ERROR_HOVER_PORT_FWD_RESISTANCE
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Applicable alarms (1)
ERROR_HOVER_PORT_FWD_RESISTANCE
Likely outcomes — click to expand
Based on 2 missions where this alarm fired in the last 90 days as of 2026-10-13
Grounding vs discrepancy (of 3 ZERP issues filed on these missions)
Frequently replaced parts
| Part | P/N | Removals |
|---|---|---|
| PREPPED HOVER HARNESSING, PORT, ZIP, P2 | 0117554 | 7 |
Aggregated from fleet operations and refreshed daily. Individual outcomes may vary by site and configuration.
Background
Section titled “Background”This alarm occurs when high resistance is detected in the port fwd hover motor’s DC power path.
Troubleshooting Steps
Section titled “Troubleshooting Steps”WORK ORDER TEMPLATE: Use Work Order Template #590: Troubleshoot Hover Motor Resistance on Aircraft.
NOTE: For all inspections, attach photos of the areas inspected to the ticket, including specific photos of issues.
graph TD
inspect-the-motor-in-question["<small><b>Step 1</b></small><br/>Action: Inspect the motor in question for any..."]
remove-unseat-all-bolted-connections["<small><b>Step 2</b></small><br/>Action: Remove/unseat all bolted connections ..."]
clean-and-reseat-the-bolted-connection["<small><b>Step 3</b></small><br/>Action: Clean and reseat the bolted connectio..."]
run-preflight-in-mx-dock["<small><b>Step 4</b></small><br/>Action: Run preflight in MX Dock."]
result-of-mx-dock{"<small><b>Step 5</b></small><br/>Question: Result of MX Dock"}
return-asset-to-service["<small><b>Step 6</b></small><br/>Action: Return Asset to service"]
escalate-to-p2-busbars-on-call{{"<small><b>Step 7</b></small><br/>Escalation: Escalate to P2 Busbars On Call."}}
perform-maintenance-accordingly["<small><b>Step 8</b></small><br/>Action: Perform maintenance accordingly"]
inspect-the-motor-in-question --> remove-unseat-all-bolted-connections
remove-unseat-all-bolted-connections --> clean-and-reseat-the-bolted-connection
clean-and-reseat-the-bolted-connection --> run-preflight-in-mx-dock
run-preflight-in-mx-dock --> result-of-mx-dock
result-of-mx-dock -->|PASSES ALL CHECKS| return-asset-to-service
result-of-mx-dock -->|FAILS RESISTANCE CHECK| escalate-to-p2-busbars-on-call
result-of-mx-dock -->|FAILS FOR SEPARATE ISSUE| perform-maintenance-accordingly
style inspect-the-motor-in-question fill:#dcfce7,stroke:#22c55e,color:#14532d
style remove-unseat-all-bolted-connections fill:#dcfce7,stroke:#22c55e,color:#14532d
style clean-and-reseat-the-bolted-connection fill:#dcfce7,stroke:#22c55e,color:#14532d
style run-preflight-in-mx-dock fill:#dcfce7,stroke:#22c55e,color:#14532d
style result-of-mx-dock fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style return-asset-to-service fill:#dcfce7,stroke:#22c55e,color:#14532d
style escalate-to-p2-busbars-on-call fill:#fef3c7,stroke:#f59e0b,color:#78350f
style perform-maintenance-accordingly fill:#dcfce7,stroke:#22c55e,color:#14532d Hover or focus a block to preview it. Select the block to keep the preview open.
1 action
Inspect the motor in question for any off nominals or signs of damage.
2 action
Remove/unseat all bolted connections (including shrink wrap and potting) on the faulting motor power path. This includes joints at the motor, at the Power Distribution Board, and at additional joints (wing elbow joints for forward motors and the busbar to busbar connection for aft motors). Note any cross threading or loose bolted connections.
3 action
Clean and reseat the bolted connections along this path. Remove fod and torque stripes between surfaces.
4 action
Run preflight in MX Dock.
5 question
Result of MX Dock
6 action
Return Asset to service
7 escalation
Escalate to P2 Busbars On Call.
8 action
Perform maintenance accordingly
Resolution note
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Example ZipMissionLog
Section titled “Example ZipMissionLog”Example ZipMissionLog for a failure due to ERROR_HOVER_PORT_FWD_RESISTANCE. The error report can be found in the failure_summaries field.
The error report is caused by an alarm. No alarm report included since a report does not exist.
{ "status": "ZIP_MISSION_STATUS_ENDED_IN_FAILURE", "asset_id": "p2-zip-371", "dock_ids": [ "p2-dock-84" ], "droid_id": "p2-droid-499", "timestamp": "2025-05-07T19:41:43.781Z", "flight_ids": [ "P2F_65AB1116D7C1594C" ], "mission_id": "P2M_65AB11142DC00000", "ibit_status": [], "capabilities": { "can_dock": "CAPABILITY_STATUS_DISABLED", "can_avoid": "CAPABILITY_STATUS_UNSPECIFIED", "can_hover": "CAPABILITY_STATUS_AVAILABLE", "can_cruise": "CAPABILITY_STATUS_AVAILABLE", "can_launch": "CAPABILITY_STATUS_FAILED", "can_deliver": "CAPABILITY_STATUS_DISABLED", "can_transit": "CAPABILITY_STATUS_AVAILABLE", "has_package": "CAPABILITY_STATUS_DISABLED", "can_failover": "CAPABILITY_STATUS_UNSPECIFIED", "can_paraland": "CAPABILITY_STATUS_DISABLED", "is_on_ground": "CAPABILITY_STATUS_DISABLED", "are_motors_off": "CAPABILITY_STATUS_AVAILABLE", "can_deconflict": "CAPABILITY_STATUS_UNSPECIFIED", "can_spin_motors": "CAPABILITY_STATUS_DISABLED", "is_droid_stowed": "CAPABILITY_STATUS_DISABLED", "can_perform_ibit": "CAPABILITY_STATUS_AVAILABLE", "can_control_droid": "CAPABILITY_STATUS_AVAILABLE", "can_control_winch": "CAPABILITY_STATUS_UNSPECIFIED", "is_droid_lid_open": "CAPABILITY_STATUS_DISABLED", "is_compute_healthy": "CAPABILITY_STATUS_UNSPECIFIED", "is_crossfire_alive": "CAPABILITY_STATUS_DISABLED", "is_droid_in_portal": "CAPABILITY_STATUS_AVAILABLE", "can_gnc_spin_motors": "CAPABILITY_STATUS_DISABLED", "is_in_dock_corridor": "CAPABILITY_STATUS_DISABLED", "is_retained_on_dock": "CAPABILITY_STATUS_AVAILABLE", "has_passed_all_ibits": "CAPABILITY_STATUS_DISABLED", "is_retracted_on_dock": "CAPABILITY_STATUS_AVAILABLE", "is_transit_completed": "CAPABILITY_STATUS_DISABLED", "can_transit_nominally": "CAPABILITY_STATUS_UNSPECIFIED", "is_cut_line_completed": "CAPABILITY_STATUS_UNSPECIFIED", "is_delivery_completed": "CAPABILITY_STATUS_DISABLED", "is_take_off_completed": "CAPABILITY_STATUS_DISABLED", "can_transit_with_droid": "CAPABILITY_STATUS_UNSPECIFIED", "is_call_home_completed": "CAPABILITY_STATUS_UNSPECIFIED", "can_reach_mission_goals": "CAPABILITY_STATUS_AVAILABLE", "is_dock_motion_completed": "CAPABILITY_STATUS_DISABLED", "is_lower_droid_completed": "CAPABILITY_STATUS_DISABLED", "is_raise_droid_completed": "CAPABILITY_STATUS_DISABLED", "can_droid_lower_to_portal": "CAPABILITY_STATUS_DISABLED", "are_diagnostic_ibits_reset": "CAPABILITY_STATUS_DISABLED", "can_droid_raise_from_portal": "CAPABILITY_STATUS_AVAILABLE", "can_receive_delivery_mission": "CAPABILITY_STATUS_AVAILABLE", "has_received_pending_mission": "CAPABILITY_STATUS_DISABLED", "is_take_off_time_window_open": "CAPABILITY_STATUS_AVAILABLE", "can_droid_execute_motion_cmds": "CAPABILITY_STATUS_UNSPECIFIED", "has_received_delivery_mission": "CAPABILITY_STATUS_DISABLED", "is_crossfire_disarm_requested": "CAPABILITY_STATUS_DISABLED", "is_diagnostic_abort_requested": "CAPABILITY_STATUS_DISABLED", "is_performing_partial_takeoff": "CAPABILITY_STATUS_DISABLED", "are_diagnostic_ibits_completed": "CAPABILITY_STATUS_DISABLED", "can_receive_reposition_mission": "CAPABILITY_STATUS_AVAILABLE", "is_software_download_completed": "CAPABILITY_STATUS_DISABLED", "has_received_reposition_mission": "CAPABILITY_STATUS_DISABLED", "is_crossfire_gnc_mode_requested": "CAPABILITY_STATUS_DISABLED", "is_crossfire_paraland_requested": "CAPABILITY_STATUS_DISABLED", "is_delivery_hydration_completed": "CAPABILITY_STATUS_DISABLED", "can_communicate_with_remote_pilot": "CAPABILITY_STATUS_AVAILABLE", "is_winch_emergency_hold_completed": "CAPABILITY_STATUS_UNSPECIFIED", "is_emergency_lower_droid_completed": "CAPABILITY_STATUS_UNSPECIFIED" }, "failure_summaries": [ "gps_timestamp": 1746042167544960000, "error_report": { "primary_unique_error_id": "ERR_123456", "errors": { "ERR_123456": { "code": 0x00010005, "message": "CanLaunch failed", "gps_timestamp": 173651165380000000, "unix_timestamp": 1024658498.45, "unique_id": "ERR_5123541254", "related_alarm_summaries": [{ "relation_type": RelationType::CAUSED_BY, "alarm": { "alarm_id": 17, "identifier": "motor_manager.status", "name": "ERROR_HOVER_PORT_FWD_RESISTANCE", "alarm_namespace": "alarms", } }] } } }, "executive_task": "RunPreliminaryChecks", "flight_id": "P2F_65AB1116D7C1594C", "flight_status": "FLIGHT_STATUS_FAILED", "winch_cutter_state": "WINCH_CUTTER_STATE_UNARMED" ]}Did this guide help you get unblocked?
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