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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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Quick Links

06/28/19

Message Overview:

Fault Message:

RAD ALTM RCVR-XCVR #1/ BUS FAULT

Fault Code:

27660201SX

Associated CAS:

FLT SPLR DEPLOYED
(Caution)

GND LIFT DUMP
(Caution)

GND LIFT DUMP
(Advisory)

Reporting LRU: Flight Control Unit (FCU) 1
System Description: 27-60-00
Schematic Diagram: 27-60-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 34-44-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Ground Spoiler System does not receive the altitude signal from Radio Altimeter (RA) 1 for Ground Lift Dumping (GLD) function. This CAIMS report is made by Flight Control Unit (FCU) 1.

Possible Causes:

  • Flight Control Unit (FCU) 1 (A65)
  • Radio Altimeter Transceiver (RAD ALT) 1 (A67)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

Forum Articles/Infoservice/Newsletter: None

If more fault reports are made by different systems regarding the same radio altimeter, troubleshoot the radio altimeter first. The other systems that make fault reports about the RA are the GPWS, HUD, and DAU. No action required if it is reported in the fault history only. This fault is recorded when the radio altimeter is out of range or not powered.

The radio altimeter #1 can be monitored in CAIMS:

  1. SYSTEM DIAG
  2. 27-00 FLIGHT CONTROLS
  3. FLIGHT CONTROL UNIT #1
  4. LRU TEST
  5. DISPLAY MISC. & SENSORS STATUS
  6. CONFIRM
  7. Go to page 3 of 3

Quick Links:

Removal of the Flight-Control Units AMM 27-61-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Flight-Control Units AMM 27-61-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Radio Altimeter Transceivers AMM 34-44-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Radio Altimeter Transceivers AMM 34-44-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Access to System Diagnostics AMM 45-45-00-970-804 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Confirm the Radio Altimeter 1 altitude is posted on the Pilot Flight Display (PFD).

    1. If altitude is not present, go to step 4.
    2. If altitute is present, continue with next step.

  2. Swap FCU 1 with FCU 2 and reset FCUs latched faults.

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

  3. Perform wiring checks between FCU 1 and RA 1.

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.

  4. Replace Radio Altimeter 1.
  5. Do close out.

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