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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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10/31/24

Message Overview:

Message Name:

LAVATORY OR GALLEY WATER SYSTEM 'EMPTY' LED IS YELLOW

Identifier: 381OBS005
Effectivity: Aircraft 20501 - 20999
System: Waste and Water
Associated CAS: None
Reporting LRU: Water Module
System Description: SMM 38-10-00
Schematic Diagram: None
Wiring Diagram: SWM 38-10-00

Message Description:

The lavatory or galley water system 'EMPTY' LED is yellow.

Possible Causes:

  • Galley Water Tank is Empty
  • Lavatory Water Tank is Empty

Required Conditions:

  • Aircraft power ON
  • Cabin Management System ON

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

NOTES:

Quick Links:

Filling the Potable Water System SMM TASK 12-15-00-610-801
Functional Test of the Potable Water System SMM TASK 38-10-00-720-801

Troubleshooting Recommendations:

  1. Turn ON aircraft power and allow the Cabin Management System to boot up.
  2. On the Galley Control Panel (GCP) navigate to the Water System and select either Galley Equipment or Lavatory Equipment depending on which water tank is empty. Verify the status shows EMPTY.
  3. At the Galley or Lavatory verify the RESET push button switch is flashing.
  4. Service the potable water tank per SMM TASK 12-15-00-610-801.
  5. After servicing the Galley/Lavatory potable water tank push the REST button located in the Galley or lavatory area.
  6. Allow the water system to pressurize for 10 seconds. The water pump will stay running at a idle mode until the faucet handle is opened. Allow 15 minutes for warm water.
  7. Perform the Functional Test of the Potable Water System per SMM TASK 38-10-00-720-801.
  8. Do close out.

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