Aircraft on ground (AOG) – concerns aviation maintenance. AOG logistics comes under the umbrella of ‘emergency logistics’, and is the delivery of essential parts which are needed in order to get the aircraft in the air again. Grounded aircraft usually require repairs and maintenance, thus the need for additional parts. Aircraft on Ground logistics are crucial to prevent flight cancellations or delays which would damage reputation, revenue and trust in an aircraft company’s ability to deliver a regular, reliable service.