It seems AOG Technics operated by falsifying part manifests using the names of accredited suppliers: https://fortune.com/2023/09/22/why-so-many-flights-canceled

It seems AOG Technics operated by falsifying part manifests using the names of accredited suppliers: https://fortune.com/2023/09/22/why-so-many-flights-canceled-delayed-aog-technics-fake-parts-american-airlines/ https://fortune.com/2023/09/22/why-so-many-flights-canceled-... CFM, the engine manufacturer, became aware of the issues in June when a Portuguese repair shop alerted it to the existence of allegedly forged documents bearing its name So presumably, all (?) they had to do was trace the paperwork from all parts supplied through AOG Technics, and contact the suppliers in those documents to verify the documents/parts were real.