_______ MATERIALS ONLY WITH A GOOD SUPPLY OF AIR. OBEY THE MANUFACTURERS INSTRUCTIONS. PUT ON PROTECTIVE CLOTHING. DO NOT GET THEM IN YOUR MOUTH. DO NOT SMOKE. DO NOT BREATHE THE GAS. THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.
 (1)
 Clean the component interface and/or the adjacent area.

 (2)
 Do an inspection of the component interface and/or the adjacent area.

 (3)
 Remove the sealing compound from the flange of the replacement IPPU.

 (4)
 Clean the anodic contact areas on the IPPU and the gearbox.

 (5)
 Coat the areas with a mixture of SPECIAL MATERIALS (Material No. 05-002) and SPECIAL MATERIALS (Material No. 05-054) in the ratio of 58 to 42 by weight.

 (6)
 Apply SPECIAL MATERIALS (Material No. 05-002) to the threads of the screws (1).

 Subtask 27-55-11-420-050
 B. Installation of the Instrumentation Position Pick-Off Unit
 (1)
 Make sure that all zero marks on the IPPU are aligned.

 (2)
 Remove the blanking caps and the tie-wrap (3).

 (3)
 Install the IPPU carefully on the gearbox.

 (4)
 Install the screws (1) and the washers (2).

 (5)
 TORQUE the screws (1) to between 0.87 and 0.96 m.daN (76.99 and 84.95 lbf.in).

R R R  (6) Do a bonding test between the main bonding point of the power control unit and the IPPU flange. The resistance must not be more than 20 milliohms. 
R  (7) Remove the blanking caps from the electrical connectors. 
R  (8) Make sure that the electrical connectors are clean and in the correct condition. 
R  (9) Connect the electrical connectors 3CN-A and 3CN-B to the IPPU.
 Subtask 27-55-11-865-052
 C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 6CV, 8CV, 1CN, 2CN
 Subtask 27-55-11-710-050
 D. Operational Tests
 (1) Do the operational test of the flap system (Ref. TASK 27-54-00-710-001).
 (2) Do the operational test of the overspeed warnings in the slats/flaps and landing gear extended (VFE/VLE) configuration (Ref. TASK 34-13-00-710-007).
 5. Close-up________
 Subtask 27-55-11-410-050
 A. Close Access
 (1) Remove the access platform(s).
 (2) Make sure that the work area is clean and clear of tool(s) and other items.
 (3) Close the main doors of the main gear (Ref. TASK 32-12-00-410-001).

 SPOILER - DESCRIPTION AND OPERATION___________________________________ 
R  1. General_______ 
R  Five spoilers numbered 1 thru 5 inboard to outboard are provided on the rear 
R  upper surface of each wing. 
R  The spoilers are used for: 
R  - Roll function 
R  - Speedbrake function 
R  - Ground spoilers function 
R 
R  Each spoiler is electrically controled (Ref 27-90) and Hydraulically 
R  actuated by an electrohydraulic servocontrol (Ref 27-64). 
R  They are two type of servocontrol with different overhaull (Ref 27-64): 
R  - The inboard type for spoilers 1,2 and 3. 
R  - The outboard type for spoilers 4 and 5. 
R 
R  Three Spoiler Elevator Computer (SEC) (Ref 27-94) elaborate the surface 
R  deflection order. 
R  The spoilers 1 and 2 are associated with SEC 3. 
R  The spoilers 3 and 4 are associated with SEC 1. 
R  The spoiler 5 is associated with SEC 2. 
R  Each SEC is organized around two channel: 
R  - Command channel 
R  - Monitor channel 
R  The Command channel receives analog sensor data,Arinc data and discrete 
R  signals in order to generate the flight commands used to drive the 
R  correspondant servo control. 
R  The Monitor channel receives independently the sensor information required 
R  to compute the control law. 
R  Each SEC is also connected to two Flight Concentrator Data Computer (FCDC) 
R  (Ref 27-95). 
R  The FCDC serves as an interface between the SEC's and; Display System and 
R  Warning (EIS Ref 31-60,FWC Ref 31-53),Maintenance System (CFDS Ref 31-30), 
R  Recording System (FDIU,DFDR,QAR Ref 31-33). 
R  The position of all spoilers and other surface are indicated on the lower 
　
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