Undocking Failure Due to Motor Mismatch
Applicable alarms (11)
Likely outcomes — click to expand
Based on 0 missions where this alarm fired in the last
90 days
(for UNDOCKING_FAILURE_DUE_TO_MOTOR_MISMATCH) as of 2026-10-13
Aggregated from fleet operations and refreshed daily. Individual outcomes may vary by site and configuration.
Background
Section titled “Background”At the start of undocking when the props throttle up, the controller continuously monitors the motor rpms as measured by the motors and compares it to the controller\u2019s internal model of the rpm. If the mismatch between model and measure is too high, undocking is cancelled.
Troubleshooting Steps
Section titled “Troubleshooting Steps”graph TD
there-are-different-directions-dependin{"<small><b>Step 1</b></small><br/>Question: There are different directions depend..."}
inspect-hover-propeller-and-motor["<small><b>Step 2</b></small><br/>Action: Inspect the propeller and motor for a..."]
inspect-mixed-propeller-and-motor["<small><b>Step 3</b></small><br/>Action: Inspect the propeller and motor for a..."]
was-any-damage-found{"<small><b>Step 4</b></small><br/>Question: Was any damage found?"}
replace-the-damaged-component-and-retur["<small><b>Step 5</b></small><br/>Action: Replace the damaged component and ret..."]
escalate-to-p2-zip-controls-on-call{{"<small><b>Step 6</b></small><br/>Escalation: Escalate to P2 Zip Controls On Call."}}
there-are-different-directions-dependin -->|If the error code refers to...| inspect-hover-propeller-and-motor
there-are-different-directions-dependin -->|If the error code refers to...| inspect-mixed-propeller-and-motor
inspect-hover-propeller-and-motor --> was-any-damage-found
inspect-mixed-propeller-and-motor --> was-any-damage-found
was-any-damage-found -->|Yes| replace-the-damaged-component-and-retur
was-any-damage-found -->|No| escalate-to-p2-zip-controls-on-call
style there-are-different-directions-dependin fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style inspect-hover-propeller-and-motor fill:#dcfce7,stroke:#22c55e,color:#14532d
style inspect-mixed-propeller-and-motor fill:#dcfce7,stroke:#22c55e,color:#14532d
style was-any-damage-found fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style replace-the-damaged-component-and-retur fill:#dcfce7,stroke:#22c55e,color:#14532d
style escalate-to-p2-zip-controls-on-call fill:#fef3c7,stroke:#f59e0b,color:#78350f Hover or focus a block to preview it. Select the block to keep the preview open.
- See UMM: Inspect Hover Propeller - General
- See UMM: Inspect Hover Motor - General
- See UMM: Inspect Mixed Propeller - General
- See UMM: Inspect Mixed Motor
- Additionally, manually turn the mixed motor shaft to see if it spins freely, unusual noise or binding is not permitted.
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