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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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02/03/21

Message Overview:

Message Name:

PITCH TRIM SYST

Message Code:

B3-006720

Associated CAS:

None

Reporting LRU: FGC 1
System Description: 22-11-00
Schematic Diagram: 22-11-00
Wiring Diagram: 31-45-01

Message Description:

Pitch trim system failure is detected by FGC 1.

Possible Causes:

  • Flight Guidance Computer (FGC) 1 (A4-FGC)
  • IAPS Card Cage (A4)
  • Pitch Trim System

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

NOTE: If this is the only MDC fault and there is no other cockpit indications or messages, the priority of possible LRU failure will be FGC, and IAPS CARD CAGE.

Quick Links:

Removal of Flight Guidance Computer (FGC) AMM 22-11-01-000-801
Installation of Flight Guidance Computer (FGC) AMM 22-11-01-400-801
Removal of Integrated Avionics Processor System (IAPS) Card Cage AMM 31-45-01-000-801
Installation of Integrated Avionics Processor System (IAPS) Card Cage AMM 31-45-01-400-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Wire Repair SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Clear Pitch Trim System failure before troubleshooting this fault.
  2. Verify L ESS BUS is powered and CB1-B6 is in.
  3. Swap FGC cards.

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

  4. Replace IAPS card cage.
  5. Do close out.

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