Degraded AFE Comms
Applicable alarms (2)
Likely outcomes — click to expand
Based on 44 missions where this alarm fired in the last
90 days
(for AFE_TELEMETRY_TIMEOUT) as of 2026-10-13
Grounding vs discrepancy (of 41 ZERP issues filed on these missions)
Top work orders
- EV2 Zip Detailed Battery Inspection · TROUBLESHOOTING 22
- EV2/EV3 Perform Preflight Without Motors · INSPECTION 12
Frequently replaced parts
| Part | P/N | Removals |
|---|---|---|
| BATTERY ASSY, ZIP, P2 | 27158 | 49 |
| CCW HOVER MOTOR ASSY, ZIP, P2 | 19607 | 12 |
| CW HOVER MOTOR ASSY, ZIP, P2 | 33333 | 8 |
Frequently co-occurring alarms (% of the 44 missions above)
Aggregated from fleet operations and refreshed daily. Individual outcomes may vary by site and configuration.
Background
Section titled “Background”These alarms occur when too much time has elapsed since valid AFE telemetry was received or if we never established successful communication with the AFE on the battery pack. This typically indicates a failure with the data connectors from the distro to the AFE.
Troubleshooting Steps
Section titled “Troubleshooting Steps”graph TD
ev2-inspect-battery-to-distro-harness["<small><b>Step 1</b></small><br/>Action: Complete a detailed inspection of th..."]
ev3-inspect-battery-to-distro-harness["<small><b>Step 2</b></small><br/>Action: Complete a detailed inspection of th..."]
check-if-maintenance-required{"<small><b>Step 3</b></small><br/>Question: Does anything require maintenance or ..."}
perform-maintenance-or-replacement["<small><b>Step 4</b></small><br/>Action: Perform the required maintenance or r..."]
reconnect-the-data-cables["<small><b>Step 5</b></small><br/>Action: Twist the M5 data cable connectors wi..."]
reboot-aircraft["<small><b>Step 6</b></small><br/>Action: Power cycle the aircraft./procedur..."]
check-if-issue-persists-after-repair{"<small><b>Step 7</b></small><br/>Question: Does AFE_TELEMETRY_TIMEOUT, AFE_CO..."}
escalate-to-p2-firmware-power-on-call{{"<small><b>Step 8</b></small><br/>Escalation: Escalate to P2 Firmware Power On Call."}}
the-aircraft-may-return-to-service("<small><b>Step 9</b></small><br/>Reference: The Aircraft may return to service.")
ev2-inspect-battery-to-distro-harness --> check-if-maintenance-required
ev3-inspect-battery-to-distro-harness --> check-if-maintenance-required
check-if-maintenance-required -->|Yes| perform-maintenance-or-replacement
check-if-maintenance-required -->|No| reconnect-the-data-cables
perform-maintenance-or-replacement --> reboot-aircraft
reconnect-the-data-cables --> reboot-aircraft
reboot-aircraft --> check-if-issue-persists-after-repair
check-if-issue-persists-after-repair -->|Yes| escalate-to-p2-firmware-power-on-call
check-if-issue-persists-after-repair -->|No| the-aircraft-may-return-to-service
style ev2-inspect-battery-to-distro-harness fill:#dcfce7,stroke:#22c55e,color:#14532d
style ev3-inspect-battery-to-distro-harness fill:#dcfce7,stroke:#22c55e,color:#14532d
style check-if-maintenance-required fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style perform-maintenance-or-replacement fill:#dcfce7,stroke:#22c55e,color:#14532d
style reconnect-the-data-cables fill:#dcfce7,stroke:#22c55e,color:#14532d
style reboot-aircraft fill:#dcfce7,stroke:#22c55e,color:#14532d
style check-if-issue-persists-after-repair fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style escalate-to-p2-firmware-power-on-call fill:#fef3c7,stroke:#f59e0b,color:#78350f
style the-aircraft-may-return-to-service fill:#f3e8ff,stroke:#a855f7,color:#581c87 Hover or focus a block to preview it. Select the block to keep the preview open.
Select a hardware variant above to start this troubleshooting flow.
AFE_TELEMETRY_TIMEOUT, AFE_CONFIGURATION_FAILED, or any other power-related alarm return?Resolution note
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