TASK 34-36-00-810-849
Loss of the GPS Antenna 2 Signal
1. Possible Causes
_______________
- ANTENNA-GPS ACTIVE, 2 (43RT2)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R AMM 20-28-00-912-003 Electrical Bonding of Electrical Connectors AMM 34-36-00-740-003 BITE Test of the MMR AMM 34-36-16-000-001 Removal of the GPS Active Antenna (43RT1, 43RT2) AMM 34-36-16-400-001 Installation of the GPS Active Antenna (43RT1, 43RT2)
with Teflon Seal 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) R SRM 517400 P.Block001
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).
**ON A/C ALL
4. Fault Isolation_______________
**ON A/C ALL
R Post SB 34-1147 For A/C 001-004,051-060,
R R R R R R A. If the test gives the maintenance message GPS ANTENNA2(43RT2)/COAX CABLE/MMR2(40RT2): - remove the MMR2 (Ref. AMM TASK 34-36-31-000-002) - remove the GPS antenna 2 (Ref. AMM TASK 34-36-16-000-001) - make sure that there is no moisture and/or corrosion on the coaxial cable of the GPS antenna 2 - if you find corrosion damage, refer to the Structural Repair Manual (Ref. SRM 517400 P.Block001) for types, inspection, removal, and corrosion protection - make sure that there is continuity on the coaxial cable of the GPS antenna 2 (Ref. AMM TASK 20-28-00-912-003) - replace the coaxial cable if necessary - make sure that there is discontinuity between the core and shield of the coaxial cable of the GPS antenna 2 - repair if necessary.
(1) If the fault stops: - install the MMR2 (Ref. AMM TASK 34-36-31-400-002) - install the GPS antenna 2 (Ref. AMM TASK 34-36-16-400-001).
(2) If the fault continues: - install a new ANTENNA-GPS ACTIVE, 2 (43RT2) (Ref. AMM TASK 34-36-16-400-001) - install the MMR2 (Ref. AMM TASK 34-36-31-400-002).
B. Do the test given in para. 3.
TASK 34-36-00-810-850
Loss of the CFDIU INPUT Bus on the MMR1
1. Possible Causes
_______________
- MMR-1 (40RT1)
- wiring of the CFDS DATA INPUT bus between the MMR1 (40RT1) and the first terminal block
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION
-------------------------------------------------------------------------------
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 CFDIU(1TW)/MMR1(40RT1):
- replace the MMR-1 (40RT1) (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 MMR1 (40RT1) and the first terminal block for pins AB/1E, 1F of the MMR1 (Ref. ASM 34-36/01).
B. Do the test given in para. 3.
TASK 34-36-00-810-851
Loss of the CFDIU INPUT Bus on the MMR2
1. Possible Causes
_______________
- MMR-2 (40RT2)
- wiring of the CFDS DATA INPUT bus between the MMR2 (40RT2) and the first terminal block
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION
-------------------------------------------------------------------------------
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,
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