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3. Job Set-up
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Subtask 75-31-30-860-052
A. Aircraft Maintenance Configuration
(1) 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.
(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.
Subtask 75-31-30-010-059
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
R 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
R 461AL, 462AR.
Subtask 75-31-30-040-055
C. Make sure that the thrust reverser is unserviceable (Ref. TASK 78-30-00-481-041).
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4. Procedure
_________ (Ref. Fig. 401/TASK 75-31-30-991-300) Subtask 75-31-30-420-052 R A. Installation of the VBV inter-connecting flexible shaft:
(1) Make sure that the VBV doors are in the reference CLOSED position. If not do this:
(a) Set the VBV system sector which includes the master bleed valve
R and ballscrew actuator to the CLOSED position (Ref. TASK 75-31-20-820-001).
(b) Close the other sector of the VBV system (the one without the master bleed valve and ballscrew actuator) (Ref. TASK 75-31-00-820-001).
(2) Install the inter-connecting flexible shaft as follows:
(a) Engage the hexagonal end (spring end) of the flexible shaft in the applicable actuator assembly, through the fan frame strut.
(b) Compress the spring, and engage the opposite end of the flexible shaft in the adjacent actuator assembly.
(c) Make sure that the VBV system is still in the reference CLOSED position. If not, adjust the VBV doors reference CLOSED (Ref. TASK 75-31-00-820-001).
(d) Do a manual operation check of the Variable Bleed Valve doors (Ref. TASK 75-31-00-200-002)
(e) Do an operational test of the FADEC on the ground (with engine motoring) (Ref. TASK 73-29-00-710-040).
(3) Install fan duct panels (Ref. TASK 72-23-00-400-027).
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5. Close-up
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Subtask 75-31-30-410-054
A. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Close thrust reverser cowl doors: (Ref. TASK 78-36-00-410-040) FOR 1000EM1 451AL, 452AR FOR 1000EM2
R 461AL, 462AR.
(3) Remove the access platform(s).
Subtask 75-31-30-440-052
B. Make the thrust reverser serviceable (Ref. TASK 78-30-00-081-041).
Subtask 75-31-30-410-056
C. Close Access
(1) Close fan cowl doors: (Ref. TASK 71-13-00-410-040) FOR 1000EM1 437AL, 438AR FOR 1000EM2
R 447AL, 448AR.
(2) Remove the warning notice(s).
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TASK 75-31-30-000-002 Removal of the VBV System Main Flexible Shaft
1. Reason for the Job
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Self Explanatory
2. Job Set-up Information
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A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
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