423.What are the type A DEUs connected to ?

　To the top line data bus.

　To the mid line data bus.

　To an ARINC 429 data link.

正确答案：A

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238.When is the LAST LEG REPORT transfered to the PREVIOUS LEGS REPORT ?

237.Which Centralized Fault Display System functions are available in BACKUP mode on ground ?

236.When you make a print of the PREVIOUS LEGS REPORT

235.Which Centralized Fault Display System functions are available in flight ?

234.In flight, a class 2 failure has occurred. Now, we are on ground. Where is this failure displayed ?

233.When does a class 3 failure have to be corrected ?

232.Which action must be take by maintenance personnel when a class 1 failure affects an aircraft system ?

231.The POST FLIGHT REPORT is made up from:

230.The clock provides UTC to :

229.What happens if FWC1 FAILS?