Aircraft Stuck During Undocking After OPEN Command Received
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Background
Section titled “Background”If an aircraft detects it is stuck on undocking after the open command has been received by the dock, this usually points to some physical issue with the fin<->latch interface. Historically, we’ve seen issues with:
- Latch faulting on opening
- Delayed latch opening
- Broken Dock lead-in funnel
- Misaligned-aligned zip fin sockets
Troubleshooting Steps
Section titled “Troubleshooting Steps”graph TD
please-ensure-that-both-the-dock-and-zi["<small><b>Step 1</b></small><br/>Action: Ground both the dock and zip while wo..."]
at-this-point-it-is-forbidden-to-reposi["<small><b>Step 2</b></small><br/>Action: **At this point, it is forbidden to r..."]
is-the-latch-service-state-faulted{"<small><b>Step 3</b></small><br/>Question: In FleetWrangler, open the Dock's **D..."}
escalate-faulted-latch-to-p2-dock-hardware{{"<small><b>Step 4</b></small><br/>Escalation: Escalate to P2 Dock Hardware On Call ..."}}
issue-aircraft-socket-and-dock-latch-inspection-work-orders["<small><b>Step 5</b></small><br/>Action: Issue the Aircraft Socket Inspection..."]
please-ensure-that-both-the-dock-and-zi --> at-this-point-it-is-forbidden-to-reposi
at-this-point-it-is-forbidden-to-reposi --> is-the-latch-service-state-faulted
is-the-latch-service-state-faulted -->|Yes| escalate-faulted-latch-to-p2-dock-hardware
is-the-latch-service-state-faulted -->|No| issue-aircraft-socket-and-dock-latch-inspection-work-orders
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style at-this-point-it-is-forbidden-to-reposi fill:#dcfce7,stroke:#22c55e,color:#14532d
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style issue-aircraft-socket-and-dock-latch-inspection-work-orders fill:#dcfce7,stroke:#22c55e,color:#14532d Hover or focus a block to preview it. Select the block to keep the preview open.
1 action
Ground both the dock and zip while working through this guide. A CONTROLLER_STUCK_ON_DOCK alarm after the dock receives the OPEN command means that a physical issue may be preventing the zip from descending smoothly during undocking. That issue could be on the zip side, dock side, or both. You may need to manually create a dock discrepancy if there isn’t one already, since zip aircraft alarms cannot create auto discrepancies with docks at the moment.
2 action
At this point, it is forbidden to reposition the aircraft to a maintenance dock. Do not attempt flying it until P2 Dock Hardware On Call has advised on the clearing criteria and the issue has been cleared.
3 question
In FleetWrangler, open the Dock's Detailed Dock Status and check the latch service state. For steps to find this view, see Detailed Dock Status and Alarms View. Is the latch service state
LATCH_SERVICE_STATE_FAULTED? 4 escalation
Escalate to P2 Dock Hardware On Call and mention that the latch faulted while transitioning from retracted to open and that the zip may be stuck in the Dock.
5 action
Issue the Aircraft Socket Inspection work order on the Zip. Then create a discrepancy on the Dock and issue the Dock Latch Pin Inspection work order on the Dock.
Resolution note
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