|Quoting murf (Reply 147):|
Moog will be supplying FBW for Embraer's E2's cause of this.
|Quoting YxwatcherMKE (Reply 182):|
It was my understanding that Flight Testing is done in the 1500 to 1700 hours in the air. Does the C-Series require more hours for some reason other than what you feel is needed?
The issue is Bombardier cannot receive credit for certain flight testing hours until the FBW software is proven safe in the testing labs prior to that flight test.
It isn't just flight hours, it is proving system functions in the air. If the software isn't ready to test a function, a flight test might be performed but certain artifacts wouldn't be collected, so that it means the flight test must be repeated at a future date to close out all the artifacts. Or... the flight test cannot be performed until the software is ready.
Flight testing is so much more than it used to be. e.g., the NEO's flight test program will be *more* complicated than the original A320 flight test program due to the greater understanding the regulatory agencies now demand. Some of what is now tested in flight test is easily 'proven OK
' in a few years of commercial service, but every certification agency has realized there are a large number of scenarios that weren't flight tested before that do indeed need to be tested.
This is one reason Boeing and Airbus keep around flight test aircraft years after an aircraft enters service. In some cases, if the added flight testing hadn't been conducted, the insurance companies would have raised their rates. It is now at the point were a majority of the flight testing is to satisfy demands other than the regulatory agency. e.g, LH
is responsible for adding *hundreds* of flight test scenarios for Boeing, Airbus, and Bombardier. Why? They feel more confident buying an aircraft that has undergone certain flight tests. If they are a launch customer (as they are with the C-series), those test scenarios are part of the purchase contract. JAL, UA
, and a few others are known to do this too. (But AFAIK, LH
is the most strict.) But this isn't a bad thing. Both Boeing and Airbus have learned many of these airline scenarios 'add value' and thus have consolidated the testing to be extremely economical which cuts the added hours of flight testing dramatically.
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