R A. Remove the hubcap or the debris guard (if brake fans are installed) (Ref.
R AMM TASK 32-41-11-000-006).
R (1) Do a visual inspection of the tachometer drive mechanism and make
R sure that:
R - the tachometer drive shaft moves freely.
R - there is no deformation (twisting) and/or sign of friction on the
R drive shaft.
R - the splines of the tachometer drive shaft are in the correct
R condition.
R - the splines of the tachometer hubcap or the splines of the debris
R guard (if brake fans are installed) are in the correct condition.
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R (2) If the tachometer drive is damaged:
R - replace the DRIVE ASSY-TACHOMETER,WHEEL 2 (2680GM) (Ref. AMM TASK
R 32-42-68-000-003) and (Ref. AMM TASK 32-42-68-400-003).
R (3) If the tachometer hubcap or the debris guard (if brake fans are
R installed) is damaged:
R - replace the tachometer hubcap or the debris guard (if brake fans
R are installed) (Ref. AMM TASK 32-41-11-000-006).
R (4) If the tachometer drive mechanism is not damaged:
R - do a functional test of the tachometer (Ref. AMM TASK 32-42-00-720-
R 002) or (Ref. AMM TASK 32-42-00-720-003).
R (a) if the test is OK:
R - Make sure that the splines of the tachometer are coated with
R grease before final assembly (Ref. AMM TASK 32-41-11-400-
R 006).No other maintenance action is necessary.
R (b) if the test confirms the fault:
R - replace the TACHOMETER-WHEEL 2 (21GG) (Ref. AMM TASK 32-42-57-
R 000-001) (Ref. AMM TASK 32-42-57-400-001)
R (5) If the fault continues:
R - do the trouble shooting procedure (Ref. TASK 31-32-00-810-933)
R related to the ANI-6 analog input signal of the SEC 2 COM and SEC 3
R COM (Ref. ASM 27-92/25).
R (6) If the fault continues:
R - do a check and repair the wiring from the tachometer (21GG) pins
R A/A,C to the first terminal block (Ref. ASM 32-42/02).
R B. Do the functional test given in Para. 4.A.(4)
TASK 32-42-00-810-821
Loss of the Signal from the Tachometer (Wheel 3) to the BSCU
1. Possible Causes
_______________
- BSCU (10GG)
- wiring from the BSCU (10GG) pins AB/7K, 7J to the first terminal block
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 32-42-00-720-002 Functional test of the tachometers
AMM 32-42-00-720-003 Functional Test of the tachometers with the AIDS.
AMM 32-42-34-000-001 Removal of the Braking/Steering Control Unit (BSCU)
(10GG) AMM 32-42-34-400-001 Installation of the Braking/Steering Control Unit (BSCU) (10GG) ASM 32-42/02
3. Fault Confirmation
__________________
A. Test Do the functional test of the tachometer (Ref. AMM TASK 32-42-00-720-002) or (Ref. AMM TASK 32-42-00-720-003)
4. Fault Isolation
_______________
A. It the test confirms the fault:
- do a check and repair the wiring from the BSCU (10GG) pins AB/7K, 7J to the first terminal block (Ref. ASM 32-42/02).
(1) If the fault continues:
- replace the BSCU (10GG) (Ref. AMM TASK 32-42-34-000-001) (Ref. AMM TASK 32-42-34-400-001).
B. Do the functional test given in Para. 3.A.
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TASK 32-42-00-810-822
Failure of the Tachometer (Wheel 3)
1. Possible Causes
_______________
- DRIVE ASSY-TACHOMETER,WHEEL 3 (2679GM)
- TACHOMETER-WHEEL 3 (20GG) R - wiring from the tachometer (20GG) pins A/A,C to the first terminal block
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本文链接地址：A320 Trouble Shooting Manual 排故手册 起落架 LANDING GEAR 1(107)
