Hover Motor Model Mismatch
Applicable alarms (4)
Likely outcomes — click to expand
Based on 102 missions where this alarm fired in the last
90 days
(for PORT_AFT_MODEL_MISMATCH) as of 2026-10-13
Grounding vs discrepancy (of 55 ZERP issues filed on these missions)
Frequently replaced parts
| Part | P/N | Removals |
|---|---|---|
| PARALAND ASSY, DROID, P2 | 18427 | 28 |
| ASSY, SPOOL AND LINE, DOCKING FIN, AIRCRAFT, P2 | 48477 | 22 |
| BRAIN, LRU, DROID, P2 | 31920 | 20 |
| TAIL, STBD, ZIP, P2 | 21840 | 20 |
| CW HOVER PROPELLER BLADE, PRE-EV2, ZIP, P2 | 31101 | 20 |
Frequently co-occurring alarms (% of the 102 missions above)
Aggregated from fleet operations and refreshed daily. Individual outcomes may vary by site and configuration.
Background
Section titled “Background”The controller detected a mismatch between the measured hover motor RPM and the controller’s internal model. This guide separates takeoff startup behavior from physical motor or propeller damage checks.
Troubleshooting Steps
Section titled “Troubleshooting Steps”graph TD
did-fail-during-takeoff{"<small><b>Step 1</b></small><br/>Question: Did this hover-motor model mismatch o..."}
follow-startup-failure-guide("<small><b>Step 2</b></small><br/>Reference: Follow the Motor Startup Failure gui...")
inspect-hover-motor-and-propeller["<small><b>Step 3</b></small><br/>Action: Inspect the affected hover motor and ..."]
was-damage-found{"<small><b>Step 4</b></small><br/>Question: Was damage found on the hover motor o..."}
replace-damaged-component["<small><b>Step 5</b></small><br/>Action: Replace the damaged component and ret..."]
escalate-zip-controls{{"<small><b>Step 6</b></small><br/>Escalation: Escalate to P2 Zip Controls On Call."}}
did-fail-during-takeoff -->|Yes| follow-startup-failure-guide
did-fail-during-takeoff -->|No| inspect-hover-motor-and-propeller
inspect-hover-motor-and-propeller --> was-damage-found
was-damage-found -->|Yes| replace-damaged-component
was-damage-found -->|No| escalate-zip-controls
style did-fail-during-takeoff fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style follow-startup-failure-guide fill:#f3e8ff,stroke:#a855f7,color:#581c87
style inspect-hover-motor-and-propeller fill:#dcfce7,stroke:#22c55e,color:#14532d
style was-damage-found fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style replace-damaged-component fill:#dcfce7,stroke:#22c55e,color:#14532d
style escalate-zip-controls fill:#fef3c7,stroke:#f59e0b,color:#78350f Hover or focus a block to preview it. Select the block to keep the preview open.
References:
EV2
- Inspect Hover Motor - General
- Hover Motor Damage Limits
- Inspect Hover Propeller - General
- Hover Propeller Damage Limits
EV3
- Inspect Hover Motor
- Hover Motor Damage Limits
- Inspect Hover Propeller
- Hover Propeller Damage Limits
Resolution note
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