# NHTSA recall 21V847: PALFINGER knuckle boom cranes and wallboard cranes safety defect revision history

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

Incident: [NHTSA recall 21V847: PALFINGER knuckle boom cranes and wallboard cranes safety defect](/incidents/palfinger-nhtsa-recall-21v847-2021.md)

_No events on file. Arc G is forward-only; the recorded event log accrues from Arc G adoption. For the current state of this incident, see the incident page._

## 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/palfinger-nhtsa-recall-21v847-2021/history. REST: /v1/incidents/9a8493d9-6b93-44df-9bef-29a0082bfdf6/history. HTML: [/incidents/palfinger-nhtsa-recall-21v847-2021/history](/incidents/palfinger-nhtsa-recall-21v847-2021/history)._