MNT.3:1 - Problem frame

Use this pattern when a fault code, alarm or repair history leaves the mechanism or consequence needed for a maintenance decision unclear. “Bearing failure” may describe an observed damaged part without explaining whether lubrication, alignment, contamination or another condition changes the next policy or intervention.

Establish a qualified failure account for the receiving question. The result connects observed departures from required function with the causes and consequences that current evidence supports. MNT.4 interprets a current measurement or trend; MNT.6 uses a failure account to choose the present response. A complete root-cause inquiry is unnecessary when remaining explanations lead to the same adequate answer.