1. Possible Causes
_______________
- FAC-2 (1CC2)
- wiring of the YAW ENGD COM and YAW ENGD MON discretes (from the FAC 2 (1CC2) to the first terminal block)
- wiring of the YAW OWN ENGD COM and YAW OWN ENGD MON discretes (from the FAC 2 (1CC2) to the first terminal block)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 22-60-00-710-002 Operational Test of the Automatic Change-Over
Function
AMM 22-66-34-000-002 Removal of the FAC (1CC1,1CC2)
AMM 22-66-34-400-002 Installation of the FAC (1CC1,1CC2)
AMM 22-96-00-710-001 Operational Test of the AFS
ASM 22-68/04
3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of the AFS (Ref. AMM TASK 22-96-00-710-001) and read the result for the FAC 2.
(2) Do the operational test of the automatic change-over function (Ref. AMM TASK 22-60-00-710-002).
4. Fault Isolation
_______________
A. If the operational test of the AFS gives the maintenance message AFS: FAC2/YD ENGD FDBK:
(1) If the operational test of the automatic change-over function gives the maintenance message AFS: FAC1/YD ENGD CHG-OV:
- replace the FAC-2 (1CC2), (Ref. AMM TASK 22-66-34-000-002) and (Ref. AMM TASK 22-66-34-400-002).
(a) If the fault continues:
- do a check and repair the wiring of the YAW ENGD COM and YAW ENGD MON discretes (from the FAC 2 (1CC2) to the first terminal block), (Ref. ASM 22-68/04).
「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 ∞∞22-63-00∞∞∞∞∞∞∞∞∞∞Page 211
Feb 01/03R CES
(2) If the operational test of the automatic change-over function does not give the maintenance message AFS: FAC1/YD ENGD CHG-OV:
- replace the FAC 2 (1CC2) (Ref. AMM TASK 22-66-34-000-002) and (Ref. AMM TASK 22-66-34-400-002).
(a) If the fault continues:
- do a check and repair the wiring of the YAW OWN ENGD COM and YAW OWN ENGD MON discretes (from the FAC 2 (1CC2) to the first terminal block) (Ref. ASM 22-68/04).
B. Do the test given in Para. 3.A.(1).
「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 ∞∞22-63-00∞∞∞∞∞∞∞∞∞∞Page 212
Feb 01/03R
CES Loss of the Signal from the Yaw-Damper Position Transducer-Unit (2CC) to the FAC 1
1. Possible Causes
_______________
- FAC-1 (1CC1)
- XDCR UNIT-YAW DAMPER POS (2CC)
- wiring of the 26VAC signal at RVDT box (2CC)
- wiring of the ground signal at RVDT box (2CC)
- wirings of the YAW V1 MON and YAW V2 MON discretes (from the RVDT box (2CC) to the FAC 1 (1CC1)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 22-63-00-710-001 Operational Test of the Yaw Damper Function AMM 22-66-34-000-002 Removal of the FAC (1CC1,1CC2) AMM 22-66-34-400-002 Installation of the FAC (1CC1,1CC2) AMM 22-96-00-710-001 Operational Test of the AFS AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
External Power AMM 27-26-17-000-001 Removal of the Yaw Damper Position Transducer Unit 2CC AMM 27-26-17-400-001 Installation of the Yaw Damper Position Transducer Unit 2CC AMM 29-10-00-863-003 Pressurize the Blue Hydraulic System with a Ground Power Supply
AMM 29-23-00-863-001 Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
AMM 29-24-00-863-001 Pressurize the Yellow Hydraulic System with the
Electric Pump
ASM 22-68/04
3. Fault Confirmation
__________________
WARNING : MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE
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