Civil Aviation Daily Occurrence Report - not an incident, an occurrence of something non standard. As above the missed approached was carried out without explanation...
Not every one is investigated, I have read a CADORS report that involved a company A/C and the pilot never even knew it had happened (Busted airspace near YYJ) nor did the company receive a call. I understand that if it was an occurrence that compromised flight safety, then it triggers a follow up.