IMPACT_DETECTED_WHILE_DOCKED
Applicable alarms (1)
Likely outcomes — click to expand
Based on 8,953 missions where this alarm fired in the last 90 days as of 2026-10-13
Grounding vs discrepancy (of 51 ZERP issues filed on these missions)
Frequently replaced parts
| Part | P/N | Removals |
|---|---|---|
| LONG WING ASSY, DEPOPULATED, STBD (RH), ZIP, P2 | 0108493 | 18 |
| LONG WING ASM, PORT(LH), ZIP, P2 | 0100553 | 18 |
| SERVO, ASSY, UNIVERSAL, P2 | 20398 | 11 |
| ASSY, SPOOL AND LINE, DOCKING FIN | 48477 | 8 |
| BATTERY ASSY, ZIP, P2 | 27158 | 5 |
Frequently co-occurring alarms (% of the 8,953 missions above)
Aggregated from fleet operations and refreshed daily. Individual outcomes may vary by site and configuration.
Background
Section titled “Background”This alarm triggers when a docked Zips feels an unusually high impact.
This alarm was implemented as a prerequisite to removing pre-flight visual inspections. The rationale being that if a Zip experiences significant physical damage while docked, it should be detectable as an impact.
Therefore these impacts, and subsequent alarms, require a visual inspection of the Zip before returning it to operations.
Also see the summary slide for this feature in Software Spotlights Series.
Troubleshooting Steps
Section titled “Troubleshooting Steps”graph TD
was-the-impact-captured-on-video{"<small><b>Step 1</b></small><br/>Question: Was the impact captured on video? Obt..."}
add-it-to-the-jira-ticket["<small><b>Step 2</b></small><br/>Action: Add it to the Jira ticket."]
remove-the-zip-from-the-tower-and-perf["<small><b>Step 3</b></small><br/>Action: Remove the Zip from the tower and per..."]
did-the-inspections-pass{"<small><b>Step 4</b></small><br/>Question: Did the inspections pass?"}
the-aircraft-and-droid-may-return-to-se["<small><b>Step 5</b></small><br/>Action: The Aircraft and Droid may return to ..."]
report-your-findings-in-zerp-and-resolv["<small><b>Step 6</b></small><br/>Action: Report your findings in Zerp and reso..."]
was-the-impact-captured-on-video -->|Yes| add-it-to-the-jira-ticket
was-the-impact-captured-on-video -->|No| remove-the-zip-from-the-tower-and-perf
add-it-to-the-jira-ticket --> remove-the-zip-from-the-tower-and-perf
remove-the-zip-from-the-tower-and-perf --> did-the-inspections-pass
did-the-inspections-pass -->|Yes, all inspections passed| the-aircraft-and-droid-may-return-to-se
did-the-inspections-pass -->|No, there were some discrep...| report-your-findings-in-zerp-and-resolv
style was-the-impact-captured-on-video fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style add-it-to-the-jira-ticket fill:#dcfce7,stroke:#22c55e,color:#14532d
style remove-the-zip-from-the-tower-and-perf fill:#dcfce7,stroke:#22c55e,color:#14532d
style did-the-inspections-pass fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style the-aircraft-and-droid-may-return-to-se fill:#dcfce7,stroke:#22c55e,color:#14532d
style report-your-findings-in-zerp-and-resolv fill:#dcfce7,stroke:#22c55e,color:#14532d Hover or focus a block to preview it. Select the block to keep the preview open.
Obtain the video from the site cameras (request access from IT if you do not have it). Note the alarm timestamp and review the video to see if the impact is captured.
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.
Permalink:
Session is too large to fit in a URL. Use Download session JSON to share the timeline out-of-band.
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