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https://www.md80.it/2020/09/01/il-dash-8-400-diventa-il-primo-regional-aircraft-ricertificato-per-soddisfare-i-piu-severi-icao-noise-standards/
Il Dash 8-400 diventa il primo Regional Aircraft ricertificato per soddisfare i piĆ¹ severi ICAO Noise Standards