANEL HAS A MANUALLY OPERATED ARM SWITCH WHICH SUPPLIES ELECTRICAL POWER TO THE STOW SELECTOR SWITCH, A 3-WAY CENTRE OFF SWITCH. THE PANEL HAS A HINGED COVER WITH QUICK RELEASE FASTENER. THE COVER CANNOT BE CLOSED WHEN THE GUARD OF THE ARM SWITCH IS IN THE ON POSITION. THE COVER ALSO HAS A TRANSPARENT WINDOW SO THAT THE WARNING LIGHT CAN BE SEEN WHEN THE COVER IS CLOSED. THE ARM SWITCH HAS A GUARD WHICH SETS THE SWITCH TO THE OFF POSITION WHEN IT IS LOWERED.

AUDIO SELECTOR PANEL FOR CIVIL AIRCRAFT, ALLOWS THE FLIGHT CREW TO SELECT THE AUDIO SYSTEM 9(HF, HF ETC) FOR TRANSMISSION AND RECEPTION. AT FRONT, UNIT CONSISTS VARIOUS TYPES OF SWITCHES, PUSH BUTTON, TOGGLE, ROTARY. ON REAR THERE IS A SINGLE SOCKET OF A PLUG-IN TYPE.

VIDEO SWITCHER UNIT, FORMING PART OF AN AIRCRAFT COCKPIT DOOR VIDEO SURVEILLANCE SYSTEM. DESIGNED TO CONTROL IMAGES FROM EXTERNAL AND/OR INTERNAL CAMERAS INSTALLED ON BOARD AN AIRCRAFT.

A PASSENGER CONTROL UNIT, WHICH IS A MULTI-FUNCTION CONTROL UNIT FOR PASSENGER USE IN IN-FLIGHT SYSTEMS IN CIVIL AIRCRAFT. IT CONNECTS TO A SEAT ELECTRONICS BOX (SEB) AND COVERS ONE PASSENGER SEAT GROUP. THE DATA LINES COMMUNICATION IS BY A 1.5 Mb/s LOW SPEED USB SERIAL COMMUNICATION. IT CAN EITHER RECEIVE OR SEND MESSAGES TO/FROM THE SEB. THE SEB SENDS MESSAGES TO THE UNITS HANDSET TO CONTROL ITS AUDIO-VISUAL DEVICES (DISPLAYS, LINDICATOR LIGHTS, ETC). THE UNITS HANDSET SENDS ITS KEY SWITCH OPERATION AND STATUS TO THE SEB.