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-------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
E. Abrasion
F. Gouge, nick and scratch
2. Examine the related hardware of the ramp fairing for :
A. Damage No carbon fiber damage permitted
0.008 in. (0.20 mm) maximum depth over 8 in.
(203.2 mm) length
No damage permitted Seal surface damage withaerodynamic tape (Material No. CP2517) (paint and surface resin only). Replace tape if peeled
If there is carbon fiber damage, replace the ramp fairing (Ref. TASK 78-32-42-000-001) and (Ref. TASK 78-32-42-400-001)
Monitor at "A" check
If the defect is more than permitted, replace the ramp fairing (Ref. TASK 78-32-42-000-001) and (Ref. TASK 78-32-42-400-001)
If you find some damage, replace the defective part (Ref. TASK 78-32-42-000-001) and (Ref. TASK 78-32-42-400-001)
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5. Close-up
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Subtask 78-32-42-410-050
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 without making thrust reverser serviceable (Ref. TASK 78-36-00-410-040): FOR 1000EM1 451AL, 452AR. FOR 1000EM2 461AL, 462AR.
Subtask 78-32-42-080-051
B. Remove the safety sleeve (HIX 3005) from the blocker door actuator (Ref. TASK 78-32-41-080-001).
Subtask 78-32-42-860-051
C. Move the Blocker Doors
CAUTION : BLOCKER DOOR LATCH MUST BE OPENED WHEN YOU CLOSE THE BLOCKER
_______
DOOR OR DAMAGE CAN OCCUR.
(1) Manually move the blocker doors to the closed position.
Subtask 78-32-42-440-050
D. Make the thrust reverser serviceable (Ref. TASK 78-30-00-081-041).
Subtask 78-32-42-410-051
E. Close Access
(1) Close the fan cowl doors (Ref. TASK 71-13-00-410-040):
FOR 1000EM1
437AL, 438AR.
FOR 1000EM2
447AL, 448AR.
(2) Remove the access platform(s).
(3) Remove the warning notice(s).
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THRUST REVERSER SYSTEM COMPONENTS - DESCRIPTION AND OPERATION
_____________________________________________________________
R 1. Description___________
R (Ref. Fig. 001)
R The thrust reverser actuation system includes:
R - two double switches for the deploy position
R - four door position switches for the stow and locked position
R - four door latches (primary lock)
R - four actuators with inner latch (secondary lock)
R - hydraulic control unit (HCU) including:
R a pressurizing valve
R a directional valve
R a flow limiter
R a bleed valve
R a pressure switch
R a filter and clogging indicator
R a check valve restrictor
R a mechanical inhibition
R - hydraulic hoses
R - electrical harnesses and junction box
R - a SOV and associated filter
2. Component Description
_____________________
(Ref. Fig. 002, 003, 004)
A. Deployed Doors Switch
(1) General The deployed position of the doors is sensed by two thrust reverser double switches : one for the two right side doors and one for the two left side doors. They are located between the corresponding doors in 3 and 9 o'clock beams. One single switch includes 2 cells one for each ECU channel. Junction wires inside the switch are bedded in grease to avoid friction wear problems. A screw enables lever position rigging. The cells are hermetically sealed and include a compensatory system enabling their use in over-pressure (up to 2 bars). The switches are connected to the ECU via the electrical junction box. For each door, one cell is connected to ECU channel A, the other one to channel B. All doors are electrically connected in series. Each time a door reaches 95% of its travel, the circuit closes. Electrical characteristics :
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