(2)
Open the access panels 133AL, 192NB, 171AL.
(3)
Remove the cap from the fill/drain port at the water service panel 2023VU.
Subtask 38-14-00-480-050
D. Connection of the Drain Hoses
(1)
Connect the drain hose to the potable water fill and drain port at the service panel 2023VU.
(2)
Connect the drain hose to the potable water drain-port at the forward drain panel.
(3)
Connect the drain hose to the drain port at the drain and overflow panel.
R **ON A/C 151-199, 301-399, 401-499,
Subtask 38-14-00-010-050-A
C. Get Access
(1)
Put the access platform in position at Zone 171.
(2)
Open the access panels 133AL, 171AL.
(3)
Remove the cap from the fill/drain port at the water service panel 2023VU.
Subtask 38-14-00-480-050-A
D. Connection of the Drain Hoses
(1)
Connect the drain hose to the potable water fill and drain port at the service panel 2023VU.
(2)
Connect the drain hose to the potable water drain-port at the forward drain panel.
**ON A/C ALL
Subtask 38-14-00-860-052
E. Aircraft Maintenance Configuration
(1)
Make sure that all the water shutoff valves in the lavatories and galleys are open.
(2)
Make sure that all the water heaters are turned off.
(3)
Make sure that there is enough water in the system before you do this test.
4. Procedure
_________ R **ON A/C 001-049, 051-099, 101-149, 201-299,
Subtask 38-14-00-710-050
A. Do this test.
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. At the service panel 2023VU:
-turn and pull the control handle from the NORMAL position to the DRAIN position.
At the service panel 2023VU, the drain panel 133AL and the drain and overflow panel 192NB:
-
the motorized fill/drain valve 16MAopens.
-
the motorized drain valve 4MP opens.
-
the motorized overflow valve 8MP opens.
-
the motorized drain valve 14MP opens.
-
the drain valve control light 2MP comes on.
-
the overflow valve control light 6MP comes on.
-
the drain valve control light 12MP comes on.
-water flows from the three drain ports.
-------------------------------------------------------------------------------
ACTION RESULT -------------------------------------------------------------------------------
-push and turn the control handle from the DRAIN position to the NORMAL position.
2. At the circuit breaker panel 2001VU: - open the circuit breaker 1MP.
NOTE : This section of the text
____ is to test the valves mechanically.
3. At the service panel 2023VU:
-turn and pull the control handle from the NORMAL position to the DRAIN position.
-
the motorized fill/drain valve 16MAcloses.
-
the drain valve control light 2MP goes off.
-
the motorized drain valve 4MP closes.
-
the motorized drain valve 14MP closes.
-
the motorized overflow valve 8MP closes.
-
the overflow valve control light 6MP goes off.
-
the drain valve control light 12MP goes off.
-
the flow of water stops from the drain ports.
At the service panel 2023VU:
-
the motorized drain valve 4MP is out of operation.
-
the motorized overflow valve 8MP isout of operation.
-
the motorized drain valve 14MP is out of operation.
At the service panel 2023VU, the drain panel 133AL and the drain and overflow panel 192NB:
-
the motorized fill/drain valve 16MAopens.
-water flows from the drain port.
-
the motorized drain valve 4MP stays closed.
-
the motorized overflow valve 8MP stays closed.
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