AOG (Aircraft on Ground)
AOG means an aircraft is grounded and cannot fly until a part or repair is supplied, making the requirement urgent and commercially sensitive.
An aircraft on ground event occurs when a technical defect, missing component or expired certification prevents an aircraft from returning to service. Every hour of ground time carries direct cost — crew, slots, passenger disruption and, on leased aircraft, contractual exposure.
AOG demand therefore behaves differently from routine demand. Requests are broadcast widely, decisions are made in minutes and the buyer weighs availability and lead time far above unit price.
For a seller, AOG requests are the highest-margin and most time-critical traffic in the aftermarket. Response speed, not price alone, usually decides the win.
RELATED TERMS
An RFQ is a buyer's request for price, availability and lead time on one or more aircraft parts or repair services.
Turn time is the elapsed time between a unit arriving at a repair facility and being released back to the customer.
A serviceable part has been inspected or maintained by an approved organisation and is certified as fit for installation on an aircraft.
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