What needs to be clarified
Check documentary traceability of the measuring tool and identify which condition records relate to maintenance time and which are supported only by the later check.
Materials to prepare
- Work order and task card with measurements and tool designation
- Tool issue register with individual identifiers and dates
- Earlier and later calibration records, including pre-adjustment data
What to compare
Compare individual identifier, measuring range, issue date and calibration interval. Distinguish pre-adjustment and post-adjustment results; check tool repair records. Do not automatically apply a later pass retrospectively. Assess whether the instrument history permits review of a possible deviation's effect on the recorded measurement.
Possible outcome of the analysis
A table may link measurements, tools and calibration records, identifying unsupported periods and questions about whether particular maintenance results require reconsideration.
Limits of the conclusions
Document review does not confirm airworthiness or authorize operation. Without tool identification and history, an assumed calculation cannot establish the actual error of an earlier measurement.