# da Vinci X/Xi/5 recall: software error let instrument arms failing a ball-screw diagnostic stay in use revision history

Append-only Arc G field-change log. Forward-only honesty: events accrue from Arc G adoption.

Incident: [da Vinci X/Xi/5 recall: software error let instrument arms failing a ball-screw diagnostic stay in use](/incidents/davinci-instrument-arm-diagnostic-recall-2026.md)

## Recorded posture

- First recorded event: 2026-06-04
- Last material change: 2026-06-04
- Material event count: 1
- Editorial event count: 0

## Material events (1)

- **2026-06-04**: created (source: baseline:arc-g)

## Forward-only note

Arc G is forward-only. The event log accrues from the Arc G adoption point. Fields with no events post-baseline equal the current cached value and are not independently verified at any prior date.

_Canonical URL: /incidents/davinci-instrument-arm-diagnostic-recall-2026/history. REST: /v1/incidents/7d97d0f6-5ac1-4b4b-9727-27ed83b907a2/history. HTML: [/incidents/davinci-instrument-arm-diagnostic-recall-2026/history](/incidents/davinci-instrument-arm-diagnostic-recall-2026/history)._