(2) Do the BITE test of the EFCS (ground scanning) (Ref. AMM TASK 27-96-00-740-001).
(a) If the ground scanning gives the maintenance message: ELAC2 MON OR INPUT OF THS ACTR XDCR1 9CE - refer to Para. Fault Isolation.
(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
R 1_ First case: Combination of maintenance messages of the first list, do this trouble shooting procedure (Ref. TASK 27-90-00-810-814).
R 2_ Second case: Combination of maintenance messages of the second list, do this trouble shooting procedure (Ref. TASK 27-90-00-810-815).
R R 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).
R R (c) If the ground scanning gives at least two maintenance messages of the list below: ELAC2 MON OR INPUT OF THS ACTR XDCR1 9CE SEC2 MON OR INPUT OF THS ACTR XDCR3 9CE L ELEV POS MON XDCR OF ELAC2/SEC2 R Y ELEV POS MON XDCR OF ELAC2/SEC2 L B ELEV MODE XDCR 34CE3 R Y ELEV MODE XDCR 34CE4 - do this trouble shooting procedure (Ref. TASK 27-90-00-810-824).
4. Fault Isolation
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A. If the BITE test gives the maintenance message: ELAC2 MON 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 monitor position transducer, (Ref. AMM TASK 27-44-56-000-001) and (Ref. AMM TASK 27-44-56-400-001).
(2) 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).
(3) If the fault continues: - do a check of the wiring of the XDCR MON 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.
R R R R (b) If there is continuity: - do a check of the wiring of the XDCR MON V1, V2 signals from the THS actuator (9CE) to the ELAC 2 (2CE2), (Ref. ASM 27-93/13). - 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.
Loss of the Servo Motor 1 Signal on the THS Actuator for the ELAC 2
1. Possible Causes
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- ELAC-2 (2CE2)
- motor 1 assembly of the pitch trim actuator
- wiring of the ANO 3 signal from the ELAC 2 (2CE2) to the ELAC 2 (2CE2)
- wiring of the command signal from the THS actuator (9CE) to the ELAC 2 (2CE2)
- pitch trim actuator
2. Job Set-up Information
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A. Referenced Information
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REFERENCE DESIGNATION
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AMM 27-44-57-000-001 Removal of the Pitch Trim Actuator from the THS Actuator 9CE AMM 27-44-57-000-003 Removal of the Motor Assemblies of the Pitch Trim Actuator AMM 27-44-57-400-001 Installation of the Pitch Trim Actuator to the THS Actuator 9CE AMM 27-44-57-400-003 Installation of the Motor Assemblies of the Pitch
Trim Actuator
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) R AMM 27-96-00-740-001 BITE Test of the EFCS (Ground Scanning) ASM 27-93/13
3. Fault Confirmation
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A. Test
(1) Do the operational test of the THS actuator electrical control (Ref. AMM TASK 27-96-00-710-022).
NOTE : Do the ground setting only with the ELAC 2.
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(2) Do the BITE test of the EFCS (Ground Scanning) (Ref. AMM TASK 27-96-00-740-001).
4. Fault Isolation
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A. If the BITE test gives the maintenance message: ELAC 2 OR OUTPUT TO THS ACTR SERVO MOT 1 9CE
- replace the ELAC-2 (2CE2), (Ref. AMM TASK 27-93-34-000-001) and (Ref. AMM TASK 27-93-34-400-001).
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