Various mechanisms exist for pilots who wish to anonymously report errors and omissions in the cockpit, in the hope that others will not repeat their mistakes. The May 1983 "Flight Safety Focus"(#43) carried a report of an incident which one hopes has only happened once in the history of aviation.
Log entry from pilot: "Autoland carried out. The aircraft landed very firmly and well to left of centerline. Most unsatisfactory."
Engineer's entry: "Autoland not fitted to this aircraft..."