TASK 23-24-00-810-823

 Loss of the Frequency Control by the ACARS MU on the RMP3
 1. Possible Causes
_______________
 - RMP-COM FREQ SEL, 3 (1RG3)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 23-13-13-000-001 Removal of the Radio Management Panel (CRMP) (1RG1, 1RG2, 1RG3) AMM 23-13-13-400-001 Installation of the Radio Management Panel (CRMP)
 (1RG1, 1RG2, 1RG3) AMM 23-24-00-710-001 Operational Test of the ACARS ASM 23-24/01
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the ACARS (Ref. AMM TASK 23-24-00-710-001).
 4. Fault Isolation
_______________
 A. If, during the operational test, the ACARS cannot control the VHF3
 frequency through the RMP3 only:

 - replace the RMP-COM FREQ SEL, 3 (1RG3) (Ref. AMM TASK 23-13-13-000-001) and (Ref. AMM TASK 23-13-13-400-001).
 (1) If the fault continues:
 - repair the wiring of the DFS PORT SELECT DISCRETE from RMP3 (1RG3) pin A/F to the first terminal block (Ref. ASM 23-24/01).
 B. Do the test given in Para. 3.

R **ON A/C 062-099,
R TASK 23-24-00-810-824 R Loss of the ACARS MU/VHF3 Interface R 1. Possible Causes
_______________
R - XCVR-VHF, 3 (1RC3)
R - MU-ACARS (1RB)
R - wiring between the ACARS MU and the VHF 3 transceiver

R 2. Job Set-up Information

______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R AMM 23-12-00-740-001 R AMM 23-12-33-000-001 R AMM 23-12-33-400-001 R R AMM 23-24-34-000-001 R AMM 23-24-34-400-001 R ASM 23-24/01
R 3. Fault Confirmation
__________________
R A. Test
BITE Test of the VHF System
Removal of the VHF Transceiver (1RC1, 1RC2, 1RC3)
Installation of the VHF Transceiver (1RC1, 1RC2,
1RC3)
Removal of the ACARS Management Unit (MU) (1RB)
Installation of the ACARS Management Unit (MU) (1RB)

R (1) Do the BITE test of the VHF system (Ref. AMM TASK 23-12-00-740-001).
R NOTE : Do this test for the VHF 3 only.
____
R 4. Fault Isolation
_______________
R A. If the test gives the maintenance message :
R ACARS MU1 (1RB1)/VHF3 (1RC3)

R (1) If the ACARS indication comes into view in the ACTIVE display window
R of the RMP where the VHF 3 is set:
R - replace the XCVR-VHF, 3 (1RC3) (Ref. AMM TASK 23-12-33-000-001) and
R (Ref. AMM TASK 23-12-33-400-001).

R (a) If the fault continues:
R - replace the MU-ACARS (1RB), (Ref. AMM TASK 23-24-34-000-001)
R and (Ref. AMM TASK 23-24-34-400-001).

 「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 : 062-099, ∞∞23-24-00∞∞∞∞∞∞∞∞∞∞Page 224
 May 01/05 CES

R  (b) If the fault continues: 
R  - remove the VHF 3 transceiver (Ref. AMM TASK 23-12-33-000-001) 
R  - remove the ACARS MU (Ref. AMM TASK 23-24-34-000-001) 
R  - check and repair the wiring between the ACARS MU and the VHF 3 
R  transceiver between pins AA/7A, 7B and pins AB/11A, 11B (Ref. 
R  ASM 23-24/01) 
R  - install the ACARS MU (Ref. AMM TASK 23-24-34-400-001) 
R  - install the VHF 3 transceiver (Ref. AMM TASK 23-12-33-400-001). 
R  B. Do the test given in Para. 3.A.

 SATELLITE COMMUNICATION - FAULT ISOLATION PROCEDURES
____________________________________________________
 TASK 23-28-00-810-801
 Failure of the Satellite Data Unit (SDU)

 1. Possible Causes
_______________
 - SDU (105RV1)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 23-28-00-740-001 BITE Test of the Satellite Communication System AMM 23-28-34-000-001 Removal of the Satellite Data Unit (SDU) 105RV1 AMM 23-28-34-400-001 Installation of the Satellite Data Unit (SDU) 105RV1
 3. Fault Confirmation
__________________
　
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