4. Fault Isolation
_______________ **ON A/C ALL R Post SB 34-1147 For A/C 001-004,051-060,
 A. If the test gives the maintenance message CFDIU(1TW)/MMR2(40RT2):
 - replace the MMR-2 (40RT2) (Ref. AMM TASK 34-36-31-000-002) and (Ref. AMM TASK 34-36-31-400-002).
 (1) If the fault continues:
 - do a check and repair the wiring of the CFDS DATA INPUT bus between the MMR2 (40RT2) and the first terminal block for pins AB/1E, 1F of the MMR2 (Ref. ASM 34-36/01).
 B. Do the test given in para. 3.

 TASK 34-36-00-810-852
 MMR1 Test cannot be started
 1. Possible Causes
_______________
 - MMR-1 (40RT1)

 - LGCIU-1 (5GA1)

 - FMGC-1 (1CA1)

 - wiring between the MMR1(40RT1) and the LGCIU1(5GA1)

 - wiring between the MMR1(40RT1) and the FMGC1(1CA1)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 22-83-34-000-001 Removal of the FMGC (1CA1,1CA2)
 AMM 22-83-34-400-001 Installation of the FMGC (1CA1,1CA2)
 AMM 32-31-71-000-001 Removal of the LGCIU (5GA1, 5GA2)
 AMM 32-31-71-400-001 Installation of the LGCIU (5GA1, 5GA2)
 AMM 34-36-00-740-003 BITE Test of the MMR
 AMM 34-36-31-000-002 Removal of the Multi Mode Receiver (40RT1, 40RT2)
 AMM 34-36-31-400-002 Installation of the Multi Mode Receiver (40RT1,

 40RT2)
 ASM 34-36/01

 3. Fault Confirmation
__________________
 **ON A/C ALL
R Post SB 34-1147 For A/C 001-004,051-060,
 A. Test Do the BITE test of the MMR1 (Ref. AMM TASK 34-36-00-740-003).

 4. Fault Isolation
_______________
 **ON A/C ALL
R Post SB 34-1147 For A/C 001-004,051-060,
 A. If the test gives the maintenance message
 LGCIU1(5GA1)/FMGC1(1CA1)/ MMR1(40RT1):

 - do a check for a short to ground at pins AB/4AD, 15F of the MMR-1 (Ref. ASM 34-36/01).
 (1) If there is no short to ground:

 - replace the MMR-1 (40RT1) (Ref. AMM TASK 34-36-31-000-002) and (Ref. AMM TASK 34-36-31-400-002).

 (2) If there is a short to ground at pin AB/4A:

 - replace the LGCIU-1 (5GA1) (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001).
 (a) If there is a short to ground at pin AB/4A:
 - do a check and repair the wiring between the MMR1(40RT1) and the LGCIU1(5GA1) for pin AB/4A and pin AB/6D (Ref. ASM 34-36/01).

 (3) If there is a short to ground at pin AB/15F:

 - replace the FMGC-1 (1CA1) (Ref. AMM TASK 22-83-34-000-001) and (Ref. AMM TASK 22-83-34-400-001).
 (a) If there is a short to ground at pin AB/15F:
 - do a check and repair the wiring between the MMR1(40RT1) and the FMGC1(1CA1) for pin AB/15F and pin AB/9A (Ref. ASM 34-36/01).
 B. Do the test given in para. 3.

 TASK 34-36-00-810-853
 MMR2 Test cannot be started
 1. Possible Causes
_______________
 - MMR-2 (40RT2)

 - LGCIU-2 (5GA2)

 - FMGC-2 (1CA2)

 - wiring between the MMR2(40RT2) and the LGCIU2(5GA2)

 - wiring between the MMR2(40RT2) and the FMGC2(1CA2)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 22-83-34-000-001 Removal of the FMGC (1CA1,1CA2)
 AMM 22-83-34-400-001 Installation of the FMGC (1CA1,1CA2)
 AMM 32-31-71-000-001 Removal of the LGCIU (5GA1, 5GA2)
 AMM 32-31-71-400-001 Installation of the LGCIU (5GA1, 5GA2)
 AMM 34-36-00-740-003 BITE Test of the MMR
 AMM 34-36-31-000-002 Removal of the Multi Mode Receiver (40RT1, 40RT2)
 AMM 34-36-31-400-002 Installation of the Multi Mode Receiver (40RT1,

 40RT2)
 ASM 34-36/01

 3. Fault Confirmation
__________________
 **ON A/C ALL
R Post SB 34-1147 For A/C 001-004,051-060,
 A. Test Do the BITE test of the MMR2 (Ref. AMM TASK 34-36-00-740-003).

 4. Fault Isolation
_______________
 **ON A/C ALL
R Post SB 34-1147 For A/C 001-004,051-060,
 A. If the test gives the maintenance message
 LGCIU2(5GA2)/FMGC2(1CA2)/ MMR2(40RT2):
　
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