Last edit by: 24left
Jan 18 2021 TC issues Airworthiness Directive for the 737 MAX
Link to post https://www.flyertalk.com/forum/32976892-post4096.html
Cabin photos
Post 976 https://www.flyertalk.com/forum/29534462-post976.html
Post 1300 https://www.flyertalk.com/forum/29780203-post1300.html
Cabin Layout
Interior Specs can be found here https://www.aircanada.com/ca/en/aco/home/fly/onboard/fleet.html
- Window seats may feel narrower to come as the armrests are placed "into" the "curvature" of the cabin.
- Seats with no windows feel even more narrower as there is no space created by the curvature of window.
- All bulkhead seats have very limited legroom.
- Seats 15A, 16A, 16F, 17A and 17F have limited windows.
- Exit rows 19 and 20 have more legroom than regular preferred seats.
Routes
The 737 MAX is designated to replace the A320-series. Based on announcements and schedule updates, the following specific routes will be operated by the 737 MAX in future:
YYZ-LAX (periodic flights)
YYZ-SNN (new route)
YUL-DUB (new route)
YYZ/YUL-KEF (replacing Rouge A319)
YYT-LHR (replacing Mainline A319)
YHZ-LHR (replacing Mainline B767)
Hawaii Routes YVR/YYC (replacing Rouge B767)
Many domestic trunk routes (YYZ, YVR, YUL, YYC) now operated by 7M8, replacing A320 family
Link to post https://www.flyertalk.com/forum/32976892-post4096.html
Cabin photos
Post 976 https://www.flyertalk.com/forum/29534462-post976.html
Post 1300 https://www.flyertalk.com/forum/29780203-post1300.html
Cabin Layout
Interior Specs can be found here https://www.aircanada.com/ca/en/aco/home/fly/onboard/fleet.html
- Window seats may feel narrower to come as the armrests are placed "into" the "curvature" of the cabin.
- Seats with no windows feel even more narrower as there is no space created by the curvature of window.
- All bulkhead seats have very limited legroom.
- Seats 15A, 16A, 16F, 17A and 17F have limited windows.
- Exit rows 19 and 20 have more legroom than regular preferred seats.
Routes
The 737 MAX is designated to replace the A320-series. Based on announcements and schedule updates, the following specific routes will be operated by the 737 MAX in future:
YYZ-LAX (periodic flights)
YYZ-SNN (new route)
YUL-DUB (new route)
YYZ/YUL-KEF (replacing Rouge A319)
YYT-LHR (replacing Mainline A319)
YHZ-LHR (replacing Mainline B767)
Hawaii Routes YVR/YYC (replacing Rouge B767)
Many domestic trunk routes (YYZ, YVR, YUL, YYC) now operated by 7M8, replacing A320 family
Air Canada Selects Boeing 737 MAX to Renew Mainline Narrowbody Fleet
#2626
Join Date: Dec 2011
Location: YYZ
Programs: AC SEMM / HH Diamond
Posts: 3,161
Two more excerpts:
As of current I assess the probable causes as follows (while keeping my mind open in all directions):
Primary cause of the accident:
- MCAS activation based on a single faulty AoA sensor input without cross check or plausibility check of the incoming AoA value, which caused the stabilizer to reach a position that could no longer be compensated by elevator inputs
Primary contributing factors int the accident:
- A false AoA value, probably produced by the Air Data Reference unit rather than a mechanical fault, which activated the stick shaker and MCAS.
- aircraft systems not adhering to principles of Cockpit Resource Management CRM (MCAS, Stick Shaker, Air Data Reference Unit, AoA, Trim CUTOUT switches)
Possibly contributing factors into the accident:
- Corporate Culture within Boeing in designing aircraft
- Corporate Culture within FAA in certifying aircraft
- Corporate Culture in Ethiopian Airlines, which did not ensure their flight crew were fully aware of the implications of the LionAir Crash and the related EAD as well as Boeing and FAA approved emergency procedures
- Less than optimal crew performance, e.g. loss of situational awareness with respect to speed and thrust
Primary cause of the accident:
- MCAS activation based on a single faulty AoA sensor input without cross check or plausibility check of the incoming AoA value, which caused the stabilizer to reach a position that could no longer be compensated by elevator inputs
Primary contributing factors int the accident:
- A false AoA value, probably produced by the Air Data Reference unit rather than a mechanical fault, which activated the stick shaker and MCAS.
- aircraft systems not adhering to principles of Cockpit Resource Management CRM (MCAS, Stick Shaker, Air Data Reference Unit, AoA, Trim CUTOUT switches)
Possibly contributing factors into the accident:
- Corporate Culture within Boeing in designing aircraft
- Corporate Culture within FAA in certifying aircraft
- Corporate Culture in Ethiopian Airlines, which did not ensure their flight crew were fully aware of the implications of the LionAir Crash and the related EAD as well as Boeing and FAA approved emergency procedures
- Less than optimal crew performance, e.g. loss of situational awareness with respect to speed and thrust
As I see it (also watching the heated discussions between people condemning Boeing for their MCAS system and lack of safety minded/fault tolerant implementation of that system and those folks claiming the crew could have averted the crash but did not follow procedures) we have to deal with a lot of human factors here, the first and foremost being the startle effect, in particular with a permanent stick shaker activation that does not stop despite lowering the nose in an instinctive reaction. The added stress of the continuous noise and rattle must have contributed to further confusion - and this scenario has never been trained for, no pilot has been prepared for such a scenario yet, in which a faulty AoA value could cause a permanent stick shaker. Therefore it appears likely to me, that the focus of the crew was to keep the aircraft flying and clear of terrain while trying to get rid of that noise and stress.
#2627
Join Date: Apr 2011
Location: YXU
Programs: AC SE100K, National E/E, HH Diamond, IHG Diamond, MB, Avis PC
Posts: 967
I don't think the fuel load would be a problem in this case. The distance from ADD to NBO is 625nm. That's a tad over a sixth of the 7M8's range. Also, the 737 can't dump fuel (neither does the A32X).
#2628
Join Date: Apr 2011
Location: YYC
Programs: AC SE 1MM, Marriott Ambassador
Posts: 3,397
Interesting, thank you. So, as an aside, can a 7M8 land on a full load of fuel? Or is the only solution to burn it off?
#2629
Formerly known as tireman77
Join Date: Dec 2013
Posts: 5,514
That's a pretty reasonable and balanced article, IMHO. (It's actually more of an opinion piece than a news article, but still reasonable). It's authored by Simon Hradecky, who is the main guy behind the Aviation Herald.
Two more excerpts:
And:
I think I agree with everything he's written in the article.
Two more excerpts:
And:
I think I agree with everything he's written in the article.
"Given the current partly heated discussions in aviation communities, all of which I feel do not take the human factors as well as cockpit resource management into account, I am about to provide my current understanding of the situation and my assessment based on the preliminary report as well as the additional documentation (relaxing my own editorial principles for a moment, that my personal opinion should not become visible in or influence my coverages):"
The part that describes the outdated manual at ET was in the factual portion of the publication.
I agree with Mr. Hradecky for the most part, the only caveat I would add is that the issues he raises about corporate culture at Boeing and the FAA are not limited to Boeing & the FAA as they apply to all major airplane manufacturers and regulating bodies. One must remember that TC & EASA, as well as all other governing bodies approved this system on this aircraft. Ever since the 777, It has been impossible for a regulating body to adequately understand what they are regulating, and this is the new reality. We need to trust the manufacturers, and people are not good at trusting corporations.
#2630
Join Date: Apr 2011
Location: YXU
Programs: AC SE100K, National E/E, HH Diamond, IHG Diamond, MB, Avis PC
Posts: 967
AFAIK an overweight landing checkup has to be conducted if it lands over MLW (69.3t), but the 7M8 certified to land up to it's MTOW (82.2t). And I'm pretty certain many larger aircraft can as well.
#2631
FlyerTalk Evangelist
Join Date: Mar 2005
Location: YYZ
Programs: AC*SE 2MM
Posts: 16,650
Here: Crash: Ethiopian B38M near Bishoftu on Mar 10th 2019, impacted terrain after departure
On Apr 11th 2019 The Aviation Herald received a full copy of the Flight Operations Manual (FOM), Revision 18B released on Nov 30th 2018, which is currently being used by Ethiopian Airlines (verified in April 2019 to be current). Although Boeing had issued an operator's bulletin on Nov 6th 2018, which was put into Emergency Airworthiness Directive 2018-23-51 dated Nov 7th 2018 requiring the stab trim runaway procedure to be incorporated into the FOM ahead of the sign off of this version of the FOM (the entire document is on file but not available for publishing), there is no trace of such an addition in the entire 699 pages of the FOM.
On Apr 11th 2019 The Aviation Herald received a full copy of the Flight Operations Manual (FOM), Revision 18B released on Nov 30th 2018, which is currently being used by Ethiopian Airlines (verified in April 2019 to be current). Although Boeing had issued an operator's bulletin on Nov 6th 2018, which was put into Emergency Airworthiness Directive 2018-23-51 dated Nov 7th 2018 requiring the stab trim runaway procedure to be incorporated into the FOM ahead of the sign off of this version of the FOM (the entire document is on file but not available for publishing), there is no trace of such an addition in the entire 699 pages of the FOM.
Assuming it is correct, looks like the EAD was not included in the manual but seems training of some kind was done by ET.
#2632
A FlyerTalk Posting Legend
Join Date: May 2002
Location: YEG
Programs: HH Silver
Posts: 56,446
After some post deletions I'll remind everyone of an advisory I posted recently against widening the thread discussion to the real or perceived training of other pilots in other parts of the planet as this isn't the place for that discussion.
tcook052
AC forum Mod.
tcook052
AC forum Mod.
#2633
Join Date: Aug 2012
Location: YVR
Programs: AC E50K, NEXUS
Posts: 645
If you think my conclusions are incorrect, explain how and why. I'm pretty sure you can't.
#2634
Join Date: Aug 2012
Location: YVR
Programs: AC E50K, NEXUS
Posts: 645
First off, let me say how much I appreciate that we're able to have a reasoned discussion about this, without slipping into the sort of invective that is oh-too-common in many online debates today. You & I may end up agreeing to disagree, but that's the nature of a debate.
Arguing with an REDACTED
#2635
Join Date: Dec 2005
Location: YYZ most of the time
Programs: AC SE100K MM, Princess Elite
Posts: 3,921
Have you? Was the aircraft re-sequenced into the arrival stream and that’s why it took so long? Maybe I don’t know any better but unless they are taken a LONG way away from the airport to get back in line it should take less, and can take as little as 5 minutes (or less) if priority is needed.
#2636
A FlyerTalk Posting Legend
Join Date: Sep 2012
Location: SFO
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Posts: 44,324
Have you? Was the aircraft re-sequenced into the arrival stream and that’s why it took so long? Maybe I don’t know any better but unless they are taken a LONG way away from the airport to get back in line it should take less, and can take as little as 5 minutes (or less) if priority is needed.
#2637
Suspended
Join Date: Aug 2018
Posts: 669
I have had go around take 5 min(Regina) to 45 min(Hong Kong)
#2638
Join Date: Dec 2005
Location: YYZ most of the time
Programs: AC SE100K MM, Princess Elite
Posts: 3,921
That being said, today I saw multiple missed approaches at TZ, one after another after another, and they all kept saying they wanted to try again. I think the same flight missed 3 times in a row, and each one was 6-8 min apart and that's with sequencing other Q400s and dealing with their missed approaches also.
#2639
FlyerTalk Evangelist
Join Date: Mar 2005
Location: YYZ
Programs: AC*SE 2MM
Posts: 16,650
Have you? Was the aircraft re-sequenced into the arrival stream and that’s why it took so long? Maybe I don’t know any better but unless they are taken a LONG way away from the airport to get back in line it should take less, and can take as little as 5 minutes (or less) if priority is needed.
#2640
Join Date: Dec 2005
Location: YYZ most of the time
Programs: AC SE100K MM, Princess Elite
Posts: 3,921