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- Class A – For scenarios where published ICA is not available to manage a new or emerging field issue that is detectable by diagnostics data. The CNR can provide maintenance recommendations supplementary to ICA until the published ICA is issued or updated to address the issue. This will be restricted to a small subset of all CNRs. If the Class A CNR signals are confirmed by the operator, findings will be reported to the certifying agency(s).
- Class B -– General health and diagnostics monitoring recommendations that refer to an existing ICA, similar to current CNRs. The majority of all CNRs will be Class B
