from a repair viewpoint, the issue might be that anything with a US involvement (so fitting a replacement LEAP engine for example) very likely would need to be referred to OFAC for approval. Those referrals can take up to a year. There is therefore a potential risk that the aircraft could need to sit there pending approval from OFAC to the supply and fitting of an engine. Fingers crossed for NAS they have a spare engine and can ship it using a local cargo carrier and undertake the engine or component change either themselves or not involving a business involved in the USA.