UDP_BRIDGE_REDUNDANCY_ERROR
Applicable alarms (1)
Likely outcomes — click to expand
Based on 846,963 missions where this alarm fired in the last 90 days as of 2026-10-13
Grounding vs discrepancy (of 4,536 ZERP issues filed on these missions)
Top work orders
- EV2: Inspect Aircraft after Droid Left Behind (DLB) · MAINTENANCE_ACTION 231
- EV3: Inspect Aircraft after Droid Left Behind (DLB) · MAINTENANCE_ACTION 215
- Inspect Droid after Droid Left Behind (DLB) · MAINTENANCE_ACTION 185
- Reset Droid after DLB · REPAIR 117
- EV2: Replace Aft Motor Assembly on Aircraft · MAINTENANCE_ACTION 91
Frequently replaced parts
| Part | P/N | Removals |
|---|---|---|
| SERVO, ASSY, UNIVERSAL, P2 | 20398 | 1,009 |
| CCW HOVER MOTOR ASSY, ZIP, P2 | 19607 | 870 |
| ASSY, SPOOL AND LINE, DOCKING FIN, AIRCRAFT, P2 | 48477 | 783 |
| AFT MOTOR ASSY, ZIP, P2 | 23548 | 721 |
| TAIL ASSY STBD(RH), PRE-EV2, ZIP, P2 | 21840 | 624 |
Aggregated from fleet operations and refreshed daily. Individual outcomes may vary by site and configuration.
Background
Section titled “Background”This alarm occurs when a loss of motor comms redundancy has been detected by software on the Zip Compute. This can occur briefly during motor startup or shutdown, but should not persist long enough to fail preflight.
Troubleshooting Steps
Section titled “Troubleshooting Steps”graph TD
is-this-the-sole-alarm-that-is-causing{"<small><b>Step 1</b></small><br/>Question: Is this the sole alarm that is causin..."}
power-cycle-the-aircraft-refer-to-power["<small><b>Step 2</b></small><br/>Action: Power cycle the aircraft. Refer to P..."]
is-this-alarm-still-alerting-after-a-pow{"<small><b>Step 3</b></small><br/>Question: Is this alarm still alerting after a ..."}
escalate-to-embedded-linux-oncall{{"<small><b>Step 4</b></small><br/>Escalation: Escalate to **Embedded Linux Oncall**."}}
return-aircraft-to-service("<small><b>Step 5</b></small><br/>Reference: Return aircraft to service.")
perform-troubleshooting-steps-for-the-ot["<small><b>Step 6</b></small><br/>Action: Perform troubleshooting steps for the..."]
is-this-the-sole-alarm-that-is-causing -->|Yes| power-cycle-the-aircraft-refer-to-power
is-this-the-sole-alarm-that-is-causing -->|No| perform-troubleshooting-steps-for-the-ot
power-cycle-the-aircraft-refer-to-power --> is-this-alarm-still-alerting-after-a-pow
is-this-alarm-still-alerting-after-a-pow -->|Yes| escalate-to-embedded-linux-oncall
is-this-alarm-still-alerting-after-a-pow -->|No| return-aircraft-to-service
style is-this-the-sole-alarm-that-is-causing fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style power-cycle-the-aircraft-refer-to-power fill:#dcfce7,stroke:#22c55e,color:#14532d
style is-this-alarm-still-alerting-after-a-pow fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style escalate-to-embedded-linux-oncall fill:#fef3c7,stroke:#f59e0b,color:#78350f
style return-aircraft-to-service fill:#f3e8ff,stroke:#a855f7,color:#581c87
style perform-troubleshooting-steps-for-the-ot fill:#dcfce7,stroke:#22c55e,color:#14532d Hover or focus a block to preview it. Select the block to keep the preview open.
Resolution note
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