Subtask 30-21-51-860-050
B. Aircraft Maintenance Configuration
R R (1) Make sure that the ground service network is energized (Ref. TASK 24-42-00-861-001).
R (2) On the center pedestal, on the ENG panel 115VU, make sure that a warning notice is in position to tell persons not to start the engine.
R (3) 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).
Subtask 30-21-51-010-052
C. Make sure that the fan cowl doors are open (Ref. TASK 71-13-00-010-040): FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
4. Procedure_________
(Ref. Fig. 401/TASK 30-21-51-991-300)
Subtask 30-21-51-210-052
A. Before installation, visually inspect the seals (20), and if necessary, replace them (Ref. TASK 30-21-51-210-040)
Subtask 30-21-51-420-051
B. Installation of the Engine Air Intake Anti-ice Valve
(1) Remove the protective covers from the electrical connectors on the harness and the anti-ice valve.
(2) Remove the protective covers from the muscle pressure hose and the union on the anti-ice valve.
(3) Remove the blanking plugs from the air intake cowl anti-ice supply duct, the forward duct and the anti-ice valve (15).
(4) Connect the anti-ice valve (15) to the forward duct and the air intake cowl anti-ice supply duct. Use the couplings (10) and serviceable E-seals (5). Tighten the coupling sufficiently to hold the anti-ice valve in position.
NOTE : Make sure that the flow arrow on the valve points to the air
____ intake cowl anti-ice duct and that the index mark is aligned with the forward duct.
(5) Do a check of the coupling. (Ref. Fig. 402/TASK 30-21-51-991-301)
CAUTION : WHEN YOU CLOSE THE COUPLING, MAKE SURE THE SADDLE WASHER IS
_______ IN CORRECT POSITION. THE SADDLE WASHER IN THE END OF THE SLIDE MUST BE BETWEEN THE NUT AND THE COUPLING BODY. IF THE COUPLING IS NOT CLOSED CORRECTLY IT WILL FAIL.
CAUTION : MAKE SURE THE SMOOTH CIRCULAR SURFACE OF THE COUPLING IS
_______ RADIALLY OUTBOARD FROM THE ENGINE. DO NOT LET THE COUPLING TOUCH ENGINE COMPONENTS OR STRUCTURE. DAMAGE TO THE COMPONENTS OR STRUCTURE COULD OCCUR.
(a)
Try to move the slide.
(b)
If the slide moves, open the coupling.
(c)
Close the coupling with the saddle washer in the correct position between the nut and the coupling.
(6)
TORQUE the nuts on the couplings (10), as follows:
(a)
TORQUE the coupling nut to between 70 and 85 lbf.in (0.79 and
0.96 m.daN).
(b)
Lightly hit the perimeter of the coupling in several places. Use a fiber hammer not made of metal.
(c)
Do steps (a) and (b) above two more times. Then do step (a) again.
(7)
Connect the hose (20) to the valve (15).
(8)
TORQUE the hose coupling to between 135 and 150 lbf.in (1.52 and 1.69 m.daN).
NOTE : Use a second wrench to hold the union on the anti-ice valve
____
when you torque the hose (20) coupling nuts.
1EFF : ALL 1 30-21-51Page 408 1 1 Aug 01/05R 1 1 1CES 1
Duct Coupling Installation Figure 402/TASK 30-21-51-991-301
1EFF : 1 1R 1CES ALL 1 11 1 30-21-51 Page 409 Aug 01/05
(9) Connect the electrical connector 4000DN-A to the anti-ice valve (15). Tighten the electrical connector with your hand.
Subtask 30-21-51-480-050
C. Preparation for the Leak Test (Ref. Fig. 403/TASK 30-21-51-991-302)
(1) Two procedures are possible to find the location of a pneumatic-joint air leak.
NOTE : Apply dry developer only on the connections of the removed____ pneumatic components. Do not apply dry developer on all the pneumatic components.
You can apply dry developer (Material No. CP3010) around the pneumatic joints or you can apply BONDING AND ADHESIVE COMPOUNDS (Material No. 08-061) around the pneumatic joint locations.
(2) Do the steps that follow to apply BONDING AND ADHESIVE COMPOUNDS (Material No. 08-061) to the pneumatic joint locations:
(a) Wind the foil wrap around the joint one time.
(b) Twist the seam of the foil wrap tight as shown.
(c) Make the foil wrap as tight as possible on the tube but do not cause damage to the wrap.
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