UNEXPECTED_OPEN
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Section titled “Background”This alarm occurs when the latch detected that the jaws opened while an Aircraft was retracted or retained in the Dock. This alarm typically occurs when the hall sensor that detects the open jaws is not operating correctly due to a known unreliable latch hall sensor harness. It might also occur if the Aircraft is dropped out of the latch due to a software or mechanical issue.
Troubleshooting Steps
Section titled “Troubleshooting Steps”graph TD
if-applicable-use-the-reset-latch-comm["<small><b>Step 1</b></small><br/>Action: If applicable, use the **Reset Latch*..."]
style if-applicable-use-the-reset-latch-comm fill:#dcfce7,stroke:#22c55e,color:#14532d Hover or focus a block to preview it. Select the block to keep the preview open.
Resolution note
This plaintext block is ready to paste into the Resolution Note field on the ZERP issue you're working. The permalink below gives engineering review access to the full step-by-step timeline including any back-navigation; share it if the case needs a deeper look.
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