CREATE TABLE table_25614 ("date  ( dd.mm.yyyy ) " TEXT, "Tail number" TEXT, "Location" TEXT, "Fatalities" TEXT, "Brief description" TEXT)

What's the tail number of the airplane involved in the accident described as crashed?
SELECT "Tail number" FROM table_25614 WHERE "Brief description" = 'Crashed'
SELECT "Tail number" FROM "table_25614" WHERE "Brief description" = 'Crashed'