IMPACT_DETECTED_IN_FLIGHT
Applicable alarms (1)
Likely outcomes — click to expand
Based on 12,181 missions where this alarm fired in the last 90 days as of 2026-10-13
Grounding vs discrepancy (of 173 ZERP issues filed on these missions)
Top work orders
- EV3: Replace Wing on Aircraft · MAINTENANCE_ACTION 15
- Perform Post-Paraland Inspection on Aircraft · MAINTENANCE_ACTION 14
- EV3: Inspect Aircraft after Droid Left Behind (DLB) · MAINTENANCE_ACTION 10
Frequently replaced parts
| Part | P/N | Removals |
|---|---|---|
| BATTERY ASSY, ZIP, P2 | 27158 | 123 |
| LONG WING ASSY, DEPOPULATED, PORT (LH), ZIP, P2 | 0100553 | 90 |
| LONG WING ASM,STRBRD(RH), ZIP, P2 | 0108493 | 90 |
| ASSY, SPOOL AND LINE, DOCKING FIN | 48477 | 42 |
| CCW HOVER PROPELLER BLADE, ZIP, P2 | 29857 | 37 |
Frequently co-occurring alarms (% of the 12,181 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 Zip detects an unusually high impact in flight.
This alarm was implemented as a prerequisite to removing pre-flight visual inspections. The rationale being that if a Zip experiences significant physical damage in flight, 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
lower-the-zip-off-the-tower["<small><b>Step 1</b></small><br/>Action: Lower the Zip off the tower. - TODO: ..."]
perform-the-following-inspection-draft["<small><b>Step 2</b></small><br/>Action: Perform the following inspection: Po..."]
did-the-inspections-pass{"<small><b>Step 3</b></small><br/>Question: Did the inspections pass?"}
the-aircraft-and-droid-can-return-to["<small><b>Step 4</b></small><br/>Action: The Aircraft and Droid can return to ..."]
report-your-findings-in-zerp-and-res["<small><b>Step 5</b></small><br/>Action: Report your findings in Zerp and reso..."]
lower-the-zip-off-the-tower --> perform-the-following-inspection-draft
perform-the-following-inspection-draft --> did-the-inspections-pass
did-the-inspections-pass -->|Yes, all inspections passed| the-aircraft-and-droid-can-return-to
did-the-inspections-pass -->|No, there were some discrep...| report-your-findings-in-zerp-and-res
style lower-the-zip-off-the-tower fill:#dcfce7,stroke:#22c55e,color:#14532d
style perform-the-following-inspection-draft fill:#dcfce7,stroke:#22c55e,color:#14532d
style did-the-inspections-pass fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style the-aircraft-and-droid-can-return-to fill:#dcfce7,stroke:#22c55e,color:#14532d
style report-your-findings-in-zerp-and-res fill:#dcfce7,stroke:#22c55e,color:#14532d Hover or focus a block to preview it. Select the block to keep the preview open.
- TODO: In the future, when maintenance repositions are available, we can fly the Zip to the lower Dock if a visual inspection from the ground shows that the Zip is capable of a reposition flight
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.
Did this guide help you get unblocked?
Open suggestions
There are no open suggestions.
Open pull requests
There are no open pull requests.