States have access to the ADREP system, which is operated and maintained by ICAO. This interactive database collects occurrence data (accident / incident), and provides users with the ability to exchange safety information. 

ICAO requirements for incident reporting and reporting occurrences.

Immediately reportable matters are documented in the Transportation Safety Investigation (TSI) Regulations 2003. This information allows investigators the opportunity to preserve evidence, and to act quickly to identify the underlying factors that led to an occurrence. 

In Singapore, mandatory occurrence reporting is guided by several Air Navigation Orders and guidance materials. Sample reportable occurrences are aircraft equipment malfunctions, procedural violations, or an incident that occurs during the course of training. Reporting and analyzing this information allows CAAS to employ a forward-looking approach to the identification of safety needs.