Space.com by By Amy Thompson 3/15/2020
The Falcon 9 rocket's onboard computer triggered an abort just before a scheduled 9:22 a.m. EDT (1322 GMT) liftoff after detecting an issue with one of its nine Merlin 1D engines.
"Standing down today; standard auto-abort triggered due to out of family data during engine power check. Will announce next launch date opportunity once confirmed on the Range," SpaceX tweeted shortly after the abort.
The Falcon 9 first stage for this launch is a veteran SpaceX booster. The rocket has launched four flights for SpaceX. Its fifth launch for the Starlink mission would make it SpaceX's first to fly five times.
More:
https://www.space.com/spacex-starlink-5-satellites-launch-abort.html
