Airport Ground Support Equipment worked example

GSE Field Service Reserve at 58% covered field service event share: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop covered field service event share to 58%, then walk the calculation through step by step. Estimate field service reserve for airport GSE from expected service events, cost per event, coverage share, and fixed travel or support reserve.

The inputs for this scenario

  • Expected GSE field service events: 85 events (held at the documented default)
  • Cost per field service event: 740 $ / event (held at the documented default)
  • Covered field service event share: 58 % (the input this scenario stresses; the baseline uses 80)
  • Fixed travel and support reserve: 18,000 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Covered field service event cost = expected field service events × cost per event × covered event share.
  • Total field service reserve works out to 54,482 $ service reserve at these inputs, and this is the headline figure for the scenario.
  • Cost per field service event works out to 641 $ / piece at these inputs.
  • Covered field service event cost works out to 36,482 $ at these inputs.
  • Fixed travel and support reserve works out to 18,000 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where covered field service event share sits at 80% and the headline result is 68,320 $ service reserve, this scenario comes in 20.25% below the baseline at 54,482 $ service reserve.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to covered field service event share, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It uses one average cost per event; a single major failure such as a transmission or hydraulic pump replacement can far exceed the average and isn't captured by a count-times-cost model.

Results at a glance

  • Total field service reserve: 54,482 $ service reserve (headline result)
  • Cost per field service event: 641 $ / piece
  • Covered field service event cost: 36,482 $
  • Fixed travel and support reserve: 18,000 $

Run it with your numbers

  • To rerun this with your own numbers, open the live GSE Field Service Reserve calculator, set covered field service event share to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.