[Jeroen]

Originally Posted by arijitkanrar

Thanks for this.
I guess since MCAS has less authority now, it means pilots have to be trained to handle the MAX behavior at high AoA scenarios and recover manually if needed?

As far as I understand all pilot need formal simulator training to handle a number of scenario’s including high AoA. MCAS was never intended to recover from a high AoA. MCAS primarily function was to ensure the force on the Yoke (i.e. how the pilots feels it) adhered to FAA requirement. Only when it went wonky started it interfering with the very sad results as know.

Originally Posted by arijitkanrar

Interesting to read about the third AoA sensor which calculates AoA synthetically.
Wonder how they do it?
I'm thinking it measures air pressure changes at two vertically separate pitot tubes and calculates the AoA using the phase shift between the signals from each pitot tube.

I don’t know the details on the implementation on the Max. But so called synthetic air data system has been around for a while. Implemented in the Boeing 787 from the beginning. Some people criticised Boeing for not adopting it in the MAX from the beginning. I am not sure why they did not. Cost must have been an issue, but it might also have an impact on training requirements.

A synthetic air data system relies on completely different sources from the normal (mechanical) air data system. So it does not rely on pitot tubes at all.

it uses the inertial reference system, GPS and a few others and has a very elobarote way of calculating air speed, AoA and a few others. so there is no third vane at all. All calculated!

Wikipedia explains the basics:

https://en.wikipedia.org/wiki/Synthetic_air_data_system

Jeroen

[Jeroen]

It never stops! Grounded again, at least some


https://www.cnn.com/2021/04/09/busin...lem/index.html

[TrackDay]

It seems like the 737 max wont be entering Indian airspace any time soon. FlyDubai's 737 max have been denied permission for using the model into India or over Indian Airspace.


Source:
https://timesofindia.indiatimes.com/...w/81969703.cms

https://www.news18.com/news/auto/dgc...a-3622943.html

[airbus]

Originally Posted by TrackDay

It seems like the 737 max wont be entering Indian airspace any time soon. FlyDubai's 737 max have been denied permission for using the model into India or over Indian Airspace.

Ban on Boeing 737 Max aircraft is partially lifted by the DGCA.

Boeing 737 MAX 8s can overfly India: DGCA

Aviation safety watchdog Directorate General of Civil Aviation (DGCA) on Tuesday allowed Boeing 737 MAX 8s to overfly India in a move that will enable foreign carriers to operate the aircraft.

The aircraft continues to be banned for commercial operations in the country since its involvement in two air crashes more than two years back. However, several airlines in the past few months have resumed operating the aircraft following clearances by European and U.S. regulatory bodies upon modifications.

The regulator on Tuesday modified its ban on Boeing 737 MAX 8 to exempt “foreign registered Boeing 737 Max aircraft, for overflying the Indian airspace provided that the aircraft has been permitted by the regulatory authority of the State of Registry of the said aircraft for conduct of such operations and subject to obtaining permission from DGCA.”

The DGCA has also permitted 737 MAXs grounded in the country and belonging to foreign lessors to be flown out.

[Nexusios1521]

Fresh FAA concerns set to delay grounded 737 MAX’s return to service.

Hot on the heels of the Federal Aviation Administration (FAA) issuing an Airworthiness Directive concerning potential corrosion affecting Boeing’s 737 MAX engines, Boeing is also being asked to provide proof multiple subsystems on the aircraft would not be affected by the electrical grounding issues that have seen nearly 25% of the worldwide 737 MAX fleet grounded.

Previously, the FAA has said “subsequent analysis and testing” showed the issue could involve additional systems. Systems flagged include the standby power control unit, a circuit breaker panel, and the main instrument panel.

Now, according to Reuters who cite two sources “familiar with the matter,” US safety regulators want additional documentation and analysis to show the grounding problem originally flagged by Boeing is not affecting other systems on the aircraft.

Meanwhile, the FAA issued an Airworthiness Directive on Tuesday concerning possible corrosion in some Boeing 737 MAX CFM LEAP-1B engines. The corrosion may have occurred as a consequence of long-term storage.

Source: https://simpleflying.com/boeing-737-...nding-delayed/

[airbus]

Lion Air Flight 610 was dramatized by the TV series Air Crash Investigation / Mayday titled as "Grounded: Boeing Max 8" (Season 21 Episode 4). Towards later part of the episode accident of Ethiopian Airlines Flight 302 was also included.

[SKC-auto]

Originally Posted by airbus

Lion Air Flight 610 was dramatized by the TV series Air Crash Investigation / Mayday titled as "Grounded: Boeing Max 8" (Season 21 Episode 4). Towards later part of the episode accident of Ethiopian Airlines Flight 302 was also included.

Where can I watch, are they available on any OTT platform? not using DTH.

[ads11]

https://www.youtube.com/watch?v=Ivn9_4jZZ9k&pp=sAQA

Was watching this video about the latest setbacks for Boeing on another of their high profile product lines, the 787. Couldn't help but be reminded of something I read in one of the long reads posted earlier in the thread about the eroding of the engineering focused culture at Boeing, and how the 777 was the last purely in house product (ergo no big grounding issues that immediately to spring to mind). The 787 was the first of the contractor outsourced Boeing jets and little surprise it was bedevilled with niggles at various stages (though I won't lie, I've always enjoyed flying on one). I mean with their single aisle business line pretty much decimated by the Max fiasco for the immediate future, I wonder how much of a body blow this latest 787 setback is.

[BoneCollector]

Boeing 737 MAX has been granted clearance by the DGCA today.





AIC012_2021.pdf

[Foxbat]

Boeing Co. and lawyers for families of the victims of the 2019 crash of a 737 MAX jetliner struck an agreement that sets the stage to resolve lawsuits brought against the plane maker.

Under the stipulation filed Wednesday in the U.S. District Court for the Northern District of Illinois, Boeing accepted responsibility for the crash, and the representatives for the families agreed not to pursue punitive damages against the plane maker.

Families can still take their claims to trial to seek compensatory damages or can reach settlements with Boeing through mediation.

Boeing agreed that in any trial, the company will “admit that it accepts responsibility for the crash of flight ET302” and state that it “does not blame nor allege that any other person or entity was responsible for Plaintiff’s damages.”


Source: https://www.wsj.com/articles/boeing-...=hp_lista_pos3

[itwasntme]

VT-MXE being readied for flight at BLR/VOBL:

[itwasntme]

Interesting to see that only flydubai is operating them as of now.

[BoneCollector]

SpiceJet B737-MAX 8s have taken the skies. As of now, out of 20, only 2 have started flying, VT-MXG since 21st November and VT-MXH since 19th November.

[RM Motorsports]

This should be interesting for aviation fans.

Downfall: The Case Against Boeing

Investigators reveal how Boeing’s alleged priority of profit over safety could have contributed to two catastrophic crashes within months of each other.

https://www.youtube.com/watch?v=vt-IJkUbAxY

[Hayek]

Originally Posted by RM Motorsports

This should be interesting for aviation fans.

Downfall: The Case Against Boeing

Investigators reveal how Boeing’s alleged priority profit over safety could have contributed to two catastrophic crashes within months of each other.

Just a brilliant documentary, and I found the callousness of the Boeing officials through this process disgusting. At some level, they could perhaps have been forgiven for their “errors of judgment” before the Lion Air crash. But the attitude after the Lion Air crash beggars belief - it probably the most egregious case of corporate behaviour I have seen in my adult life - and I have seen a lot. It just demonstrates how low the value of the lives of people in emerging markets is in that Boeing got away being fined peanuts (USD 2.5 bn) for such blatantly criminal actions. Ideally, several Boeing executives starting with the former CEO and the lead designers of this air craft should be spending the rest of their lives in jail. But it may not happen - because the dead are mainly third world citizens.