imu.health.alarms.LINK_DEGRADED
Applicable alarms (1)
Likely outcomes — click to expand
Based on 0 missions where this alarm fired in the last 90 days as of 2026-10-13
Aggregated from fleet operations and refreshed daily. Individual outcomes may vary by site and configuration.
Background
Section titled “Background”imu.health.alarms.LINK_DEGRADED indicates a degraded IMU communication link. Current guidance is to treat this as a hardware connection issue between the affected compute and the distro board.
Troubleshooting Steps
Section titled “Troubleshooting Steps”graph TD
determine-affected-compute["<small><b>Step 1</b></small><br/>Action: Determine whether the alarm is set on..."]
which-compute-has-the-alarm{"<small><b>Step 2</b></small><br/>Question: Which compute has imu.health.alarms...."}
replace-fore-compute-to-distro-flex-cable["<small><b>Step 3</b></small><br/>Action: Create work orders to replace the fle..."]
replace-aft-compute-to-distro-flex-cable["<small><b>Step 4</b></small><br/>Action: Create work orders to replace the fle..."]
is-the-alarm-cleared{"<small><b>Step 5</b></small><br/>Question: Is imu.health.alarms.LINK_DEGRADED ..."}
return-to-service("<small><b>Step 6</b></small><br/>Reference: The Aircraft may return to service.")
escalate-to-avionics-hardware{{"<small><b>Step 7</b></small><br/>Escalation: Escalate to P2 Avionics Hardware On C..."}}
determine-affected-compute --> which-compute-has-the-alarm
which-compute-has-the-alarm -->|/compute_a| replace-fore-compute-to-distro-flex-cable
which-compute-has-the-alarm -->|/compute_b| replace-aft-compute-to-distro-flex-cable
replace-fore-compute-to-distro-flex-cable --> is-the-alarm-cleared
replace-aft-compute-to-distro-flex-cable --> is-the-alarm-cleared
is-the-alarm-cleared -->|Yes| return-to-service
is-the-alarm-cleared -->|No| escalate-to-avionics-hardware
style determine-affected-compute fill:#dcfce7,stroke:#22c55e,color:#14532d
style which-compute-has-the-alarm fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style replace-fore-compute-to-distro-flex-cable fill:#dcfce7,stroke:#22c55e,color:#14532d
style replace-aft-compute-to-distro-flex-cable fill:#dcfce7,stroke:#22c55e,color:#14532d
style is-the-alarm-cleared fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style return-to-service fill:#f3e8ff,stroke:#a855f7,color:#581c87
style escalate-to-avionics-hardware fill:#fef3c7,stroke:#f59e0b,color:#78350f Hover or focus a block to preview it. Select the block to keep the preview open.
imu.health.alarms.LINK_DEGRADED set?WORK ORDER TEMPLATE: Use the work order template that matches the hardware version:
- Work Order Template #1050 - EV3: Replace Distro To FWD Flight Computer Flex Harness
- Work Order Template #242 - EV2: Replace Distro, Winch or Tail Zip Flex Harness
WORK ORDER TEMPLATE: Use the work order template that matches the hardware version:
- Work Order Template #1049 - EV3: Replace Distro To AFT Flight Computer Flex Harness
- Work Order Template #242 - EV2: Replace Distro, Winch or Tail Zip Flex Harness
imu.health.alarms.LINK_DEGRADED cleared after the flex cable replacement?Resolution note
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