- replace the SATELLITE DATA UNIT (5RV1) (Ref. AMM TASK 23-28-34-000-001) and (Ref. AMM TASK 23-28-34-400-001).
 (a) If the fault continues:
 - replace the ATSU (1TX1) (Ref. AMM TASK 46-21-34-000-001) and (Ref. AMM TASK 46-21-34-400-001).
 1 If the fault continues:
_
 - remove the SATCOM SDU and the ATSU

 - do a check and repair the wiring of the SATCOM DATA BUS : between pins AB/1J,1K of the SATCOM SDU and pins AA/4C,4D of the ATSU (Ref. ASM 46-21/05)

 - install the SATCOM SDU and the ATSU.

 B. Do the test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 106-149, 151-199, 201-299, 301-399, ∞∞46-21-00∞∞∞∞∞∞∞∞∞∞Page 217
 401-499, Aug 01/05 CES

 Loss of the CFDIU Data Detected by the ATSU
 1. Possible Causes
_______________
 - CFDIU (1TW)

 - ATSU (1TX1)

 - wiring of the CFDIU DATA BUS

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 31-32-34-000-001 Removal of the CFDIU (1TW)
 AMM 31-32-34-400-001 Installation of the CFDIU (1TW)
 AMM 46-21-00-740-001 BITE Test of the ATIMS
 AMM 46-21-34-000-001 Removal of the Air Traffic Service Unit (ATSU) (1TX1)
 AMM 46-21-34-400-001 Installation of the Air Traffic Service Unit (ATSU)

 (1TX1)
 ASM 46-21/05

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the BITE test of the ATIMS (Ref. AMM TASK 46-21-00-740-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message CFDIU(1TW)/ATSU1(1TX1):
 - 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 ATSU (1TX1) (Ref. AMM TASK 46-21-34-000-001) and (Ref. AMM TASK 46-21-34-400-001).
 (a) If the fault continues:
 - remove the CFDIU and the ATSU

 - do a check and repair the wiring of the CFDIU DATA BUS: between pins AB/11D,11E of the CFDIU and pins AA/8A,8B of the ATSU (Ref. ASM 46-21/05)

 - install the CFDIU and the ATSU.

 B. Do the test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 106-149, 151-199, 201-299, 301-399, ∞∞46-21-00∞∞∞∞∞∞∞∞∞∞Page 218
 401-499, Aug 01/05 CES Loss of the CPMU data by the ATSU

 1. Possible Causes
_______________
 - CABIN MANAGEMENT INTERFACE UNIT (2RF)

 - ATSU (1TX1)

 - wiring of the Cabin Terminal 1 DATA BUS

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 23-74-31-000-001 Removal of the Cabin Management Terminal AMM 23-74-31-400-001 Installation of the Cabin Management Terminal AMM 46-21-00-740-001 BITE Test of the ATIMS AMM 46-21-34-000-001 Removal of the Air Traffic Service Unit (ATSU) (1TX1) AMM 46-21-34-400-001 Installation of the Air Traffic Service Unit (ATSU)
 (1TX1)
 ASM 46-21/05

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the BITE test of the ATIMS (Ref. AMM TASK 46-21-00-740-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message CT1(2RF)/ATSU1(1TX1):
 - replace the CABIN MANAGEMENT INTERFACE UNIT (2RF) (Ref. AMM TASK 23-74-31-000-001) and (Ref. AMM TASK 23-74-31-400-001).
 (1) If the fault continues:
 - replace the ATSU (1TX1) (Ref. AMM TASK 46-21-34-000-001) and (Ref. AMM TASK 46-21-34-400-001).
 (a) If the fault continues:
 - remove the Cabin Management Interface Unit and the ATSU

 - do a check and repair the wiring of the Cabin Terminal 1 DATA BUS: between the ATSU and the Cabin Management Interface Unit (Ref. ASM 46-21/05).

 - install the Cabin Management Interface Unit and the ATSU

 B. Do the test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 106-149, 151-199, 201-299, 301-399, ∞∞46-21-00∞∞∞∞∞∞∞∞∞∞Page 219
　
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