To launch an investigation is to start an official inquiry, publicly and with people assigned to it. Somebody is now looking into what went wrong.
It takes into: launch an investigation into the crash. Launch is the announcing verb — it is how a ship, a product and an inquiry all begin — so the phrase implies that the starting was itself news. Open one is the quieter version, drop one is the end nobody wanted, and under investigation is the state a person is in while it runs.
1phraselaunch an investigationTo start an official inquiry.
“The board will launch an investigation into the crash.”
launch an investigation is the start of an official inquiry.
Practised in Common Word Pairs