____ Pressure-off Brakes are removed from the Power Control Unit.
 (1)
 Remove the electrical connectors 28CV-A and 28CV-B from the Feed Back Position Pick-off Unit (FPPU).

 (2)
 Put blanking caps on the disconnected electrical connectors.

 (3)
 Remove the screws (1) and the washers (2).

 (4)
 Remove the FPPU carefully from the gearbox.

 (5)
 Put a tie-wrap (3) behind the locking plate to prevent the retraction of the locking plate.

 Feed Back Position Pick-Off Unit
 Figure 401/TASK 27-81-19-991-001
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 TASK 27-81-19-400-001 Installation of the Feed Back Position Pick-Off Unit WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______
 START A TASK ON OR NEAR:

 -
THE FLIGHT CONTROLS

 -
THE FLIGHT CONTROL SURFACES

 -
THE LANDING GEAR AND THE RELATED DOORS

 -COMPONENTS THAT MOVE.
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific access platform 2.2 m (7 ft. 3 in.) R No specific Torque Wrench : range 0.00 to 1.20 m.daN R (0.00 to 9.00 lbf.ft)
 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 05-002  USA MIL-P-8116 PUTTY, ZINC CHROMATE GENERAL PURPOSE (Ref. 20-31-00) Material No. 05-054 ZINC POWDER(USE WITH 05-002) (Ref. 20-31-00)

 C. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
27-80-00-866-005 Retracting the Slats on the Ground 27-84-00-710-001 Operational Test of the Slat System 32-12-00-010-001 Open the Main Gear Doors for Access 32-12-00-410-001 Close the Main Gear Doors after Access 27-81-19-991-001 Fig. 401
 3. Job Set-up
__________
 Subtask 27-81-19-860-051
 A. Aircraft Maintenance Configuration
 (1)
 Make sure that the main doors of the main gear are open (Ref. TASK 32-12-00-010-001).

 (2)
 Make sure that the access platform is in position at the opening of the main door of the main gear.

 (3)
 Make sure that the slats are in the retracted position (Ref. TASK 27-80-00-866-005) because a new FPPU is delivered locked in its zero position.

 Subtask 27-81-19-865-051
 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1 5CV B06 121VU FLIGHT CONTROLS/SLT/CTL/SYS2 7CV R21

 4. Procedure
_________
 (Ref. Fig. 401/TASK 27-81-19-991-001) Subtask 27-81-19-860-052
 A. Preparation for Installation
 WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL

_______ 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 FPPU.

 (4)
 Clean the anodic contact areas on the FPPU 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) the threads of the screws (1).

 Subtask 27-81-19-420-050
 B. Installation of the Feed Back Position Pick-Off Unit
 (1)
　
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