Incident. (ICAO Annex 13)
An occurrence, other than an accident, associated with the operation of an aircraft which affects or could affect the safety of operation.
Other occurrence.
Safety occurrences that can not be defined as 'accident', or 'incident'. Usually these cases involve aircraft being damaged (beyond repair) on the ground as a result of hurricanes, typhoons, sabotage, hangar fires etc.
Unfiled occurrence.
Insufficient information is available to determine the exact type of occurrence.
Write-off / hull-loss (Aviation Safety Network).
Airplane damage that is beyond economic repair. Hull loss / write-off also include events in which:
• Airplane is missing
• Search for the wreckage has been terminated without it being located
• Airplane is substantially damaged and inaccessible