FLIGHT_CRITICAL_SERVICE_RESTARTED
Applicable alarms (1)
Likely outcomes — click to expand
Based on 89 missions where this alarm fired in the last 90 days as of 2026-10-13
Grounding vs discrepancy (of 41 ZERP issues filed on these missions)
Frequently replaced parts
| Part | P/N | Removals |
|---|---|---|
| BATTERY ASSY, ZIP, P2 | 27158 | 31 |
| TAIL, FIXED WING, STBD, ZIP, P2 | 21840 | 20 |
| TAIL PORT, ZIP, P2 | 31280 | 19 |
| WING STBD, ZIP, P2 | 25266 | 15 |
| WING PORT, ZIP, P2 | 24762 | 15 |
Frequently co-occurring alarms (% of the 89 missions above)
Aggregated from fleet operations and refreshed daily. Individual outcomes may vary by site and configuration.
Background
Section titled “Background”This alarm is set when a service critical for flight restarted. The alarm may clear when preflight is re-attempted, and the Aircraft may return to service if it clears.
If the alarm does not clear, keep the Aircraft out of service and escalate because the restart could indicate a software fault, intermittent hardware issue, or system instability.
Troubleshooting Steps
Section titled “Troubleshooting Steps”graph TD
re-attempt-preflight-is-the-issue-resol{"<small><b>Step 1</b></small><br/>Question: Re-attempt preflight. Is the issue re..."}
the-aircraft-may-return-to-service["<small><b>Step 2</b></small><br/>Action: The Aircraft may return to service."]
keep-aircraft-out-of-service-and-esc{{"<small><b>Step 3</b></small><br/>Escalation: Keep the Aircraft out of service. Esc..."}}
re-attempt-preflight-is-the-issue-resol -->|Yes| the-aircraft-may-return-to-service
re-attempt-preflight-is-the-issue-resol -->|No| keep-aircraft-out-of-service-and-esc
style re-attempt-preflight-is-the-issue-resol fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style the-aircraft-may-return-to-service fill:#dcfce7,stroke:#22c55e,color:#14532d
style keep-aircraft-out-of-service-and-esc fill:#fef3c7,stroke:#f59e0b,color:#78350f Hover or focus a block to preview it. Select the block to keep the preview open.
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.
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Session is too large to fit in a URL. Use Download session JSON to share the timeline out-of-band.
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