https://techcrunch.com/2021/05/17/rocket-lab-recovered-the-first-stage-from-its-failed-may-15-launch-a-silver-lining-for-its-reusability-program/

Rocket Lab may have experienced mission failure and total payload loss during the company’s 20th planned mission on May 15, but it wasn’t all bad news, the company said in an update Monday.

Importantly, the Electron rocket’s first stage – which contain nine Rutherford engines – performed as designed and did not contribute to the flight failure. Rocket Lab further said the first stage completed a successful ocean splashdown using a parachute and that the company was able to retrieve it, and bring it back to its production complex.