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3. Job Set-up
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Subtask 75-22-10-941-051
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a warning notice to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a warning notice to tell persons not to energize the FADEC
1(2). R
R Subtask 75-22-10-861-051
R B. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
R Subtask 75-22-10-865-055
R C. Open, safety and tag this(these) circuit breaker(s):
R -------------------------------------------------------------------------------R PANEL DESIGNATION IDENT. LOCATION R -------------------------------------------------------------------------------R 49VU FUEL/LP VALVE/MOT1/ENG2 2QG A09 R 49VU FUEL/LP VALVE/MOT1/ENG1 1QG A08
Subtask 75-22-10-010-053
R D. Get Access
(1) Open the fan cowl doors (Ref. TASK 71-13-00-010-040): FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
(2) Put the access platform in position.
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Subtask 75-22-10-040-052
R E. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041).
Subtask 75-22-10-010-054
R F. Open the thrust reverser doors (Ref. TASK 78-36-00-010-040): FOR 1000EM1 451AL, 452AR FOR 1000EM2 461AL, 462AR
4. Procedure
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(Ref. Fig. 401/TASK 75-22-10-991-300, 402/TASK 75-22-10-991-301)
Subtask 75-22-10-020-051
A. Removal of the LPTACC Valve
(1) Disconnect the 2 electrical connectors (10) from LPTACC valve (90).
R NOTE : Use soft nose connector pliers only if necessary.
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(2) Put blanking caps on the electrical connectors (10) and on the LPTACC valve electrical receptacles.
(3) Put a container below the LPTACC valve (90) to collect a possible fuel drainage.
(4) Loosen drain tube (80) coupling nut from LPTACC valve (90) drain nipple.
(5) Remove the four bolts (30) which attach the fuel manifold plate (20) to LPTACC valve (90). Remove and retain the gasket (40).
R (6) Remove the clamp (60) which attaches the Low Pressure Turbine (LPT) R cooling air tube (50) to LPTACC valve (90).
(7) Remove the two bolts (120) which attach the air scoop (100) to the forward bracket (110).
(8) Remove the two bolts (140) which attach the outboard bracket assy
(150) and the LPTACC valve (90) assembly to the inboard bracket (130). Then, carefully move down and remove the LPTACC valve (90) together with bracket (150) and air scoop (100).
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LPTACC Valve
Figure 401/TASK 75-22-10-991-300- 12 (SHEET 1)
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