Old 01-10-2020, 06:05 AM
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Excargodog
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Default I’m starting to doubt viability of the MAX

Not the engineering. The MAX is hardly the first aircraft that has problems with aerodynamic stability in certain phases of flight. I’m aware if at least one aircraft that is totally unflyable if it loses its electronic stability augmentation system. SAS’s can be made robust and redundant.

Boeing didn’t HAVE to link it to a single AOA sensor and I’m pretty sure that the decision to avoid doing as much as possible to avoid the regulatory hoops of getting FAA approval on a novel system and perhaps even requiring the aircraft to be typed and trained differently than the ‘classic’ 737 was viewed as far more of an obstacle than the technical one of building a good robust and redundant SAS to handle the changes in CG and thrust vector fir the new engines and their placement, and maybe that ought to cause a little soul searching at FAA headquarters as well as Boeing.

Like everyone else, I initially believed the 737 MAX, with hundreds already bought and thousands of orders was too big to fail. Technical fixes would be done, additional training would be provided, the aircraft would eventually have the sort of SAS, MCAS, or whatever you want to call it, that it=should have had to begin with, and life would go on and the MAX woukd go on to be a commercial success. But I’ve begun to wonder if that’s really the case.

This has gone on too damn long. Too many people have been demagoguing this, using it as a vehicle to flog Boeing and to flog the FAA, or to demonstrate the virtue of their country’s certification system over that of the US’s certification system either due to honest concern, national pride, or to screw over a competing manufacturer to their own,...perhaps all three.

And it’s taken it’s toll. Lots of people, naive people who don’t even really understand the issues involved, are declaring they will never fly in a MAX, or let their family fly in one. Airline pilot and flight attendant unions have voiced their own strong concerns about when/how/if it can be safely returned to service. More recently a treasure trove of company emails have been released with scurrilous comments about it’s design and certification process. A representative sample being put out worldwide by the BBC:

...
One unnamed employee wrote in an exchange of instant messages in April 2017: "This airplane is designed by clowns who in turn are supervised by monkeys."
The documents, which have been published by the Washington Post, appear to show that Boeing rejected pilots being trained on simulators, which would have led to higher costs for its customers, making its aircraft less attractive.
"I want to stress the importance of holding firm that there will not be any type of simulator training required to transition from NG to Max," Boeing's 737 chief technical pilot at the time, Mark Forkner, said in a March 2017 email.

https://www.bbc.com/news/business-51058929

...

And some of the absolutely idiotic and unprofessional internal documents that have now been released to Congress and hence to the public are only making things worse:

https://www.scribd.com/document/4423...mulator-2-of-3

Legally, these are going to be disastrous for Boeing, but PRwise they may be even worse. While all the problems are amenable to a technical fix, will the aircraft ever be economically viable once it is fixed? Or will so many people just refuse to fly in it, or even to fly it, that it is now doomed? What if it isn’t too big to fail.

I am reminded of the propjet (turboprop) Lockheed Electra airliner in the 1950s. Early in its career as an airliner, two of them were lost because of a resonance problem which allowed a buildup of harmonic vibration between the outboard engine prop and the wing main spar that caused violent up and down motions until eventually a wing woukd break off - in cruise at altitude with loss of the two aircraft and all aboard. The fix - a little stiffening and strengthening to change resonant frequencies was quite effective, and as the P-3 Orion the aircraft continues to fly to this day for the Navy, but the civilian model was blighted in the public opinion. People wouldn’t fly on it. Production Of the airliner version was stopped at 170 aircraft and most of those eventually converted to cargo or military aircraft.

Is this the fate that awaits the MAX?

Last edited by Excargodog; 01-10-2020 at 06:40 AM. Reason: Correcting massive numbers of typos...
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