【正文】 t pressure bulkhead and is discharged either from the flight deck or P28 panel.APU探測器只感應火警信號。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.發(fā)動機失火和過熱信號探測由安裝在發(fā)動機周圍的探測元件提供。發(fā)動機和APU過熱和失火指示出現(xiàn)在P8或P7板上。壓力控制系統(tǒng)包括一個外流閥、前外流閥、壓力控制器、控制面板、壓力傳感器和監(jiān)視器。：環(huán)境壓力： 30000FT壓力差；坐艙壓力：+=參照圖表描述環(huán)境壓力高度曲線，客艙 高度將是5150英尺（圖43）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。飛機內部高度（坐艙高度）也以一個低于飛機的速率爬升。飛機以接近海平面的機場高度開始飛行、爬升、巡航、下降和接近海平面的機場著陸。二、TEXT1. the air conditioning packs supply conditioned air into pressurization system. the pressurization system controls cabin altitude by regulating air flow from the fuselage, through the outflow valve. The pressurization system maintains cabin altitude as close to sea level as possible or at an altitude equal to the altitude of the flight destination, so the pressurization system provides a safe fortable cabin altitude for the crew and passenger at all airplane altitude.空調組件為增壓系統(tǒng)提供調節(jié)空氣。LESSON 4 PRESSURIZATION INTRODUCTION增壓系統(tǒng)簡介一、單詞組件Pack控制Control\座艙高度Cabin altitude外流閥Outflow valve保持Maintain盡可能的…As as possible目的地destination安全的Safe舒適的Comfortable曲線Curve對時間的Against time起飛Takeoff巡航Curise虛線Dotted line實線Solid line爬升Ascend下降Descent近Near環(huán)境ambient減小decrease變化率rate確定、決定Determine大氣Atmosphere例子Example磅/英寸Psi=pound per square inch參照…By referring圖表Chart描繪Depict與…的關系曲線versus稱之為…Is referred to as 制度Sytstem水銀mercury毫巴Millibar相等的identical施加exert排出exhaust向機艙外outbroud另外，從左混合艙出來的配平空氣管道增加熱空氣給駕駛艙管道。氣流通過渦輪冷卻器驅動渦輪，渦輪驅動壓氣機部分。3. Air from the pneumatic manifold is too warm and must be cooled. The pupose of 2 packs is to reduce engine bleed air temperature to the desired temperature.從增壓主管道中來的空氣太熱，需要降溫。4. On the top of figure 21, the isolation valve separates the left and right halves of the system. On the left side of the isolation valve, the APU bleed air duct joins the left side crossover duct。增壓系統(tǒng)為空調、增壓系統(tǒng)、機翼及整流罩熱防冰系統(tǒng)提供高溫、高壓引氣。8. The 737400, relative to the 737300, has body stretch of 120 inches, tow additional overwing exit, tail skid, and strengthened landing gear.737400與737300相比較，機身伸長了120英寸，多了兩個逃生出口，尾部滑軌及加強了起落架。Section 48 contains the auxiliary power unit(APU) and horizontal stabilizer truss. Access to this section is through a door on the left side. Aft of which is the APU access door and APU exhaust.48部分包括輔助動力裝置和水平安定面桁架。Section 43 contains the passenger cabin and the forward cargo partment.43部分包括客艙和前貨艙。它擁有半硬殼式機身和全收式起落架。專業(yè)資料航空工程英語ESSENTIAL（基礎） ENGLISH OF AERONAUTICAL ENGINEERING航 空 工 程 英 語 基 礎二、TEXT1. the B737 is a low wing airplane. B737 has semimonocoque fuselage and fully retractable landing gear. Two power plants are located under the wings on short struts.波音737是一種下單翼飛機。這部分有兩個下檢修口。這部分終止于后壓力隔板。7. The 737300 is the same basic design as the 737200, with a body stretch of 104 inches, a wing tip extension of 14 inches, a horizontal tail extention of 36 inches, a larger dorsal fin and strengthened stabilizer.737300與737200具有相同的基本設計，機體伸長了104英寸，翼尖延伸了14英寸，水平尾翼延伸了36英寸，還多了個大的脊鰭和增強的水平尾翼。LESSON 2 THE PNEUMATICS SYSYTEM 增壓系統(tǒng)一、生詞目的Purpose壓縮空氣pressure Air 壓縮空氣pneumatic環(huán)境Environment階段，相位Phase得到Obtain發(fā)動機引氣Engine bleed外部的External車Cart接頭Connector整流罩Cowl熱的Thermal防冰Antiicing也，此外Also提供provide飲用水Potable water液壓的Hydraulic啟動器Starter在…之內Within正常的Normal取代Substitute滿足Meet需要，要求Need上部、頂部Top圖形Figure絕緣Isolation活門Valve管道Duct結合、連接Join交叉、跨接crossover管理、調整govern適當?shù)腶ppropriate2. The pneumatic system controls the temperature and the pressure of engine bleed air source. The pneumatic system provides high temperature, high pressure air for the air conditioning .pressurization, wing and cowl thermal antiicing .also, the pneumatic system provides pressure for the potable water system, hydraulic system and engine starters. The engine bleed air systems are located on the engine and within the support strut.增壓引氣控制發(fā)動機引氣的溫度和壓力。3. The normal cabin air source is obtained from the 5thstage of the engines at low –engine power, 9thstage air automatically substitutes to meet user system needs.正常情況下，客艙空氣來自于發(fā)動機低能量的第5級，9級空氣自動分配以滿足用戶系統(tǒng)的需要。用戶系統(tǒng)可以從這些管道獲得壓縮空氣，通過適當?shù)目刂苹铋T進行控制。空氣流進組件中通過組件活門調節(jié)。它包括一個渦輪和一個壓氣機，安裝在共同的軸上。5. In figure 31, we can see that the conditioned air from the right pack flows into the main distribution manifold, the conditioned air from the left pack flows into the main distribution manifold and into the flight partment. In addition, a trim air line from the left mix chamber adds hot air to the flight partment duct. The main distribution manifold supplies the passenger partment overhead distribution system through tow sidewall risers. 在圖31中，我們可以看出，調節(jié)空氣從右組件流向主分配管道，還有調節(jié)空氣從左組件流向主分配管道和進入駕駛艙。飛機高度顯示為虛線，坐艙高度顯示為實線。當飛機爬升時，環(huán)境壓力減小，高度越高，壓力越低。例如：圖43。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.壓力控制系統(tǒng)通過控制機外氣流來提供客艙壓力差。當后外流閥被關閉時，前