PROPELLER_STRIKE_DETECTED
Applicable alarms (1)
Likely outcomes — click to expand
Based on 416 missions where this alarm fired in the last 90 days as of 2026-10-13
Grounding vs discrepancy (of 210 ZERP issues filed on these missions)
Top work orders
- EV2: Replace Hover Propeller on Aircraft · MAINTENANCE_ACTION 22
- Perform Post-Paraland Inspection on Aircraft · MAINTENANCE_ACTION 19
- Perform Post-Paraland Inspection on Droid · ADMINISTRATIVE 16
- EV2: Replace Hover Motor on Aircraft · MAINTENANCE_ACTION 11
- EV3: Inspect Aircraft after Droid Left Behind (DLB) · MAINTENANCE_ACTION 10
Frequently replaced parts
| Part | P/N | Removals |
|---|---|---|
| BATTERY ASSY, ZIP, P2 | 27158 | 164 |
| CCW/CW HOVER MOTOR ASSY, ZIP, P2 | 19607 | 99 |
| CCW HOVER PROPELLER BLADE, ZIP, P2 | 29857 | 94 |
| CW HOVER PROPELLER BLADE, ZIP, P2 | 31101 | 92 |
| CW HOVER MOTOR ASSY, ZIP, P2 | 33333 | 73 |
Frequently co-occurring alarms (% of the 416 missions above)
Aggregated from fleet operations and refreshed daily. Individual outcomes may vary by site and configuration.
Applicable to all hardware versions
Background
Section titled “Background”PROPELLER_STRIKE_DETECTED may be raised by the hover or mixed motors. It currently only motivates in flight decision making in very specific cases such as hover down and motor shutdown during excessive vibe. Because of false positive risk, it is not ready to motivate maintenance action at this time. As such, it should be disregarded when making troubleshooting or maintenance decisions.
Troubleshooting Steps
Section titled “Troubleshooting Steps”graph TD
disregard-this-alarm["<small><b>Step 1</b></small><br/>Action: Disregard this alarm in any troublesh..."]
style disregard-this-alarm fill:#dcfce7,stroke:#22c55e,color:#14532d Hover or focus a block to preview it. Select the block to keep the preview open.
PROPELLER_STRIKE_DETECTED alone to motivate inspection, repair, replacement, or other maintenance action unless otherwise directed. If there are other alarms, follow the guides for those alarms. If there are no other alarms, the Aircraft may return to service.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.