The airline plans to purchase 41 more Boeing 737-8 Max planes
“Once bitten, twice shy,” doesn’t really apply to Africa’s biggest carrier, Ethiopian Airlines. Amid this year’s Dubai Air Show, the company has announced that it has ordered 20 planes of the Boeing 737-8 Max—the same model that killed 157 people six minutes after taking off from Ethiopia’s capital Addis Ababa in March 2019.
Five months earlier, a similar plane—the Lion Air 737 Max—crashed in Indonesia’s Java Sea, causing 189 instant fatalities. In both cases, investigators determined sensor malfunctions to be the cause.
Boeing admitted full responsibility for the malfunctions. The accidents led to the grounding of 737 Max models for two years; flights were resumed in June 2021.
Why is Ethiopian Airlines buying 737-8 Max planes?
Most airlines have since avoided purchasing the aircraft, with only 30 out of the world’s 5,000 airlines flying it. But Ethiopian Airlines thinks adding the model to its fleet makes business sense—despite travelers citing fears of flying in the 737 Max since the 2019 accident. “We have renewed our confidence in that aircraft,” CEO Mesfin Tasew told the press in Dubai. “We believe we have checked and confirmed that the design defect of that aircraft has been fully corrected by Boeing.”
Tasew also said Ethiopian Airlines would purchase 21 more 737 Max planes in the near future. It demonstrates, he added in a press release, the company’s commitment “to serve passengers with the latest technologically advanced airplanes.” The airline said in the release it is purchasing the model because it “reduces fuel use and emissions by 20%” while minimizing noise by 50% compared to the planes it will replace.” But returning to the plane hasn’t been without controversy for Ethiopian Airlines in the past, particularly among families of crash victims.
read more: https://qz.com/ethiopian-airlines-boeing-737-max-faa-fatal-accident-1851028514
There wasn’t even a huge issue to begin with. There was a clunky checklist and pilots didn’t get any specific training on it but I would be comfortable flying in an unmodified one with any major US or EU carrier. The planes that crashed were safely recoverable, the pilots just made ongoing mistakes for a very long time in both situations.
No that isn’t the whole story. You’ve presented just a small sliver of the overall problem with the Max.
The Max uses a new type of engine which is too large to fit underneath the wing as it did with older models. To make it fit, Boeing had to mount it just forward of the wing which significantly changes the center of gravity and thrust for the plane.
This changed the flight characteristics of the plane and Boeing engineers put controls and system over-rides in place to adjust for these differences. Unfortunately the system they put in place did not have enough backups for these new flight control systems nor did they make pilots aware of the changes or the overrides for them if something went wrong. Boeing also hid these changes from the FAA because if they had known about them it would have required a much more intensive certification process for pilots to switch from older 737s to the new Max.
I have greatly simplified the story here but as with all major disasters there were a string of failures that causes this crash. At every step of the way this disaster could have been avoided but Boeing consciously made decisions that weren’t in the interests of good engineering or public safety. In the end they paid for it financially, unfortunately the major decision makers have avoided criminal culpability.
I highly recommend that anyone who is interested in this story just do a search on YouTube to educate themselves on the Boeing Max disaster. There are great documentaries on this subject that are fascinating to watch.
OK, I finally got some time with my laptop to actually type this out. Also, I can’t get line breaks to work so I’m splitting paragraphs with hard lines for readability.
The bottom line is that most info on the 737 Max is from news sources that make money off of controversy or parties with an agenda.
Re-engining existing designs is not new and this isn’t unique to the 737-Max. The 737-100 was an old school low bypass engine that was much smaller in diameter than modern high bypass engines. When they wanted to go with more modern engines with the 737-300 they ran into the issue of the wing being too low for the wider engines and they moved it in front of the wing and up to get required ground clearance, this is also what gave the 737 the signature lopsided engine look since they put all the accessories on the sides to maximize ground clearance. For the 737-Max they were fitting even larger engines than before so they use the tried and true “move it forward and lift it technique” that had worked for decades. This did affect center of gravity and thrust (and also lift, Mean Aerodynamic Chord or MAC is equally if not more important here) and as a result introduced some pitch tendencies to power changes.
Handling characteristics are nothing to to planes, airliners, Boeing or the 737; they’re a fact of life. Wanting similar planes to handle similarly isn’t “gaming the system” or cheating, it is a desirable outcome. With fly by wire systems, handling characteristics are tunable, the same as any modern car with stability control. Teaching the system to overcome the difference in center of thrust vs MAC isn’t scandalous or evil, it’s just basic aircraft design in modern times. Also, when the FAA asks how it handles, telling them “we added software fixes to the flight controls that make it mirror previous generations, independent test pilots all agree it is comparable” is a valid answer.
Now I will break and say this is where I do disagree with some of the choices Boeing made. I am not a Boeing fanboy and despite flying a Boeing (albeit one that became a “Boeing” when they bought McDonnell Douglas). I think their shift from having engineers in charge at the executive level to bean counters from GE/3M they made decisions that have degraded the quality of their product. This doesn’t mean they aren’t safe and functional aircraft, it’s like when I bitch about Subaru putting the oil filter inside the “ring of fire” circle of hot exhaust manifold or placing the fuel filter inside the fuel tank. My main issue with the 737-Max and MCAS is the way the fly by wire corrected for the handling by using pitch trim, but I’ll explain that next.
As I said Boeing didn’t lie or hide anything, they simply did the minimum required and the FAA didn’t ask for any more when given a simple answer. The plane passed all tests and, per all the test pilots, flew the way they said it would. The issue is what happened if anything went wrong with the way that they made it fly the way they said it would. For any large aircraft, pitch trim is a big deal. Leaving the elevator deflected at cruise creates tremendous drag so instead the entire rear stabilizer moves. This is far more aerodynamic but creates a danger because the moving surface is so large that if it does go outside of the normal range, the plane becomes unflyable. Because of this, every single pilot of large planes is taught to be aware of unintended stabilizer motion. Now going back to what I was saying before, the way MCAS worked is that it was basic computer code saying “if power makes nose go up, move tail until nose goes down.” It works and all, but inducing continuous stabilizer motion just seems sloppy to me as both a pilot and a computer science degree holder. I am not an aerospace engineer though, so I’m guessing there is more to it such as elevator not having enough authority to counter it the way the stabilizer does and odds are there is a reason they picked this, I just don’t personally like it because as a pilot “stabilizer motion” scares me more than “stall, stall, stall” when the jet yells at me.
This brings me to my final point and back to what I was originally saying. Even if MCAS was a subjectively sloppy execution of a system, it should not have ever led to a fatal mishap. If a car company has a system that under very rare, unknown and specific circumstances can deflate a tire over the course of 20 highway miles or so, is it their problem for not predicting this and informing the NTSB prior to selling it to the public despite meeting all requirements and passing all tests for certification? While yes, it’s an issue and yes, the cars can be made safer once it is known, if you have 15 miles to pull over after your TPMS light comes on would you expect someone that is unaware of this car feature/flaw to keep driving for another 10 minutes, with the TPMS light on, without ever pulling over and checking their tires? That is what happened in both 737-Max crashes. No, pilots were not given specific training on MCAS, but they were absolutely trained on what to do for stabilizer motion. The fact that they had uncommanded stabilizer motion and never ran the appropriate checklists is absurdly damning of them. A huge part of pilot training for type ratings is learning how to triage situations and pick the correct checklist to run; “stabilizer motion” is virtually always the first one. Seriously, if I have an engine on fire and stabilizer motion, I’m disabling the trim before I shut down the engine, it can burn clean off the pylon for all I care, the plane can fly just fine on the remaining engines. It’s also worth saying that during mishap investigation training “blaming the pilots” is the easiest answer that is discouraged in virtually all situations. It’s never “he flipped the wrong switch” but “his training made him mistake this switch for another” or something else. Human error is the easiest scapegoat in any mishap while human factors is what can actually be changed to prevent the next one. Mishap investigation is about prevention, not blame. This is why the second crash is unforgivable. The first crew were in a bad situation beyond their skills and paid the ultimate price for it. The second crew had every resource not just available, but shoved down their throats by the entire world for weeks and still didn’t bother to even brush up on the checklist for a runaway stabilizer. Sometimes, human error is beyond human factors and this is the epitome of it.
All that aside, once there was blood in the water the sharks were sure to circle and that is how the documentaries, exposés and hit pieces on Boeing progressed on the natural cycle. There is always more to the story, but sometimes the full answer is closer to the simple answer than the long answer.
The 737 Max is the only plane that Boeing has ever made that the guys at the Boeing factory refuse to fly on. These are guys with “if it ain’t Boeing I ain’t going” bumper stickers. Unless it’s the one.
I know the entire story. I’m also a pilot who has flown Boeing aircraft, a trained aviation mishap investigator and flight safety officer. It was a slightly sloppy job done by Boeing consistent with FAA guidelines and oversight. It could have been done better but it was absolutely sufficient for standard ops. The only issue was when substandardly/proficient pilots had an issue. The jets were flyable and recoverable.
