# ADS crash report in Austin, TX involving a TESLA Model Y (NHTSA SGO 13781-13647) revision history

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

Incident: [ADS crash report in Austin, TX involving a TESLA Model Y (NHTSA SGO 13781-13647)](/incidents/nhtsa-sgo-13781-13647.md)

## Recorded posture

- First recorded event: 2026-07-12
- Last material change: 2026-07-12
- Last editorial change: 2026-07-12
- Material event count: 2
- Editorial event count: 2

## Material events (2)

- **2026-07-12**: field_updated on `severity` `minor` -> `minor` (source: https://www.nhtsa.gov/laws-regulations/standing-general-order-crash-reporting#report-13781-13647) (reported)
- **2026-07-12**: field_updated on `severity` set to `minor` (source: https://www.nhtsa.gov/laws-regulations/standing-general-order-crash-reporting#report-13781-13647) (reported)

## Editorial events (2)

- **2026-07-12**: field_updated on `bodilyInjurySeverity` (source: https://www.nhtsa.gov/laws-regulations/standing-general-order-crash-reporting#report-13781-13647)
- **2026-07-12**: field_updated on `bodilyInjurySeverity` (source: https://www.nhtsa.gov/laws-regulations/standing-general-order-crash-reporting#report-13781-13647)

## 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/nhtsa-sgo-13781-13647/history. REST: /v1/incidents/eeaf9668-340b-45d8-8d6a-399a2b7de913/history. HTML: [/incidents/nhtsa-sgo-13781-13647/history](/incidents/nhtsa-sgo-13781-13647/history)._