(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.
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Subtask 30-21-49-040-054
C. Make sure that the thrust reverser is unserviceable (Ref. TASK 78-30-00-481-041).
Subtask 30-21-49-865-056
D. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------122VU ANTI ICE/ENG/2 1DN2 W10 122VU ANTI ICE/ENG/1 1DN1 X10
4. Procedure
_________
(Ref. Fig. 402/TASK 30-21-49-991-301) Subtask 30-21-49-210-051
A. Examine the seal (55) to make sure that it is serviceable. Subtask 30-21-49-420-050
B. Installation of the Forward Anti-ice Duct
(1)
Remove the blanking plugs from the anti-ice ducts, and the anti-ice valve.
(2)
Remove the protective covers from the hoses and the two ends of the forward muscle pressure tube.
NOTE : Do not torque the bolts that attach the anti-ice duct or the
____ couplings that connect the duct until the duct is installed in the correct position.
(3)
Connect the forward anti-ice duct (65) to the anti-ice valve (4000DN), use the coupling (60) and a E-seal (55) or E-seal (55). Tighten the coupling sufficiently to hold the anti-ice duct in position.
(4)
Attach the support links (80) to the forward anti-ice duct (65) support brackets. Use the bolts (70), washers (75), and nuts (85). Do not torque the nuts at this time.
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(5)
Make sure that the index marks on the forward duct (65) and the anti-ice valve are aligned. Adjust the support links (80), as necessary, so they do not put a load on the anti-ice ducts. Make sure the anti-ice ducts are correctly aligned before the coupling (60) nuts are torqued.
(6)
TORQUE the support link nuts (85) to between 100 and 140 lbf.in (1.13 and 1.58 m.daN).
(7)
TORQUE the coupling nut (60) 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 a metal hammer.
(c)
Do steps (a) and (b) above two more times. Then do step (1) again.
(8)
Install the forward muscle pressure tube (20).
(a)
Loosely install the tube (20) on the forward anti-ice duct (65) support bracket with the bulkhead nut (10) and the washer (15).
(b)
TORQUE the bulkhead nut (10) on the tube (65) to between 110 and 120 lbf.in (1.24 and 1.35 m.daN).
NOTE : Hold the muscle tube (20) fitting with a second wrench
____
when you torque the bulkhead nut (10).
(c)
Put the two clamps (45) on the tube (20). Attach the clamps to the anti-ice duct (65) tangs with the bolts (25), the washers (30), and the nuts (35).
(d)
TORQUE the nuts (35) to between 20 and 25 lbf.in (0.22 and 0.28 m.daN).
(e)
Connect the two hoses (5) and (40) to the tube (20).
(f)
TORQUE the hose (5) and (40) coupling nuts to between 135 and 150 lbf.in (1.52 and 1.69 m.daN).
NOTE : Use a second wrench to hold the fittings on the forward
____ muscle pressure tube when you torque the hose coupling nuts.
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5. Close-up
________ Subtask 30-21-49-410-054
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Close the thrust reverser cowl doors (Ref. TASK 78-36-00-410-040): FOR 1000EM1 452AR 451AL FOR 1000EM2 462AR 461AL
Subtask 30-21-49-440-052
B. Make the thrust reverser serviceable (Ref. TASK 78-30-00-081-041). Subtask 30-21-49-410-058
C. Close Access
(1)
Close the fan cowl doors (Ref. TASK 71-13-00-410-040):
FOR 1000EM1
438AR 437AL
FOR 1000EM2
448AR 447AL
(2)
Remove the access platform(s).
(3) Remove the warning notice(s). Subtask 30-21-49-865-057
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