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Pressuree diffeential 7.80psid
12.16psi
by referring to the chart depicting ambient pressure versus altitude, if the
ambient pressure is 12.16psi, the cabin altitude would be 5150 ft (see
sigure 4-3).
飞机高度可通过测量环境大气的压力来测得。例如：图4-3，在高于
海平面3 万英尺的环境压力为4.36PSI。客舱高度可通过环境压力加
7.8PSID 来测得，7.8PSID 由增压系统保持：
环境压力：4.36PSI 30000FT
压力差；7.8PSID
坐舱压力：4.36+7.8=12.16PSID
参照图表描述环境压力高度曲线，如果环境压力是12.16PSID，客舱
高度将是5150 英尺（图4-3）
(5) the cabin pressure is referred to as “psid” and indicates the differential
pressure, in pounds per square inch , between inside and outside of the
airplane. There are many systems for measuring pressure and “psi” is only
one .airplane systems measure pressure in inches of mercury and millibars;
these indications are identical to 14.7psi as a measurement of the pressure
exerted by the atmosphere at sea level.
客舱压力被称为“PSID”并用“磅/英尺”指出压力差，在飞机内外，
有许多系统可测量压力，“PSI”只是其中之一。飞机系统用英寸水
银或毫巴来测量压力；这些指示等同于受到海平面大气压力14.7PSI。
(6) The pressure control systems provide cabin differential pressure by
controlling the outflow of air from the faselage. The pressure control
system consists of an aft outflow valve, forward outflow valve, pressure
controller, control panel, pressure sensing inputs, and monitoring
indicators.
压力控制系统通过控制机外气流来提供客舱压力差。压力控制系统包
括一个外流阀、前外流阀、压力控制器、控制面板、压力传感器和监
视器。
(7) The aft outflow valve allowing cabin air to exhaust overboard to maintain
cabin pressure. The forward outflow valve receives a control signal from
the aft outflow valve . when the aft outflow valve is closed, the forward
outflow valve receives a signal to drive full closed.
后外流阀允许客舱空气排出到机外以保持客舱压力。前外流阀接收一
个从后外流阀来的控制信号。当后外流阀被关闭时，前外流阀接收又
个信号驱使完全关闭。
LESSON 5 FIRE DETECTION 火警探测
一、单词
火警探测Fire detection 在…周围Around 组件Pack
监控Monitor 存在Exist 泄漏Leak
部件Component 警告Alarm 报警器horn
过热Overheat 铃声Bell 规定specify
发生Occur 听觉Aural 在…之下beneath
面板Panel 器件device 与…相对应Respond to
机翼Wing 灭火器Extinguish 盆basin
厕所Lavatory 瓶Bottle 擦手纸斜槽Tower chute
可选的optional 角落Corner
特征feature 轮子wheel
可用的Available 放出discharge
位置Location 完成Accomplish
元件element 天花板Ceiling
二、TEXT
(1) the fire detection systems monitor airplane components for overheat, fire
or smoke condition. Engine and APU fire and overheat indication occurs
on the P8 and P7 panels.Wing and body duct overheat warning occurs on
the P5 and P7 panels. Lavatory smoke detection indication is an optional
feature that is available. Indication can occur at the lavatory location and
or on the P5 panel.
火警探测系统监控飞机组件的过热、失火或烟雾等情况。发动机和
APU 过热和失火指示出现在P8 或P7 板上。机翼和机身管道过热警
告出现在P5 或P7 板上。厕所烟雾探测指示是一个可选装配件。指示
能够出现在厕所位置或P5 板上。
(2) Engine fire and overheat detection is provided by detector elements
located around the engine. The engine and APU fire detection accessory
unit M279, located in the E/E bay determines if a fire or overheat
condition exists.When detected indications occur in the flight deck an
alarm bell is provided by the aural warning devices unit M315 for a fire
condition. The two engine fire extinguisher bottles are located on the
upper left aft corner of the main wheel well and are discharged from the
flight deck.
发动机失火和过热信号探测由安装在发动机周围的探测元件提供。发
动机和APU 火警探测组件M279，安装在电子设备舱，用于判断是否有
失火或过热情况发生。当在飞机蒙皮探测到火警信号时，音响警告设
备M315 将给出一个警告铃声。两台发动机灭火瓶安装在主轮舱左下
方后角处，并从□□处释放。
(3) The APU detectors sense fire conditions only. Monitoring of the sensors is
accomplished by the M279. indications occur on the P28 panel in the
wheel well and also in the flight deck. The APU fire bottle is located
behind the aft pressure bulkhead and is discharged either from the flight
deck or P28 panel.
APU 探测器只感应火警信号。传感器的监控由M279 完成。指示出现在
P28 板在主轮舱和FLIGHT DECK。APU 灭火瓶后压力隔板上，并通过
P28 板或FLIGH DECK 释放。
(4)Wheel well fire detection is provided by detector elements mounted on the
wheel well ceiling. The detectors provide input to the M237 module
located in the E/E bay. Indications occur on the P7 and P8 panels and an
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