AOG Explained: What an Aircraft on the Ground Actually Costs

AOG tells the market that time matters. It does not tell a seller to skip the serial number, and it does not tell a buyer to skip receiving. People who treat the acronym as permission to waive the file are how bad parts move.

Declare AOG only when it is true. Suppliers learn to ignore buyers who mark every request as grounded.

A grounded aircraft can create lost flights, passenger care, crew disruption, substitute lift, extra maintenance labour, and premium freight. Which of those apply depends on the operator, the route, and the duration. Quoting one global “cost per hour” would be fiction.

There is also the cost of a wrong part: a second grounding, a return shipment, and a quality investigation. That cost is why a slightly slower correct unit can be cheaper than a fast undocumented one.

Run the search wide and the acceptance narrow. Collect offers against one written requirement, then let technical and quality apply the same rules they use on a calm day.

Payment still goes to the identified supplier, after the account is checked. Speed is not a control against fraud.

Know the articles that stop your operation, the documents you require, and who can approve a deviation. An AOG at 2 a.m. should use that list, not invent it.

The longer operational guide on this site walks through the sourcing sequence. Use this page for the meaning, and that guide for the response.

A grounded aircraft can create lost flights, passenger care, crew disruption, substitute lift, extra labour, and premium freight. Which of those apply depends on the operator, the route, and the duration. There is no single global cost per hour that this article can honestly print. Quoting one would be fiction.

There is also the cost of a wrong part: a second grounding, a return shipment, and a quality investigation. That is why a slightly slower correct unit can be cheaper than a fast undocumented one. Put that risk next to the premium freight quote before you waive a document.

Declare AOG only when it is true. Suppliers learn to ignore buyers who mark every request as grounded. Use the word when the operation has actually stopped, and then keep the acceptance rules you use on a calm day.

Collect offers against one written requirement, then let technical and quality apply the same rules they use when nobody is waiting. Payment still goes to the identified supplier, after the account is checked. Speed is not a control against fraud.

Know the articles that stop your operation, the documents you require, and who can approve a deviation, before you need the word. An AOG at two in the morning should use that list. The longer sourcing guide on this site walks the response sequence. This page is the meaning. That guide is the method.

If a seller asks you to skip the serial number because the aircraft is down, treat that as a reason to slow down, not a reason to speed up.