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Glossary:No Fault Found

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No Fault Found (NFF) is a reported failure that cannot be confirmed, recognized or localized during diagnosis and therefore cannot be repaired.


Alternative terms include: No Trouble Found (NTF), Cannot Duplicate (CND) and Retest OK (RTOK).

Source: "Harrier No Fault Found Reduction", S. Roke (2009), MSc Dissertation in Engineering Business Management, Faculty of Engineering and Computing, Coventry University.

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