REFER TO AMM - R102

AMM TASK 30-21-51-000-804-A

Removal of the AFT Air-Intake Anti-Ice Valve (PRSOV1)

FIN:4010DN

手冊(cè)原文：

WARNING:

BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

釋義：

警告：

發(fā)動(dòng)機(jī)關(guān)車(chē)后，在發(fā)動(dòng)機(jī)部件開(kāi)展工作時(shí)要小心。使用合適的隔熱手套。發(fā)動(dòng)機(jī)部件在關(guān)車(chē)后可能會(huì)保持高溫一小時(shí)，并可能灼傷您。

1. Reason for the Job

2. Job Set-up Information

3. Job Set-up

分析說(shuō)明：步驟1-3沒(méi)有什么特殊情況，也沒(méi)有難度，按照手冊(cè)執(zhí)行即可。

4.Procedure

手冊(cè)原文：

SUBTASK 30-21-51-020-059-A

CAUTION:

DO NOT LOOSEN OR REMOVE THE BOLTS ATTACHED TO THE FORWARD INNER DUCT (36) AND THE ENGINE CASE WHEN YOU REMOVE/INSTALL PRSOV1. IF YOU DO NOT TIGHTEN/TORQUE THE BOLTS, THIS CAN CAUSE LEAKAGE OF HOT AIR FROM THE FORWARD INNER DUCT DURING THE ENGINE OPERATION.

釋義：

注意：

拆卸/安裝PRSOV1時(shí)，不要松開(kāi)或拆卸連接至前內(nèi)管道（36）和發(fā)動(dòng)機(jī)殼體的螺栓。

如果您不擰緊/磅力矩螺栓，這可能會(huì)導(dǎo)致發(fā)動(dòng)機(jī)運(yùn)行過(guò)程中前內(nèi)管道的熱空氣泄漏。

分析說(shuō)明：

（1）CAUTION要特別關(guān)注，勿動(dòng)的部分勿動(dòng)！

（2）上圖中item36管路是直接連接到發(fā)動(dòng)機(jī)殼體上的一段管路。這個(gè)管路與殼體的連接是通過(guò)4個(gè)螺栓。同時(shí)，為了支撐PRSOV1，這段管路由2個(gè)支架支撐。根據(jù)安裝示意，即使拆除支撐的2個(gè)支架，此管路也不會(huì)有任何方向上的位移。如前后推拉，可能會(huì)對(duì)與機(jī)匣的安裝端造成損傷。如勿動(dòng)了與殼體安裝的4顆螺栓，很可能造成殼體與管接頭間漏氣。

（3）如勿動(dòng)了支架，安裝螺栓的長(zhǎng)度不一樣，確認(rèn)好后再裝回，不然擰不到底。

手冊(cè)原文：

A.Removal of the Aft Air-Intake Anti-Ice Valve (aft anti-ice valve) (1)

NOTE:This valve is also known as Pressure Regulating and Shut-Off Valve 1 (PRSOV1).

【拆除PRSOV1上的附件】

手冊(cè)原文：

(1)Disconnection of the electrical connector (2):

CAUTION:

USE ONLY SOFT-JAW PLIERS. METAL-JAW PLIERS CAN MAKE THE ELECTRICAL CABLE UNSERVICEABLE.

(a)Use PLIERS - JAWED, SOFT to disconnect the electrical connector (2) from the aft anti-ice valve (1).

POST SB LEAP-1A 72-0292

(2)Remove the bolt (6) from the clamp (7).

(3)Remove the electrical harness (4) from the clamp (7).

END POST SB LEAP-1A 72-0292

(4)Remove electrical harness (3) and electrical harness (4) from the spring clips (5).

(5)Remove the coupling (20) between the vent hose (9) and the aft anti-ice valve (1).

(6)Disconnect the vent hose (9) from the aft anti-ice valve (1).

分析說(shuō)明：

（1）本部分的主要目的是：斷開(kāi)item3和4線(xiàn)束的電插頭并移開(kāi)可能受影響施工區(qū)域。

【拆除管路上附件及活門(mén)間管路】

手冊(cè)原文：

(7)Remove the sense tube (12) as follows:

(a)Disconnect the sense tube (12) from the air-sense tube (13).

(b)Use a counter-wrench to hold the aft duct (10) port fitting.

(c)Use a second WRENCH - STANDARD to disconnect the sense tube (12) from the aft duct (10) senseline port fitting and remove the sense tube (12) from the engine.

(8)Remove the tube hose (11) as follows:

(a)Use a counter-wrench to hold the fitting on the aft anti-ice valve (1).

(b)Use a second WRENCH - STANDARD to disconnect the tube hose (11) from the fitting on the aft anti-ice valve (1).

(c)Use a counter-wrench to hold the fitting on the aft duct (10).

(d)Use a second WRENCH - STANDARD to disconnect the tube hose (11) from the fitting on the aft duct (10) and remove the tube hose (11) from the engine.

(9)Remove the muscle tube (21) as follows:

(a)Use a counter-wrench to hold the fitting on the forward anti-ice valve (17).

(b)Use a second WRENCH - STANDARD to disconnect the muscle tube (21) from the forward anti-ice valve (17) fitting.

(c)Use a counter-wrench to hold the fitting on the aft anti-ice valve (1).

(d)Use a second WRENCH - STANDARD to disconnect the muscle tube (21) from the aft anti-ice valve (1) and remove the muscle tube (21) from the engine.

(10)Remove the coupling (15) between the vent hose (9) and the vent tube (22), and remove the vent hose (9) from the engine.

分析說(shuō)明：

（1）本部分的主要目的是：移除4根管路。感壓管item11和12；通氣管item9；壓力管item21。

（2）拆除管路時(shí)，兩個(gè)扳手的使用要特別注意，避免管路受力。

（3）4根管路相互獨(dú)立，并沒(méi)有層次上的關(guān)系，雖手冊(cè)按序號(hào)列出，并沒(méi)有嚴(yán)格的先后順序。

【脫開(kāi)管路上的2個(gè)支架】

手冊(cè)原文：

(11)Remove the nut (14) and bolt (18) from the inboard strut (19) immediately aft of the forward anti-ice valve (17).

(12)Carefully move the free end of the strut (19) away from the aft duct (10).

(13)Remove the nut (33) and bolt (34) from the aft strut (35) immediately aft of the aft anti-ice valve (1).

(14)Carefully move the free end of the strut (35) away from the aft duct (10).

分析說(shuō)明：

（1）本部分的主要內(nèi)容是：脫開(kāi)item10管路2個(gè)支架的管路端，并向遠(yuǎn)離管路方向移開(kāi)。

（2）item10上面共4個(gè)支架連接，其中3個(gè)與發(fā)動(dòng)機(jī)殼體相連，1個(gè)與其他管路相連。

【拆除PRSOV1兩側(cè)的兩個(gè)卡子和管路后部的卡子】

手冊(cè)原文：

(15)Open and remove the V-band clamp (32) at the aft end the aft anti-ice valve (1).

(16)Open and remove the V-band clamp (37) at the forward end of the aft anti-ice valve (1).

(17)Loosen the V-band clamp (28) at the aft end of the forward anti-ice valve (17). If necessary, V-band clamp (28) may be fully opened and removed, but be careful not to lose or damage the E-seal within the V-band clamp (28).

分析說(shuō)明：

（1）本部分的主要目的是：拆除3個(gè)固定卡子，分別為item32/37/28。其中item28要求松動(dòng)，按需移除。特別注意：如移除item28卡子，千萬(wàn)注意封嚴(yán)不要掉落或損壞。

（2）拆除3個(gè)卡子是必須的，由于管路之間沒(méi)有柔性連接。

（3）注意卡子的位置，卡口朝向，方便安裝時(shí)參考。

【取下活門(mén)】

手冊(cè)原文：

(18)Remove the aft anti-ice valve (1) as follows:

(a)Carefully move the aft anti-ice valve (1) in the forward direction while carefully moving the aft duct (10) in the aft direction to disengage the key tab from the key slot.

(b)Turn the valve clockwise (ALF) to remove it from the engine.

(c)If you need more access you can remove the nut (30) and bolt (29) from the vertical strut (27) and the nut (26) and the bolt (24) from the strut (25) immediately aft of the forward anti-ice valve (17).

(d)If you need more access, you can remove bolts (23) which secure spring clip bracket (16) to aft duct (10) flange.

(19)Remove and discard the E-seal (31) from the aft end of the aft anti-ice valve (1).

(20)Remove and discard the E-seal (38) from the duct opening that is forward of the aft anti-ice valve (1) location.

(21)Install COVER - PROTECTION and CAP - PROTECTION on all the open ports, open tubes, open hoses, and connectors.

分析說(shuō)明：

（1）PRSOV1移除的的方法要領(lǐng)要細(xì)細(xì)品味。

（2）如確實(shí)拆除困難，按需移除其他接近項(xiàng)目。

（1）“二四二三”：2根線(xiàn)束（移開(kāi)位置）；4根管路（移除）；2個(gè)支架（脫開(kāi)一端）；3個(gè)卡子（完全打開(kāi)或移除）；

（2）取下活門(mén)時(shí)，一定注意理解手冊(cè)，注意方式方法；

（2）手冊(cè)中勿動(dòng)的部分，一定別動(dòng)；

（3）注意移除、脫開(kāi)、完全打開(kāi)的含義；

（4）item28卡子注意封嚴(yán)別脫落或損傷；