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by stevehawk 1102 days ago
Yes there is. It's called the FAA, and they /hate/ change.
1 comments

With, to be fair, is a mostly sane attitude in this space.

When they DON'T move at glacial pace you get the 737 MAX.

> When they DON'T move at glacial pace you get the 737 MAX.

I’d argue the existence of the 737 MAX was a response to the FAA moving at a glacial pace, if you want to look at root causes.

The 737 MAX exists because Boeing was getting their butts handed to them in the market by the Airbus A320 Neo due to its superior fuel efficiency.

Boeing engineers wanted to create a new clean sheet single aisle aircraft to replace the 50 year old 737 (+737 NG) design. However, Boeing management decided that it would take too long to design + get it past the FAA , so they pivoted to another 737 upgrade. Another factor in this decision was that upgrading the 737 would allow the airlines to transfer their pilots over with minimal training.

However, to keep the same "type" as a 737, Boeing had to keep the planes dynamics exactly the same as the previous model.

Simultaneously, Boeing went on a full on lobbying blitz to get the FAA to allow them to “self certify” aspects of the design. Boeing had a legitimate argument here, the ESEA had streamlined the type variant process years ago allowing Airbus to quickly iterate on their existing designs.

So congress/FAA finally relents and allows Boeing to bring stuff in house. However, in retrospect, this was done without the collaboration and checks that the ESEA and Airbus have implemented, ensuring that the process generates the correct results.

If the FAA I’ve been quicker to read the tea leaves and implement a collaborative model, I’d like to think that flies in the 737 MAX would’ve been caught.

A big part of why Airbus can get away with it because of their control model. It's total fly by wire, so a given input will result in the exact same roll/pitch rate, vs on a Boeing where the inputs map to control deflections. So Airbus gets "flies the same" for free.
Of course Air France 447 shows how the aggressive auto pilot pilot training methodology leads to a different failure mode
Do you have more info about this? Sounds like a interesting design decision (I'm not a aeronautical engineer).
https://en.wikipedia.org/wiki/Flight_control_modes#Flight_mo...

If you read all the way down to "Direct Law", which is the most degraded of all the FBW modes, that's how a Boeing normally works.

The Airbus system really makes life quite easy in a lot of ways... the aircraft will fly the exact same at maximum and minimum weights, etc.

ESEA? Do you mean EASA?
Don’t give Boeing any leeway to excuse this, it wasn’t then innovating and the FAA moving fast:

> “Boeing has agreed to pay $2.5bn (£1.8bn) to settle US criminal charges that it hid information from safety officials about the design of its 737 Max planes. The US Justice Department said the firm chose "profit over candour"

https://www.bbc.co.uk/news/business-55582496

My hypothesis about the 737 MAX is because the FAA advanced its safety standards so much that it made sense to keep building older designs at a lower cost, which are for some reason grandfathered.

Carmakers can’t mass produce older designs meeting older standards without airbags using “the design was approved in the past” excuse, but that’s totally cool in aviation.