Start with the fan register and the handwritten checks at each junction. It is the source used to make a decision about whether the new fan can support an added working face without weakening the old return route; it is not the decision itself. The rule only works if the source describes the conditions at the South Ventilation Line beside the old ore pass.
The latest count is 59 air checks entered per shift; the prior file listed 60. The clerk has matched the claim to its source register and named the missing record. The difference is a signal to check, not a verdict about who is right.
The disputed point is practical: The mill’s output plan assumes the new fan runs at full power; mechanics note that the return door still sticks on cold starts. One side relies on the posted total, while the other points to a canvas test strip that catches the draft at the last occupied junction.
The risk of reading the file too broadly is that an entry becomes a conclusion. Dara Vek checked the fan register and the handwritten checks at each junction against the field notes. The method is to start at the shift handoff, where an official total can lose its context; it confirms the entries, but not every interpretation attached to them.
Next: A loaded test will be repeated with the return door fitted to its replacement hinge. A useful update will publish the method, exceptions and review date with the number.
