Air/Ground system 空地系统
**** Hidden Message ***** <P>Air/Ground system<BR>These are the systems/components controlled by the<BR>proximity switch electronics unit (PSEU):<BR> * Landing gear transfer valve (SECTION 32-31)<BR> * Landing gear position indicating and warning<BR>(SECTION 32-61)<BR> * Speedbrake deployed indication (SECTION 27-62)<BR> * Takeoff warning (SECTION 31-53)<BR> * Airstairs control/warning (SECTION 52-71)<BR> * Door warning (SECTION 52-71)<BR> * Air/ground relays.</P><P><BR> Purpose<BR> The air/ground system supplies air mode and ground mode<BR> signals to airplane systems.<BR> Components<BR> * Nose landing gear compressed sensors<BR> * Left main landing gear compressed sensors<BR> * Right main landing gear compressed sensors<BR>Two compressed sensors are on each landing gear. One<BR>sensor sends inputs to air/ground system 1 and the other<BR>sensor sends inputs to air/ground system 2.<BR> * Proximity switch electronics unit (PSEU)<BR> * Air/ground relays<BR> * PSEU fault light.<BR>There are 2 air/ground systems！！！<BR> 接近电门电子组件<BR>(PSEU)<BR>目的<BR>接近电门电子组件控制六个飞机系统并为多个飞机系统提供空/地继电器信号和离散信号输出。PSEU还提供的故障指示并维护<BR>BITE。<BR>位置<BR>PSEU位于前设备舱内。维护人员可通过飞机起落架轮舱前底部的接近门来接近PSEU。<BR>具体介绍<BR>PSEU是一个具有两个内部电路板和前部BITE面板的航线可换件（LRU）。BITE面板下的两盏红灯显示空/地系统是否处于空中模<BR>式。PSEU前面的标牌上标有操纵BITE的程序。<BR>PSEU有七个电气接头：<BR>— 系统1为J1—J4<BR>— 系统2为J5—J7<BR>功能介绍<BR>PSEU为空/地系统执行下列功能：<BR>— 监控起落架压缩传感器<BR>— 操纵空/地继电器<BR>— 发送空/地离散信号<BR>PSEU处理来自空/地传感器的信号，并向飞机系统和空/地继电器发送空/地信号。<BR>PSEU还执行下列功能：<BR>— 起落架位置指示和警告<BR>— 起落架转换活门控制<BR>— 起落架未放下警告<BR>— 速度刹车伸出琥珀色灯控制<BR>— 起飞（音响警告）<BR>— 舱门警告<BR>为得到关于起落架位置指示和警告的详细信息，可参阅起落架位置指示和警告系统部分。（AMM 第I 部分32—61）<BR>为得到关于起落架转换活门的详细信息，可参阅起落架控制系统部分。（AMM 第I 部分32—31）<BR>为得到关于速度刹车伸出琥珀色灯的详细信息，可参阅速度刹车控制系统部分。（AMM 第I 部分27—62）<BR>为得到关于舱门警告的详细信息，可参阅舱门警告系统部分。（AMM 第I 部分52—71）</P>
<P>Main Landing Gear<BR>Compressed Sensors<BR> Physical Description<BR> The landing gear compressed sensors are inductance type<BR>sensors. Each sensor has a metal target and a sensor.<BR> Location<BR> The main landing gear compressed sensors are on the lower area<BR>of the outer cylinder of the main landing gear. The targets are on<BR>each side of the upper torsion link where the link attaches to the<BR>outer cylinder of the main landing gear.<BR>Main Landing Gear<BR>Compressed Sensors<BR> The targets are near the sensors when the main<BR>landing gear shock strut compresses and the airplane<BR>is on the ground. This sends signals to the air/ground<BR>systems in the proximity switch electronic unit<BR>(PSEU). The PSEU detects the change in sensor<BR>inductance and considers the sensor status as target<BR>near. If the target is outside the sensing range, the<BR>status of the sensor is set to target far.<BR> If the PSEU detects a failed sensor, the sensor status<BR>is set to target far.</P>
<P>Nose Landing Gear<BR>Compressed Sensors<BR> Location<BR> The nose landing gear compressed sensors are on each side<BR>of the upper torsion link where the link attaches to the outer<BR>cylinder of the nose landing gear. The targets are on the<BR>lower area of the outer cylinder of the nose landing gear.</P>
<P>Air/Ground Relays<BR> Purpose<BR> The air/ground relays supply air/ground<BR>signals to airplane systems.<BR> Physical Description<BR> The air/ground relays are hermetically<BR>sealed units, with a mounting bracket<BR>attached.<BR>Air/Ground Relays<BR> Location<BR>Air/Ground Relays<BR> Location</P>
<P>Proximity Switch Electronics<BR>Unit<BR> Purpose<BR> The proximity switch electronics unit (PSEU)<BR>controls six airplane systems and provides<BR>air/ground relay and discretre outputs for multiple<BR>airplane systems. The PSEU also provides fault<BR>indication and maintenance BITE.<BR> Location<BR> The PSEU is in the forward equipment<BR>compartment. You get access to the PSEU through<BR>the access door on the bottom on the airplane,<BR>forward of the nose landing gear wheel well.<BR>Proximity Switch Electronics<BR>Unit<BR>Proximity Switch Electronics<BR>Unit<BR> Physical Description<BR> The PSEU is an LRU with two internal circuit cards<BR>and a BITE panel on the front. Two red lights<BR>below the BITE panel show if the air/ground<BR>systems are in the air mode. A placard on the<BR>front of the PSEU has instructions to operate the<BR>BITE.<BR> The PSEU has these seven electrical connectors:<BR>* J1-J4 are for system 1<BR>* J5-J7 are for system 2.<BR>Proximity Switch Electronics<BR>Unit<BR> Functional Description<BR> Monitors the landing gear compressed sensors<BR> Operates the air/ground relays<BR> Sends air/ground discrete signals.<BR>The PSEU also does these functions:<BR> * Landing gear position indication and warning<BR> * Landing gear transfer valve control<BR> * Landing gear not down warning<BR> * SPEEDBRAKES EXTENDED amber light control<BR> * Takeoff (aural) warning<BR> * Airstair control/warning<BR> * Door warning.<BR>Air/Ground Discretes - System<BR>1<BR> These are the multiple use systems/units that<BR>use air/ground discretes from system 1:<BR> * Antiskid/autobrake control unit (AACU)<BR> * Auto speedbrake control module<BR> * Flap/slat electronics unit (FSEU)<BR> * Stall management yaw damper (SMYD)<BR> * AC indication<BR> * Cabin pressurization system<BR> * Ram air door control<BR> * Anti-ice<BR>Air/Ground Discretes - System<BR>1<BR> These are the multiple use systems/units that use<BR>air/ground discretes from system 1 (continue):<BR> * Pitot heat<BR> * Bus power control unit (BPCU)<BR> * Generator control unit (GCU)<BR> * Auxiliary power unit (APU) start<BR> * Auxiliary power unit (APU) warning<BR> * Thrust reversers system<BR> * Common display system (CDS)<BR> * VHF communications system<BR> * HF communications system<BR>Air/Ground Discretes - System<BR>1<BR> These are the multiple use systems/units that use<BR>air/ground discretes from system 1 (continue):<BR> * Aircraft communications addressing and reporting system<BR> * Voice recorder system<BR> * Flight data recording system<BR> * Passenger entertainment video system<BR> * Air data inertial reference system (ADIRU)<BR> * Integrated flight system accessory unit (IFSAU)<BR> * Radio altimeter system<BR> * Weather radar system<BR>Air/Ground Discretes - System<BR>1<BR> These are the multiple use systems/units that use<BR>air/ground discretes from system 1 (continue):<BR> * Instrument landing system (ILS)<BR> * VHF omnidirectional ranging (VOR) system<BR> * Marker beacon system<BR> * Distance measuring equipment (DME) system<BR> * Automatic direction finder (ADF) system<BR> * Air traffic control (ATC) system<BR> * Traffic collision avoidance system (TCAS)<BR> * Ground proximity warning system (GPWS)<BR> * Flight management computer system (FMCS)<BR> * Digital flight control system (DFCS)<BR> * Autothrottle system</P>
<P>Air/Ground Discretes - System<BR>2<BR> These are the multiple use systems/units that<BR>use air/ground discretes from system 2:<BR> * Antiskid/autobrake control unit (AACU)<BR> * Stall management yaw damper (SMYD)<BR> * Cabin pressurization system<BR> * Ram air door control<BR> * Bus power control unit (BPCU)<BR> * Generator control unit (GCU)<BR> * Auxiliary power unit (APU) start<BR> * Auxiliary power unit (APU) warning<BR> * Common display system (CDS)<BR>Air/Ground Discretes - System<BR>2<BR> These are the multiple use systems/units that use<BR>air/ground discretes from system 2 (continue):<BR> * Aircraft communications addressing and reporting system<BR>(ACARS)<BR> * Flight data recording system<BR> * Air data inertial reference system (ADIRU)<BR> * Integrated flight system accessory unit (IFSAU)<BR> * Voice recorder system<BR> * Radio altimeter system<BR> * Instrument landing system (ILS)<BR> * VHF omnidirectional ranging (VOR) system<BR>Air/Ground Discretes - System<BR>2<BR> These are the multiple use systems/units that<BR>use air/ground discretes from system 2<BR>(continue):<BR> * Distance measuring equipment (DME) system<BR> * Automatic direction finder (ADF) system<BR> * Air traffic control (ATC) system<BR> * Flight management computer system (FMCS)<BR> * Digital flight control system (DFCS)<BR>Air/Ground Discretes - System<BR>2<BR>Air/Ground Relays - System 1<BR> System 1 relays receive configuration signals from the PSEU and<BR>electrical power from either BUS 1 or the BAT BUS. The PSEU<BR>also provides the electrical ground source to energize the relays<BR>in an air or ground mode.<BR> These are the air mode relays:<BR> * R584 for the left thrust reverser<BR> * R593 for the control display unit (CDU)/mode control display unit<BR>(MCDU) data loader interface, and door area heaters.<BR> These are the ground mode relays:<BR> * R587 for the power transfer unit (PTU)<BR> * R589 for the weather radar system<BR> * R592 for the overboard exhaust valve control<BR> * R594 for the forward and aft drain mast heaters, and the cargo<BR>compartment fire extinguishers.</P>
<P>Air/Ground Relays - System 2<BR> System 2 relays receive configuration signals from the PSEU and<BR>electrical power from either BUS 2 or the BAT BUS. The PSEU<BR>also provides the electrical ground source to energize the relays<BR>in an air or ground mode.<BR> These are the air mode relays:<BR> * R585 for the right thrust reverser<BR> * R588 for standby rudder control, the gray water drain valve, and<BR>automatic ground speedbrake control.<BR> These are the ground mode relays:<BR> * R590 for the exterior logo lights<BR> * R591 for the automatic ground speedbrake control<BR> * R595 for the pitot and probe heaters, the left and right pack<BR>valves, and power transfer unit (PTU)<BR> * R596 for the nose wheel steering actuator.</P>
<P>Functional Description - Pseu<BR>Fault Light Logic</P> Air/Ground system 空地系统
页:
[1]