Implications of Errors (i.e. Accidents)

In the worst cases, human errors in aviation maintenance can and do cause aircraft
accidents.  accidents are the observable manifestations of error. Like an iceberg which has most of its mass beneath the water line, the majority of errors do not result in actual accidents.
“Iceberg Model” of Accidents

 Some incidents are more high profile than others, such as errors causing significant in-flight events that, fortuitously, or because of the skills of the pilot, did not become accidents. Other incidents are more mundane and do not become serious because of defences built into the maintenance system. However, all incidents are significant to the aircraft
maintenance industry, as they may warn of a potential future accident should the
error occur in different circumstances. As a consequence, all maintenance incidents
have to be reported to  Mandatory Occurrence Reporting. These data are used to disclose trends and, where
necessary, implement action to reduce the likelihood or criticality of further errors.
Voluntary Reporting System

 Notification of Incidents and Investigation thereof. 

 Mandatory Occurrence Reporting Scheme (MORS)

  Confidential Human Factors Incident Reporting Programme (CHIRP) scheme provides an alternative reporting mechanism for individuals who want to report safety concerns and incidents confidentially.

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