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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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For AOG assistance contact:

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Quick Links

01/25/21

Message Overview:

ELEC HYD GEN FAIL
(Caution)

DDG Reference: None
Pilot Action (QRH): ELEC 04-5
System Description: 24-33-00
Schematic Diagram: 24-33-00
Wiring Diagram: 24-33-01
24-33-03

Message Description:

The amber 'ELEC HYD GEN FAIL' caution CAS message indicates the hydraulic powered generator is unavailable. Five seconds after the selection of the Hydraulic Motor Driven Generator to ON, the line contactor is still OPEN, or the HMDG is selected to ON and the line contactor is open for at least 20 seconds.

Possible Causes:

  • Emergency DC-Power System Component(s)

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the APU Generator AMM 24-31-09-000-801
Installation of the APU Generator AMM 24-31-09-400-801
Operational Test of the APU Generator AMM 24-31-09-710-801
Operational Test of the HMDG System AMM 24-33-00-710-801
Removal of the Hydraulic-Motor Driven Generator (HMDG) AMM 24-33-01-000-801
Installation of the Hydraulic-Motor Driven Generator (HMDG) AMM 24-33-01-400-801
Wiring - Maintenance Practices - ALL SPM 20-12-00-02
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Do the Operational Test of the Hydraulic-Motor Driven Generator (HMDG).

    1. If the test is satisfactory, no more action is required.
    2. If the test is not satisfactory, continue with the next step.

  2. Go to one of the following MDC Troubleshooting procedures if present during the Operational Test:

    advanced_diagnostics

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