(a)
 Install one DRIVING ADAPTOR (98D32403003000) on each of two standard drilling machines (rotation speed higher than 900 rpm).

 (b)
 Connect the DRIVING ADAPTOR (98D32403003000) to the tachometer drive shaft on the wheel on which the tachometer has been replaced and on a wheel of the opposite landing gear.

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 Subtask 32-42-00-865-056
 B. Make sure that this(these) circuit breaker(s) is(are) closed:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU L/G/Y BRK/PRESS/IND 61GG C10 121VU HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY 4GG M36 121VU HYDRAULIC/BRAKING AND STEERING/SYS2/CTL 3GG M35 121VU HYDRAULIC/BRAKING AND STEERING/SYS1/CTL 1GG M34 121VU HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY 2GG M33 121VU HYDRAULIC/SOL VALVES/G/Y/PTU 1801GL N34
 4. Procedure
_________
 Subtask 32-42-00-720-050
 A. Test of the Tachometers
 NOTE : In the test that follows, if you use the DRIVING ADAPTOR with the
____ drilling machine, read DRIVING ADAPTOR as an alternative to DRIVING TOOL.
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the captain or the first  On all the brakes: officer side:
 -push the brake pedals.  - the pistons are extended.
 2. On each DRIVING TOOL:  On each wheel which is not connected to the DRIVING TOOL:
 -set a wheel speed of between  - the brake pistons retract.
 900 and 1100 rpm for the
 connected wheels.

 3. On the DRIVING TOOL connected to  On this wheel: the wheel with the replaced tachometer:
 -decrease the speed to zero. - the brake pistons retract.
 4. Release the brake pedals.  On all the brakes:
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 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
-the pistons are retracted.
 NOTE : You must release the brake
____
 pedals before you stop the
 last tachometer

 5. On the DRIVING TOOL connected to the wheel of the opposite landing gear:
 -decrease the speed to zero.
 NOTE : The braking system goes
____
 back to the usual
 operating condition 20
 seconds after the test

 Subtask 32-42-00-740-052
 B. Reset the related Spoiler Elevator Computers
 (1)
 Energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-861-002).

 (2)
 Set the related SEC(s).

 (a)
 For the tachometer(s) 19GG and/or 22GG: - on the overhead panel 23VU, release the FLT CTL SEC 3 pushbutton switch, then push it in

 - on the overhead panel 24VU, release the FLT CTL SEC 2 pushbutton switch, then push it in.

 (b)
 For the tachometer(s) 20GG and/or 21GG:

 - on the overhead panel 23VU, release the FLT CTL SEC 1 pushbutton switch, then push it in.
 (3)
 Do the BITE test of the EFCS computers (Ref. TASK 27-96-00-740-001).

 (4)
 Make sure that the MCDU shows no maintenance message related to the tachometer.

 (5)
 De-energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-862-002).

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 Subtask 32-42-00-860-060
 C. Aircraft Maintenance Configuration
 (1)
 Depressurize the Green hydraulic system (Ref. TASK 29-10-00-864-001).

 (2)
 Do the ADIRS stop procedure (Ref. TASK 34-10-00-860-005).

 (3)
 De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).

 (4)
 Remove the MLG WHEEL TACHYMETER DRIVING TOOL (355M03190000) or the DRIVING ADAPTOR (98D32403003000) with the drilling machines.

 5. Close-up
________ Subtask 32-42-00-942-055
 A. Removal of Equipment
 (1) Make sure that the work area is clean and clear of tool(s) and other items.
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 TASK 32-42-00-720-002-A
　
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