James Davison has confirmed a brake master cylinder was to blame for his spectacular exit from the Indianapolis 500.
Davison caused the first caution of the day after stopping on track with his right front tyre on fire.
Replays showed the brake disc glowing as though Davison had his foot hard on the brakes, an action not usually associated with the Indy 500, before the disc shattered, breaking the wheel hub and causing the whole assembly to catch fire.
Speaking via the Dale Coyne Racing team website after the race, Davison added: “Well, that’s obviously heart-braking to go out of the Indy 500 in the first handful of laps with a mechanical issue.
"I’ve got to thank my team for all their hard work throughout the event, our car felt good and we had gotten by Alonso and I was pretty excited for the race ahead.
"Unfortunately, it just wasn’t meant to be, but hopefully we will be back next year with the Jacob Construction car running a bit stronger."