(b) If the ground scanning gives at least two maintenance messages of the two lists below: First list:
 - ELAC2 COM OR INPUT OF THS ACTR XDCR1 9CE

 - ELAC2 OR WIRING FROM L G ELEV POS XDCR 34CE1

 - ELAC2 OR WIRING FROM R Y ELEV POS XDCR 34CE2 Second list:

 - ELAC2 MON OR INPUT OF THS ACTR XDCR1 9CE

 - ELAC2 OR WIRING FROM L ELEV POS MON XDCR

 - ELAC2 OR WIRING FROM R ELEV POS MON XDCR

 - ELAC2 OR WIRING FROM L B ELEV MODE XDCR 34CE3

 - ELAC2 OR WIRING FROM R Y ELEV MODE XDCR 34CE4

 1 First case:
_ Combination of maintenance messages of the first list, do this trouble shooting procedure (Ref. TASK 27-90-00-810-814).
 2 Second case:
_ Combination of maintenance messages of the second list, do this trouble shooting procedure (Ref. TASK 27-90-00-810-815).
 3 Third case:
_ Combination of maintenance messages of the first and second lists, do this trouble shooting procedure (Ref. TASK 27-90-00-810-816).
 (c) If the ground scanning gives at least two maintenance messages of the list below: ELAC2 COM OR INPUT OF THS ACTR XDCR1 9CE SEC2 COM OR INPUT OF THS ACTR XDCR3 9CE L G ELEV MODE XDCR 34CE1 COM E2/S2:USE STBY XDCR R Y ELEV MODE XDCR 34CE2 COM E2/S2:USE STBY XDCR
 - do this trouble shooting procedure (Ref. TASK 27-90-00-810-823).
 4. Fault Isolation
_______________
 A. If the BITE test gives the maintenance message:
 ELAC2 COM OR INPUT OF THS ACTR XDCR1 9CE

 - replace the ELAC-2 (2CE2), (Ref. AMM TASK 27-93-34-000-001) and (Ref. AMM TASK 27-93-34-400-001).
 (1) If the fault continues:

 - replace the command position transducer, (Ref. AMM TASK 27-44-56-000-001) and (Ref. AMM TASK 27-44-56-400-001).

 (2) If the fault continues:

 - do a check of the wiring of the XDCR COM SPLY signal from the THS actuator (9CE) to the first terminal block, (Ref. ASM 27-93/13).
 (a) If there is no continuity, repair the wiring.
 「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 ∞∞27-93-00∞∞∞∞∞∞∞∞∞∞Page 264
 Aug 01/99R CES

 (b) If there is continuity:
 - do a check and repair the wiring of the XDCR COM V1, V2 signals from the THS actuator (9CE) to the ELAC 2 (2CE2), (Ref. ASM 27-93/13).
 B. Do the tests 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 ∞∞27-93-00∞∞∞∞∞∞∞∞∞∞Page 265
 Aug 01/99R
 CES  Loss of the THS Monitor Transducer Signal for the ELAC 2

 1. Possible Causes
_______________
 - ELAC-2 (2CE2)

 - monitor position transducer

 - command position transducer

 - wiring of the XDCR MON SPLY signal from the THS actuator (9CE) to the first terminal block

 - wiring of the XDCR MON V1, V2 signals from the THS actuator (9CE) to the

 ELAC 2 (2CE2) R - wiring of the XDCR COM V1, V2 signals from the THS actuator (9CE) to the R ELAC 2 (2CE2)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
27-90-00-810-814 Loss of the ACS1 Signal of the ELAC2 COM Side 27-90-00-810-815 Loss of the ACS1 Signal of the ELAC2 MON Side 27-90-00-810-816 Loss of the ACS1 of the ELAC2 COM and MON Sides 27-90-00-810-824 Loss of the ACS1 Signal of the ELAC2 MON Side and
 SEC2 MON Side AMM 27-44-56-000-001 Removal of the Position Transducer from the THS Actuator 9CE AMM 27-44-56-400-001 Installation of the Position Transducer to the THS
 Actuator 9CE
 AMM 27-93-34-000-001 Removal of the ELAC (2CE1,2CE2)
 AMM 27-93-34-400-001 Installation of the ELAC (2CE1,2CE2)
 AMM 27-96-00-710-022 Operational Test of the THS Actuator Electrical

 Control (Activation for BITE Test)
 AMM 27-96-00-740-001 BITE Test of the EFCS (Ground Scanning)
 ASM 27-93/13

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the THS actuator electrical control (Ref. AMM TASK 27-96-00-710-022).
　
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