4. Fault Isolation
_______________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
A. If the test gives the maintenance message NO FQI DATA:
- replace the CFDIU (1TW), (Ref. AMM TASK 31-32-34-000-001) and (Ref. AMM TASK 31-32-34-400-001).
(1) If the fault continues:
- replace the FQIC (3QT), (Ref. AMM TASK 28-42-34-000-001) and (Ref. AMM TASK 28-42-34-400-001).
(a) If the fault continues:
- do a check and repair the wiring from the CFDIU (1TW) to the FQIC (3QT) from pins AA/5F, 5G to pins AB/12F, 13F , (Ref. ASM 31-32/04).
**ON A/C 301-399,
A. If the test gives the maintenance message NO FQI DATA:
- replace the CFDIU (1TW), (Ref. AMM TASK 31-32-34-000-001) and (Ref. AMM TASK 31-32-34-400-001).
(1) If the fault continues:
- replace the FQIC (3QT), (Ref. AMM TASK 28-42-34-000-001) and (Ref. AMM TASK 28-42-34-400-001).
(a) If the fault continues:
- do a check and repair the wiring from the CFDIU (1TW) to the FQIC (3QT) from pins AA/5F, 5G to pins AB/8E, 8F (Ref. ASM 31-32/04).
**ON A/C ALL
B. Do the test given in Para. 3.B.
Loss of the Output Bus from the DMU or FDIMU to the CFDIU
1. Possible Causes
_______________
- CFDIU (1TW)
- DMU (1TV)
- DMU/FDIU (FDIMU) (10TV)
- wiring
2. Job Set-up Information
______________________
A. Referenced Information
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REFERENCE DESIGNATION
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R AMM 31-32-00-740-009 Read the AVIONICS STATUS on the MCDU AMM 31-32-34-000-001 Removal of the CFDIU (1TW) AMM 31-32-34-400-001 Installation of the CFDIU (1TW) AMM 31-36-34-000-001 Removal of the Data Management Unit (DMU) (1TV) AMM 31-36-34-000-002 Removal of the FDIU/DMU (FDIMU) (10TV) AMM 31-36-34-400-001 Installation of the Data Management Unit (DMU) (1TV) AMM 31-36-34-400-002 Installation of the FDIU/DMU (FDIMU) (10TV) ASM 31-36/01
3. Fault Confirmation
__________________
4. Fault Isolation
R A. Read the AVIONICS STATUS on the MCDU (Ref. AMM TASK 31-32-00-740-009). _______________
A. If the test gives the maintenance message NO DMU DATA:
- replace the CFDIU (1TW) (Ref. AMM TASK 31-32-34-000-001) and (Ref. AMM TASK 31-32-34-400-001).
(1) If the fault continues:
- replace the DMU (1TV) (if DMU installed) (Ref. AMM TASK 31-36-34-000-001) and (Ref. AMM TASK 31-36-34-400-001).
or
- replace the DMU/FDIU (FDIMU) (10TV) (if FDIMU installed) (Ref. AMM TASK 31-36-34-000-002) and (Ref. AMM TASK 31-36-34-400-002).
(a) If the fault continues:
- do a check and repair the wiring (Ref. ASM 31-36/01):
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞31-32-00∞∞∞∞∞∞∞∞∞∞Page 223
Feb 01/05 CES
1 from the CFDIU (1TW) pins AB/3F, 3G to the DMU (1TV) (if DMU
_
installed) pins AA/11E, 11F. or 2 from the CFDIU (1TW) pins AB/3F, 3G to the FDIMU (10TV) (if
_
FDIMU installed) pins AA/11E, 11F.
B. Do the test given in Para. 3.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞31-32-00∞∞∞∞∞∞∞∞∞∞Page 224
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