GNSS_TIMED_OUT
Applicable alarms (1)
Likely outcomes — click to expand
Based on 777,379 missions where this alarm fired in the last 90 days as of 2026-10-13
Grounding vs discrepancy (of 5,342 ZERP issues filed on these missions)
Top work orders
- EV3: Inspect Aircraft after Droid Left Behind (DLB) · MAINTENANCE_ACTION 199
- Troubleshoot Hover Motor Resistance on Aircraft · INSPECTION 75
- EV2: Troubleshoot Electrical Contacts on Aircraft and Droid · INSPECTION 65
- Reset Droid Lid · TROUBLESHOOTING 56
- EV2: ZCO-2026-08-03 Lower Foam Wear Pad Retrofit (FRCO-286 / SB-2026-023) · UPGRADE_RETROFIT 29
Frequently replaced parts
| Part | P/N | Removals |
|---|---|---|
| SERVO, ASSY, UNIVERSAL, P2 | 20398 | 916 |
| CCW HOVER MOTOR ASSY, ZIP, P2 | 19607 | 795 |
| ASSY, SPOOL AND LINE, DOCKING FIN, AIRCRAFT, P2 | 48477 | 725 |
| TAIL ASSY STBD(RH), PRE-EV2, ZIP, P2 | 21840 | 624 |
| PRE-PREG TAIL ASSY PORT(LH), ZIP, P2 | 31280 | 594 |
Aggregated from fleet operations and refreshed daily. Individual outcomes may vary by site and configuration.
Background
Section titled “Background”This alarm is set if we lose communication with the GNSS peripheral or our 3rd party vendor PointOne’s positioning engine
Troubleshooting Steps
Section titled “Troubleshooting Steps”graph TD
power-cycle-the-aircraft-power-cycle-air["<small><b>Step 1</b></small><br/>Action: Power cycle the Aircraft Power Cycl..."]
perform-preflight["<small><b>Step 2</b></small><br/>Action: Perform preflight."]
has-the-alarm-cleared{"<small><b>Step 3</b></small><br/>Question: Has the alarm cleared?"}
return-the-aircraft-to-service("<small><b>Step 4</b></small><br/>Reference: Return the Aircraft to service")
escalate-to-embedded-linux-on-call{{"<small><b>Step 5</b></small><br/>Escalation: Escalate to P2 Embedded Linux On Call"}}
power-cycle-the-aircraft-power-cycle-air --> perform-preflight
perform-preflight --> has-the-alarm-cleared
has-the-alarm-cleared -->|Yes| return-the-aircraft-to-service
has-the-alarm-cleared -->|No| escalate-to-embedded-linux-on-call
style power-cycle-the-aircraft-power-cycle-air fill:#dcfce7,stroke:#22c55e,color:#14532d
style perform-preflight fill:#dcfce7,stroke:#22c55e,color:#14532d
style has-the-alarm-cleared fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style return-the-aircraft-to-service fill:#f3e8ff,stroke:#a855f7,color:#581c87
style escalate-to-embedded-linux-on-call 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.
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.