U.S. Aviation MRO Software Market Size, Share & COVID-19 Impact Analysis, By Solution (Software (ERP Solution, Point Solution, Suite), and Services (Deployment & Integration, Consulting)), By Function (Maintenance Management (Line, Base & Engine Maintenance), Operations Management (Training, Safety & Quality Assurance, Engineering & CAMO), Business Management (Accounts & Finance, Sales & Marketing), & Electronic Flightbag & Logbook Management), By Point of Sale (Subscription & Eigentümer) nach Bereitstellungstyp (On-Premise & Cloud), nach Endgebrauch