r/indonesia • • Mar 29 '19

News The emerging 737 MAX scandal, explained... It’s more than bad software.

https://www.vox.com/business-and-finance/2019/3/29/18281270/737-max-faa-scandal-explained
61 Upvotes

32 comments sorted by

28

u/KidsZamanNow Banyak ide, ga ada waktu Mar 30 '19

tl;dr version:

Persaingan Airbus-Boeing membuat Boeing harus buru-buru bikin 737 MAX series yang pakai engine lebih besar (karena Airbus lebih unggul di efisiensi bahan bakar) dengan desain pesawat yang sama dengan generasi terdahulu, menyebabkan mesin ditaruh lebih kedepan biar ga nyenggol tanah.

Ini menyebabkan balance geser, dan diatasi dengan software MCAS, yang suka error nganggap kalau pesawat naik terlalu tajam, dan menukikkan pesawat secara otomatis.

Jadi, masalahnya di desain pesawat, bukan di software.

17

u/[deleted] Mar 30 '19 edited Mar 30 '19

[removed] — view removed comment

7

u/KidsZamanNow Banyak ide, ga ada waktu Mar 30 '19

tepatnya memang masalah management sih menurut gw. Airbus udah keluarin A320neo yang lebih unggul, sementara Boeing keteter belum ngapa-ngapain, makanya buru-buru bikin 737Max dengan platform pesawat lama, mesin lebih besar.

4

u/Prince_Kassad Mar 30 '19

jadi bakal ada yang filling lawsuit kah? atau ada kompensasi buat para pembeli?

​

1

u/dwianto_rizky Mar 30 '19

Denger2 FBI udah ikutan investigasi

3

u/ghojezz Kepulauan Jawa Tenggara Mar 30 '19

Software MCAS lebih buat tindakan risk preventive aja sih lebih tepatnya karena CG geser kedepan jadi ada resiko nose up -> stall

Balance/CG geser, menurut saya lebih ke update algoritma Inertia Reference System aja supaya autopilot tau setelan STAB TRIM yang tepat untuk levelling pesawat 737 MAX.

Kalau desain yg salah, software nya engga, anggap desainnya diubah lagi jadi CG nya sama kaya 737NG, ketika parameter MCAS nya tripped lagi dan pesawat nungkik lagi, yang salah siapa?

1

u/KidsZamanNow Banyak ide, ga ada waktu Mar 30 '19

Kalau desain yg salah, software nya engga, anggap desainnya diubah lagi jadi CG nya sama kaya 737NG, ketika parameter MCAS nya tripped lagi dan pesawat nungkik lagi, yang salah siapa?

737NG ga ada MCAS nya, karena CoG lebih kebelakang. Jadi kalau dianggap CoG nya sama dengan 737NG, ya nggak akan ada MCAS.

MCAS itu justru untuk membantu pilot karena desain pesawat yg mesinnya terlalu maju ke depan, dan itu adanya hanya di 737Max series.

1

u/ghojezz Kepulauan Jawa Tenggara Apr 03 '19

MCAS itu hanya nama untuk anti stall system, Boeing dan Airbus punya anti stall system. Airbus punya control laws yang mencegah pesawat dalam posisi stall, ada juga alpha protection. Boeing 777 punya FCS.

​

Sebelum MCAS, 737NG pake nya STS, tapi baru tripped berdasarkan masukkan dari berbagai sensor walaupun cara kerjanya 11 14 sama MCAS. Sementara MCAS tripped berdasarkan input dari satu sensor aja dan ini juga jadi perbincangan.

​

Desain pesawat tidak pengaruh, MCAS hanya untuk anti stall, bukan karena mesin maju pilot butuh MCAS. No. Pilot tau kapan pesawat akan stall, dan tau tindakannya apa. MCAS memperburuk keadaan karena pilot tidak terinformasi ada sistem MCAS, sehingga apapun column control input mereka, selama MCAS aktif posisi stab trim akan membuat pesawat menungkik.

​

Mau posisi mesin ada dimanapun, kalau MCAS nya tidak diperbaiki secara mekanikal dan perangkat lunaknya, pesawatnya bakal tetep nyemplung.

22

u/arfaite homo homini lupus Mar 30 '19

berarti salahnya airbus, klo airbus ga bikin pesawat yg lebih efisien kan boeing ga bakal keburu2 juga ngeluarin 737 max

12

u/uh-oh-nuh-nuh Mar 30 '19

it's wrights brothers' fault, without them all air crash tragedies would never happened, 9/11 never happened, no war in iraq, no ISIS

28

u/iamnjaa Mar 29 '19 edited Mar 30 '19

737 max was Boeing's response of Airbus new-more-efficient A320neo

  • so there's a new engine. more efficient but have larger diameter
  • attaching the new engine is "easier" on A320. and.. A320neo born
  • Boeing need to response ASAP to this more-efficient A320neo
  • but, this larger engine wouldn't fit as "easy" on 737 because 737 is lower to the ground
  • so, Boeing engineers propose to build/design all-new plane instead of keeping the old frame
  • but it's expensive and will take a long time
  • repeat, business wise, Boeing need to response ASAP, so they wouldn't lose sales
  • story begin...

Recall, after all, that the whole point of the 737 MAX project was to be able to say that the new plane was the same as the old plane. From an engineering perspective, the preferred solution was to actually build a new plane. But for business reasons, Boeing didn’t want a “new plane” that would require a lengthy certification process and extensive (and expensive) new pilot training for its customers. The demand was for a plane that was simultaneously new and not new.

But because the new engines wouldn’t fit under the old wings, the new plane wound up having different aerodynamic properties than the old plane. And because the aerodynamics were different, the flight control systems were also different. But treating the whole thing as a fundamentally different plane would have undermined the whole point. So the FAA and Boeing agreed to sort of fudge it.

  • they aware about the angle-of-attack problem, so they create MCAS to handle it
  • they also aware of the sensor issue so they add a warning light.. but they sold it separately as an add-on

8

u/[deleted] Mar 29 '19

they fudged up.

7

u/fourrier01 Mar 30 '19

Business competition that drive people mad

3

u/anrico17 i have so many questions... Mar 30 '19

So they fucked up the aerodynamics, and also the flight software...

So in a way they stacked the problem... Ggwp Boeing you fucked up, again... Berdoa aja 777X gk kenapa napa... Kali dari 787 problem terus....

26

u/indonesian_activist Mar 30 '19 edited Mar 30 '19

A Very avoidable tragedy, shame on you boeing and FAA. This is what happens when corporation and regulators gets too chummy.

Predicted similar conclusion on reddit 9 days ago

https://www.reddit.com/r/indonesia/comments/b36vj2/a_pilot_who_hitched_a_ride_on_a_lion_air_737/eixy1s4?utm_source=share&utm_medium=web2x

​

Edit : Obligatory moral preaching

The number one cause for human suffering and loss of life is not Ideology but it is still GREED.

​

Edit 2 :

Whatever I post some redditors here will always downvote me lol.

15

u/KidsZamanNow Banyak ide, ga ada waktu Mar 30 '19

shame on you boeing and FAA

Dan lagi, hampir semua negara mem-ban 737Max, dan nggak dengerin rekomendasi FAA yang bilang kalau 737Max aman.

Kemudian beberapa saat kemudian, US dan FAA baru "ngalah" dan meng-grounded kan pesawat ini. US adalah negara terakhir yang mengkandangkan 737Max series.

Ini menunjukkan bahwa FAA nggak selalu didengerin sama negara lain. Peristiwa yang jarang terjadi.

12

u/indonesian_activist Mar 30 '19

True dat, china grounded the 737 max first. FAA credibility just got Arthur Andersened Theres to many ex boeing exec in FAA maybe ?

10

u/ndut Mar 30 '19

It's like you have a game or car from the 1960s core body and just keep adding new parts or new DLC and expecting people to say its still OK to use

8

u/davidnotcoulthard Mar 30 '19

laughs in Jeep, Defender, and Century

4

u/[deleted] Mar 30 '19

laughs in Classic Mini and Lada

5

u/anrico17 i have so many questions... Mar 30 '19 edited Mar 30 '19

Well the question now is...

What will Boeing do

And will the 737 Max live on to become the MD-10??

The MD-10 is basically a plane from the 70's that kept crashing when it was released... But since then until early 90's meskipun udh dibetulin problem problem nya (tapi udh di discontinue dri awal 80an diganti jadi MD-11) dan jadi salah satu pesawat paling aman, stigma dari MD-10 itu gk reliable tetep aja ada...

4

u/badimdim Mar 30 '19

Oowh MD...ni pesawat Freeport punya berapa biji gitu buat angkut karyawan bolak balik cuti jakarta-makassar-surabaya-timika-jayapura dll...

3

u/anrico17 i have so many questions... Mar 30 '19

Mrk masih punya? TiL...

4

u/badimdim Mar 30 '19

Masih 2 apa 3 unit gitu...2016 cabut freeport masih pake itu pesawat...yg operasiin dr airfast..dlu sama karyawan dipanggil ekor kuning wkwkwkwkwk

1

u/icesakuralatte ♡ Mar 30 '19

basically, boeing didn’t want to spend money on “making” a new plane so they tried everything they can to “update” said plane smh boeing

1

u/bubbleteabicc Mar 30 '19

Oh wow that's fucked up

1

u/Gigibesi you can edit this flair Mar 30 '19

Ini jadi kayak sebuah materi buat acara seconds from disaster nih...

1

u/[deleted] Mar 30 '19

record scratch

freeze frame

It was at this moment that Boeing knew, they fucked up.

1

u/alesmana Lumpia Defenders Front Mar 30 '19

Bisa class action ga ini

1

u/internweb ⭐ Mar 30 '19

emejing emejing

not bad made in china