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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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06/28/19

Message Overview:

Fault Message:

ACPC SECONDARY LOGIC CARD4-A22 FAIL

Fault Code:

2451309ACP

Associated CAS:

ELEC SYS FAIL
Caution

Reporting LRU: Secondary Logic Card (SLC)
System Description: 24-50-00
Schematic Diagram: 24-51-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 24-51-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Secondary Logic Card has detected an internal failure.

Possible Causes:

  • Secondary Logic Card (SLC) 4
  • Left Microprocessor Card
  • Right Microprocessor Card
  • A/D Converter Card

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

The following are the main functions of SLC4:

  1. Control of AC 4 feeder (K25) and EHP 3A (K24) contactors.
  2. Current sensing and over-current protection (current > 121%) for AC 4 feeder and EHP 3A feeder.
  3. Control of AC 4 cabin relay (K26 and CB-B1).
  4. Monitors voltage presence on AC 4 bus.
  5. Monitors three external manually operated switches.

    1. EHP 3A Manual Switch.
    2. Right AFT Engine Run Command Switch.
    3. Right AFT Boost Pump Inhibit Switch.

  6. Monitors status of AC 4 feeder, EHP 3A feeder, AC 4 cabin relay.
  7. Monitor thermal circuit breakers.

    1. AC 4 CABIN FEED (CB-B1).
    2. APU BATT HEAT (CB-A1).

  8. Provides interface to microprocessor.

Quick Links:

Removal of the AC Power Center (ACPC)
Fault-Tolerant Microprocessor		 AMM 24-51-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the AC Power Center (ACPC)
Fault-Tolerant Microprocessor		 AMM 24-51-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the AC Power Center (ACPC) Secondary Logic AMM 24-51-13-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the AC Power Center (ACPC) Secondary Logic AMM 24-51-13-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the AC Power Center (ACPC)
External AC-to-DC Converter		 AMM 24-51-17-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the AC Power Center (ACPC)
External AC-to-DC Converter		 AMM 24-51-17-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Swap SLC 4 with SLC 1, 2 or 3.

    1. If system checks are good, replace SLC 4 and do close out.
    2. If fault remains, continue with next step.

  2. Swap microprocessor cards.

    1. If system checks are good, replace defective microprocessor card and do close out.
    2. If fault remains, continue with next step.

  3. Replace AD Converter card.
  4. Do close out.

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