GROUNDED_FOR_MAINTENANCE
Applicable alarms (1)
Likely outcomes — click to expand
Based on 26 missions where this alarm fired in the last 90 days as of 2026-10-13
Grounding vs discrepancy (of 44 ZERP issues filed on these missions)
Top work orders
- Perform a Droid Health Check on Droid · INSPECTION 20
- Repair External_Fault on Droid · MAINTENANCE_ACTION 18
- Recalibrate Droid Via WFH Flight · MAINTENANCE_ACTION 18
- Perform Droid Thruster Test Gravimetrics · MAINTENANCE_ACTION 16
- Perform Weight and Balance Survey on Droid · RECORD 14
Frequently replaced parts
| Part | P/N | Removals |
|---|---|---|
| BATTERY, DROID, P2 | 24544 | 36 |
| BRAIN, LRU, DROID, P2 | 31920 | 15 |
| ASSY, SPOOL AND LINE, DOCKING FIN, AIRCRAFT, P2 | 48477 | 7 |
| GNSS ANTENNA, DROID, P2 | 23100 | 1 |
Aggregated from fleet operations and refreshed daily. Individual outcomes may vary by site and configuration.
Background
Section titled “Background”This alarm fires when a droid is at risk of an External Fault and a Droid Left Behind (DLB) event.
Treat the affected droid as grounded. Remove it from service, install a replacement droid, and create the required maintenance records so the removed droid can receive inspection and follow-up work.
Troubleshooting Steps
Section titled “Troubleshooting Steps”graph TD
file-a-discrepancy-against-the-aircraft["<small><b>Step 1</b></small><br/>Action: File a discrepancy against the aircra..."]
file-a-replace-droid-in-aircraft-work-order["<small><b>Step 2</b></small><br/>Action: File a **Replace Droid in Aircraft** ..."]
file-a-repair-external-fault-on-droid-work-order["<small><b>Step 3</b></small><br/>Action: File a **Repair External_Fault on Dro..."]
file-a-discrepancy-against-the-aircraft --> file-a-replace-droid-in-aircraft-work-order
file-a-replace-droid-in-aircraft-work-order --> file-a-repair-external-fault-on-droid-work-order
style file-a-discrepancy-against-the-aircraft fill:#dcfce7,stroke:#22c55e,color:#14532d
style file-a-replace-droid-in-aircraft-work-order fill:#dcfce7,stroke:#22c55e,color:#14532d
style file-a-repair-external-fault-on-droid-work-order fill:#dcfce7,stroke:#22c55e,color:#14532d 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.
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