**ON A/C ALL
TASK 38-31-00-810-824
Toilet Assembly Failure
1. Possible Causes
_______________
- Water Quantity
- Water Line Connections
- flush switch
- Flush Control Unit (FCU)
- Water Valve
- Blockage
- Flush Valve
- Flush Ring
- Water Valve Screen
- Potable Water Line Connections
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 12-15-38-613-001 Fill the Potable Water Tank System (Aircraft
Electrical Power Available)
AMM 38-30-00-615-001 Blockage Removal from the Toilet Flush Valve
AMM 38-31-00-710-009 Operational Test of the Toilet Unit
AMM 38-31-00-740-001 BITE Test of the Vacuum Toilet System
AMM 38-31-12-000-001 Removal of the Flush Control Unit
AMM 38-31-12-400-001 Installation of the Flush Control Unit
AMM 38-31-19-000-001 Removal of the Toilet Flush Switch
AMM 38-31-19-400-001 Installation of the Toilet Flush Switch
AMM 38-31-55-000-001 Removal of the Water Valve
AMM 38-31-55-400-001 Installation of the Water Valve
AMM 38-31-57-000-001 Removal of the Flush Valve
AMM 38-31-57-400-001 Installation of the Flush Valve
ASM 38-31/11
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299,
38-31-00-991-001 Fig. 201
「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 ∞∞38-31-00∞∞∞∞∞∞∞∞∞∞Page 237
May 01/05 CES
**ON A/C ALL
3. Fault Confirmation
__________________ R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299,
A. Fault Confirmation
(1) Make sure that the circuit breakers of the vacuum toilet system are closed.
(2) Do an operational test of the toilet assembly (Ref. AMM TASK 38-31-00-710-009).
B. Do the bite test (Ref. AMM TASK 38-31-00-740-001).
**ON A/C ALL
4. Fault Isolation
_______________ R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299,
A. If the FAP gives the maintenance message LAV X INOP:
(1) Refer to the LAST LEG REPORT or PREVIOUS LEGS REPORT page of the bite test.
(2) Refer to the trouble shooting data page of the bite test. (Ref. Fig. 201/TASK 38-31-00-991-001)
B. If the toilet will not rinse or flush when the flush switch is pushed:
- do a check on all the other toilets.
(1) If the other toilets also do not rinse or flush:
- do a check of the Water Quantity on the forward attendant panel 120RH.
(2) If the water level is low or the tank is empty:
- fill the potable water tank 3000MM (Ref. AMM TASK 12-15-38-613-001).
(3) If the fault continues:
- Open and close the circuit breaker 32MG or 34MG.
- do a check of the potable Water Line Connections. NOTE : Make sure that the shut off valve 3025MM is open.
(4) If the fault continues:
- do a check for continuity between pins B and K of the plug 50MG1/A, 50MG2/A, 50MG3/A, 50MG4/A or 50MG7/A with the flush switch pushed (Ref. ASM 38-31/11).
- if there is continuity with the flush switch release:
- replace the flush switch, (Ref. AMM TASK 38-31-19-000-001) and (Ref. AMM TASK 38-31-19-400-001).
(5) If the fault continues:
- replace the Flush Control Unit (FCU), (Ref. AMM TASK 38-31-12-000-001) and (Ref. AMM TASK 38-31-12-400-001).
(6) If the fault continues:
- replace the Water Valve, (Ref. AMM TASK 38-31-55-000-001) and (Ref. AMM TASK 38-31-55-400-001).
(7) If the toilet outlet stays open:
- do a check of the flush valve for Blockage
- remove and clean as necessary (Ref. AMM TASK 38-30-00-615-001).
(a) If the fault continues:
- replace the Flush Valve, (Ref. AMM TASK 38-31-57-000-001) and (Ref. AMM TASK 38-31-57-400-001).
(b) If the fault continues:
- replace Flush Control Unit (FCU), (Ref. AMM TASK 38-31-12-000-001) and (Ref. AMM TASK 38-31-12-400-001).
(8) If toilet bowl is constantly rinsed:
- disconnect the electrical connector of the water valve from the flush control unit (FCU).
(a) If the fault continues:
- replace the Water Valve, (Ref. AMM TASK 38-31-55-000-001) and (Ref. AMM TASK 38-31-55-400-001).
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