I am probably going to be shot down in flames for this as I have been before for my opinion on this

, the way I see it is............
Corrective Action comes in 2 parts, firstly the fix (sticking plaster/bandaid) and then the RCA, possibly an
FMEA and then a control plan to prevent it/or similar happening again.
Prevetnive Action is the risk based decision making before implementing anynew process, service, product etc, which should include a process flow, and FMEA and a control plan to prevent it ever happening in the first place.
Chrissie
....................taxi for Chrissie