(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a warning notice is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the access platform is in position.
(4) On the overhead panel 20VU, make sure that the ENG1(2) FIRE pushbutton switch is released.
Subtask 75-23-10-010-058
B. Get Access
(1) Make sure that the fan cowl doors are open: (Ref. TASK 71-13-00-010-040) FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
(2) Make sure that the thrust reverser doors are open: (Ref. TASK 78-36-00-010-040) FOR 1000EM1 451AL, 452AR FOR 1000EM2 461AL, 462AR
Subtask 75-23-10-040-053
C. Make sure that the thrust reverser is unserviceable (Ref. TASK 78-30-00-481-041).
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4. Procedure
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(Ref. Fig. 401/TASK 75-23-10-991-300, 402/TASK 75-23-10-991-301)
Subtask 75-23-10-420-053
A. Install the rotor active clearance start bleed (RACSB) valve as follows:
(1) Clean the component interface and/or the adjacent area.
(2) Do a visual inspection of the component interface and/or the adjacent area.
(3) Remove the blanking plug from the fuel drain port of the RACSB valve (60).
R (4) Lubricate a new O-ring (160) with vaseline (Material No. CP5070).
(5) Install the new O-ring (160) on the nipple (170).
(6) Lubricate the threads of the nipple (170) with graphite grease (Material No. CP2101).
(7) Install the nipple (170) into the drain port of the RACSB valve (60) with your hand.
(8) TORQUE the nipple (170) to between 135 and 150 lbf.in (1.52 and 1.69 m.daN).
(9) Remove the protective closures from the fuel inlet pad of the RACSB valve (60) and from the outlet pad of the fuel manifold (390).
(10) Remove the protective closures from the 5th stage and 9th stage air inlet and outlet ports of the RACSB valve (60).
(11) Position the RACSB valve (60) on the bracket (410) on the core engine.
(12) Lubricate the threads of the bolts (440, 470) with graphite grease (Material No. CP2101).
(13) Install the bolt (440) in the upper aft bolt hole of the bracket
(410) to attach the RACSB valve (60) to the bracket (410) on the core engine.
(14) Install the three bolts (470) that attach the RACSB valve (60) to the bracket (410) on the core engine.
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(15) TORQUE the bolts (440, 470) that attach the RACSB valve (60) to the bracket (410) on the core engine to between 55 and 70 lbf.in (0.62 and 0.79 m.daN).
(16) Position the new metal gasket (430) between the fuel manifold (390) and the fuel inlet pad of the RACSB valve (60) and position the spacer (510) on the fuel manifold (390).
(17) Lubricate the threads of the bolts (420) with graphite grease (Material No. CP2101).
(18) Install and tighten the bolts (420) with your hand to assemble the fuel manifold (390) to the fuel inlet pad of the RACSB (60).
(19) TORQUE the bolts (420) to between 55 and 70 lbf.in (0.62 and 0.79 m.daN).
(20) If removed, install the bolts (370, 490) and nuts (360, 400) that attach the fuel manifold tubes and loop clamps (350, 380) to the brackets on the core engine.
(21) Position the new metal gasket (240) and new orifice plate (250) between the 5th stage outlet port of the RACSB valve (60) and the RACSB discharge tube (110). Install the gaskets (240) on each side of the orifice plate (250).
(22) Position the bracket assembly (300) on the RACSB valve (60).
(23) Lubricate the threads of the bolts (220, 230) with graphite grease (Material No. CP2101).
(24) Install the two bolts (220) in the two aft bolt holes of the 5th stage outlet port of the RACSB valve (60) with your hand to assemble the RACSB discharge tube (110) to the RACSB valve (60).
(25) Install the two bolts (230) in the two forward bolt holes of the 5th stage outlet port of the RACSB valve (60) with your hand.
(26) TORQUE the bolts (220, 230) to between 55 and 70 lbf.in (0.62 and
0.79 m.daN).
(27) Position the new metal gasket (200) between the 9th stage outlet port of the RACSB (60) and the lower air start tube (100).
(28) Lubricate the threads of the bolts (210) with graphite grease (Material No. CP2101). 中國航空網 m.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320飛機維護手冊 AMM AIR 空氣(23)
