(a) Disconnect the applicable connector from the selector valve.
(b) Use a multimeter to do a check of the resistance between pins B and C (retract solenoid) and pins D and E (extend solenoid). The resistance must be between 53 ohms and 78 ohms.
(c) Connect pin B to pin C, and pin D to pin E.
(d) Use a 50Vdc Isolation Tester to do a check of the resistance between pin A (electrical ground), and pins B and C together. Do the same check between pin A, and pins D and E together. The resistance value must be greater than 400 Megohms.
(e) Disconnect pin B from pin C, and pin D from pin E, and connect the connector disconnected in Para. (a).
R (8) From the results of the continuity and isolation tests: - If the the solenoid fails one of the tests, go to Para. (10). - If the two tests are OK, do the next step.
R (9) Do a check and repair the aircraft wiring between the LGCIU 1 (2) and the selector valve (40GA) (Ref. ASM 32-31/05) (Ref. ASM 32-31/06).
R (10) Do the test given in Para. (2): - if the fault continues, do the next step.
R (11) Replace the SEL VALVE-L/G (40GA), (Ref. AMM TASK 32-31-12-000-001) and (Ref. AMM TASK 32-31-12-400-001).
R (12) Do the test given in Para. (2):
5. Close-up________
A. Remove the ground support and maintenance equipment, the special and standard tools and all other items.
B. Put the aircraft back to its initial configuration.
TASK 32-31-00-810-807
L/G Doors Selector Valve System Fault
WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______
GEAR.
WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______
START A TASK ON OR NEAR:
- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND THE RELATED DOORS
- COMPONENTS THAT MOVE.
1. Possible Causes
_______________
- LGCIU-1 (5GA1)
- LGCIU-2 (5GA2)
- SEL VALVE-L/G DOORS (41GA)
- aircraft wiring
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific multimeter
No specific 50Vdc Isolation Tester
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 32-31-00-710-002 Operational Test of the Landing Gear Doors AMM 32-31-34-000-001 Removal of the L/G Door Selector Valve 41GA AMM 32-31-34-400-001 Installation of the L/G Door Selector Valve 41GA AMM 32-31-71-000-001 Removal of the LGCIU (5GA1, 5GA2) AMM 32-31-71-400-001 Installation of the LGCIU (5GA1, 5GA2) ASM 32-31/05 ASM 32-31/06
「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 ∞∞32-31-00∞∞∞∞∞∞∞∞∞∞Page 212
May 01/02R CES
3. Fault Confirmation
__________________
A. Table of the circuit breakers used in this procedure:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU L/G/LGCIU/SYS1/NORM 1GA C09 121VU HYDRAULIC/LGCIU/SYS2 2GA Q35
B. Test
R (1) If the ECAM WARNING 'LGCIU2 FAULT' is shown after the L/G Free Fall R extension has been operated in flight. No further maintenance action R is necessary . R
R NOTE : The ECAM WARNING can be shown with the failure message
____ R 'L/G DOORS SEL VALVE 41GA'. R
R (2) Do an operational test of the L/G doors with the two LGCIUs:
(a) At the panel 121VU, open and close the C/B HYDRAULIC/LGCIU/SYS 2 (2GA) to make sure LGCIU-1 controls the L/G system.
NOTE : If the L/G doors are open and will not close (so they are
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 起落架 LANDING GEAR 1(8)
