The system was originally from the Ariane 4, but the failure itself occurred on the Ariane 5's maiden flight [0]. [0]: https://en.wikipedia.org/wiki/Ariane_fli

The system was originally from the Ariane 4, but the failure itself occurred on the Ariane 5's maiden flight [0]. [0]: https://en.wikipedia.org/wiki/Ariane_flight_V88 https://en.wikipedia.org/wiki/Ariane_flight_V88