What you have, isn't efficient even for spreadsheet. It is more like some paper table from somewhere 19. century.
In properly designed Excel workbook, you'd have separate tables which define uniquely all your aircrafts, units, and categories/categorie causes - with some ID column in each of them, and probably a table where are listed all units for every aircaraft (with columns for aircraft and unit ID's) and full info about those units (like category causes, in/out dates, authorites, etc.). Plus some report sheet(s), where user sets report conditions, and matching report table is calculated.
You must avoid entering any detailed information repeatedly whenever this is possible (and in Excel it is possible too)!