I looked at avherald.com which usually has comprehensive reports of incidents but this flight doesn’t appear in their list because nobody has reported the incident yet. If you get your relatives to email what happened into the editor there, he might be able to find other info and flesh out the description and analysis of what happened:
https://avherald.com/h?contact=&opt=0
(edited to add: if they’re nervous flyers perhaps the last thing you want to do is point them to avherald’s exhaustive list of incidents... :-)