3. Job Set-up
__________
Subtask 78-30-00-941-052
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.
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(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).
Subtask 78-30-00-010-051
B. 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.
4. Procedure_________
(Ref. Fig. 401/TASK 78-30-00-991-300, 402/TASK 78-30-00-991-302, 403/TASK 78-30-00-991-303)
Subtask 78-30-00-440-050
A. Reactivation of the thrust reverser
(Ref. Fig. 402/TASK 78-30-00-991-302, 403/TASK 78-30-00-991-303)
(1) Remove the screws (5) that attach the lockout fairings (6) to the storage bracket (4). (Ref. Fig. 402/TASK 78-30-00-991-302)
(2) Remove the bolts (3) that attach the lockplates (2) to the blocker door. (Ref. Fig. 403/TASK 78-30-00-991-303)
(3) Remove the lockout bolts (1) from the blocker doors.
(4) Install lockout bolts (1) in the storage bracket (4).
(Ref. Fig. 402/TASK 78-30-00-991-302)
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(5) Attach the lockplates (2) to the storage bracket (4) with the bolts (3).
(6) TORQUE bolt (3) to between 30 and 40 lbf.in (0.33 and 0.45 m.daN).
(7) Attach the lockout fairings (6) to the blocker doors with the screws (5). (Ref. Fig. 402/TASK 78-30-00-991-302)
(8) TORQUE screw (5) to between 15 and 17 lbf.in (0.16 and 0.19 m.daN).
(9) Make the Thrust Reverser Serviceable
(Ref. Fig. 401/TASK 78-30-00-991-300)
(a) Remove the quick-release pin that holds the inhibit lever on the HCU in the OFF position (see sheet.2).
(b) Move the inhibit lever from the OFF position to the operational position (see sheet.1).
(c) Install the quick-release pin in its operational position.
5. Close-up
________ Subtask 78-30-00-410-051
A. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Remove the access platform(s).
(3) Close the fan cowl doors: (Ref. TASK 71-13-00-410-040)
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
(4) Remove the warning notice(s).
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THRUST REVERSER CONTROL AND INDICATING - DESCRIPTION AND OPERATION
__________________________________________________________________
R 1. General
_______ R (Ref. Fig. 001, 002, 003, 004) R The thrust reverser is controlled from the cockpit by means of the throttle R control lever and is only operative on ground. R A thrust reverser control lever, when actuated, allows the throttle control R lever to be moved rearward in the reverse thrust selection area and the R thrust reverser to be controlled by the Electronic Control Unit (ECU). The R throttle control lever, when actuated in the reverse thrust selection area, R allows the SOV to be opened through the SEC and a static relay. R The ECU incorporates a thrust reverser command logic based on throttle R control lever selection, thrust reverser feedback position and ground/flight R configuration, the calculated Mach number, which generates a command signal R to the pressurizing valve and the directional valve. R The signal from the ECU to the directional valve is fed to an inhibition R relay controlled by the Engine Interface Unit (EIU) according to throttle R control lever position. R Each channel of the ECU can control and monitor the thrust reverser. R The hydraulic power required for the actuator is supplied from the normal R hydraulic system. R During blocker doors transient, the ECU commands the engine to idle.
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