Boeing 737 (MAX) news

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Re: Boeing 737 (MAX) news

Post by sn26567 » 21 Jan 2020, 22:33

Boeing expects the 737 MAX to return to service in mid-2020

https://www.aviation24.be/manufacturers ... -mid-2020/

Following Boeing’s announcement regarding the 737MAX aircraft, WestJet today announced it will be updating its schedule to remove the aircraft through to June 24, 2020. Any affected guests will be proactively contacted once work is complete.

We thank our guests for their patience and our WestJetters for their commitment to keeping our airline moving safely and on time as we continue to adjust our schedule,” said Ed Sims, WestJet President and CEO. “We remain confident in the regulatory process undertaken by the Federal Aviation Authority (FAA) and Transport Canada to ensure the safe return of the aircraft.”

WestJet has completed more than 98 per cent of its planned departures even while its 13 MAX aircraft remain on the ground.
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Re: Boeing 737 (MAX) news

Post by sn26567 » 22 Jan 2020, 14:55

Icelandair does not expect the B737 MAX in operation within its route network during the high season of summer 2020. This will have a minimal impact on Icelandair’s flight schedule in 2020.

Southwest Airlines is now 70% likely to acquire JetBlue, according to Stifel airline analyst Joe DeNardi. Any such deal would allow Southwest to diversify its fleet and acquire A321neo slots, while helping minimising the impact of the B737 MAX groundings.
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Re: Boeing 737 (MAX) news

Post by Bracebrace » 23 Jan 2020, 10:57

737MAX wrote:
21 Jan 2020, 18:18
What do you mean about the 747-8*?
Oops, missed this question.

Because these aircraft are cost effective in development because they rely on heritage certification. The development is different, the starting point is "where can we improve", then different people work in one single area, come with a solution, and it becomes a challenge to see how the improvement affects the complete product, the main question (for us) being "is it still safe?".

Many cases have shown the result is quite often "band aid work". The MD-11 crashed as well because of a smaller THS they decided to compensate with a computer. The NG has some rather strange "quirks" and this overly heavy pitch (to compensate the new engines?) compared to loosy goosy roll (new wing).

My philosophy is you can't band aid band aid... If you don't want to pay for heavy surgery, you need a new baby.

The 747-400 was indeed close to a new aircraft in a old fuselage, but still... so I'm simply curious about the 747-800.

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Re: Boeing 737 (MAX) news

Post by sn26567 » 23 Jan 2020, 12:20

Bracebrace wrote:
23 Jan 2020, 10:57
Because these aircraft are cost effective in development because they rely on heritage certification. The development is different, the starting point is "where can we improve", then different people work in one single area, come with a solution, and it becomes a challenge to see how the improvement affects the complete product, the main question (for us) being "is it still safe?".
Do you think your theory also applies to the A320neo vs the A320? The changes were less drastic than on the 737MAX.
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Re: Boeing 737 (MAX) news

Post by Bracebrace » 23 Jan 2020, 14:15

That's a good question. Not that familiar with the Airbus besides basic knowledge. If an aircraft is more software based, the testing is easier to do I guess (input - black box - output). But it is true that the A320 platform/architecture will reach a limit some day as well, but it is more adaptable. The Airbus fly-by-wire setup is (my idea) a more complicated structure than the B777 (more computers, important feedback loop,...), but the fact that it is a fly-by-wire makes it easier to test and tweak. And this is only speaking of flight characteristics. But it remains similar hydraulics design, similar electrics (fixed 400hz I believe?)... etc...

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Re: Boeing 737 (MAX) news

Post by Homo Aeroportus » 23 Jan 2020, 14:57

A32S has fixed 400Hz indeed, with conventional CSD/IDG.
More recent programs (A380, A350) use variable frequency distribution.

Don't know much about the details on Hyd but that the AB has a Yellow circuit on the right hand side and a green circuit on the left hand side ...
And the A32S has an additional Pax entertainment system during taxi : the "Barking Dog" ;)

One thing A and B seem to have in common is to forget to inform FC fully about those little details such as MCAS on the one hand and the (less catastrophic) change in control law of the side stick when WoW is activated (see HAM crosswind landing some 8-10 years ago).


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Re: Boeing 737 (MAX) news

Post by Bracebrace » 23 Jan 2020, 15:42

Homo Aeroportus wrote:
23 Jan 2020, 14:57
And the A32S has an additional Pax entertainment system during taxi : the "Barking Dog" ;)
The PTU test? :lol: Still on the neo?

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Re: Boeing 737 (MAX) news

Post by Homo Aeroportus » 23 Jan 2020, 17:21

Bracebrace wrote:
23 Jan 2020, 15:42
Homo Aeroportus wrote:
23 Jan 2020, 14:57
And the A32S has an additional Pax entertainment system during taxi : the "Barking Dog" ;)
The PTU test? :lol: Still on the neo?
No in test but during normal SETI/SETO.
Just can't help answering this way when a fellow passenger is somewhat anxiously asking what that noise is. You know those standing up in the aisle 1 sec after On Block and having to wait 10 min before disembarking.
:lol:

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Re: Boeing 737 (MAX) news

Post by Homo Aeroportus » 23 Jan 2020, 17:21

Homo Aeroportus wrote:
23 Jan 2020, 17:21
Bracebrace wrote:
23 Jan 2020, 15:42
Homo Aeroportus wrote:
23 Jan 2020, 14:57
And the A32S has an additional Pax entertainment system during taxi : the "Barking Dog" ;)
The PTU test? :lol: Still on the neo?
Not in test but during normal SETI/SETO.
Just can't help answering this way when a fellow passenger is somewhat anxiously asking what that noise is. You know those standing up in the aisle 1 sec after On Block and having to wait 10 min before disembarking.
:lol:

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Re: Boeing 737 (MAX) news

Post by Homo Aeroportus » 23 Jan 2020, 17:35

Homo Aeroportus wrote:
23 Jan 2020, 17:21
Homo Aeroportus wrote:
23 Jan 2020, 17:21
Bracebrace wrote:
23 Jan 2020, 15:42


The PTU test? :lol: Still on the neo?
Not in test but during normal SETI/SETO.
Just can't help answering this way when a fellow passenger is somewhat anxiously asking what that noise is. You know those standing up in the aisle 1 sec after On Block and having to wait 10 min before disembarking.
:lol:

H.A.
Sorry, translation of the above lingo :

PTU, Power Transfer Unit, is a pump that activates automatically to maintain the pressure in the hydraulic circuit when the engine that normally powers it has been shut off after landing.
This is the SETI, Single Engine Taxi In.
Conversely you have SETO.
This PTU produces a hoarse sound that can be heard especially near the centre of the cabin. When a Pax queries about the origin of this sound, the typical answer is : Oh, its a dog barking in the cargo hold.

SETI/SETO is used to save fuel thanks to taxiing on a single engine but I don't agree with its systematic use.


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Re: Boeing 737 (MAX) news

Post by Poiu » 23 Jan 2020, 18:12

Homo Aeroportus wrote:
23 Jan 2020, 17:35
PTU, Power Transfer Unit, is a pump that activates automatically to maintain the pressure in the hydraulic circuit when the engine that normally powers it has been shut off after landing.
This is the SETI, Single Engine Taxi In.
Conversely you have SETO.
This PTU produces a hoarse sound that can be heard especially near the centre of the cabin. When a Pax queries about the origin of this sound, the typical answer is : Oh, its a dog barking in the cargo hold.
Good try, but not entirely correct, during single engine taxi an electric pump is pressurising the relevant hydraulic system. The electric pump generates a high frequency noise which you will hear as well during operation of the cargo doors.
As Brace correctly wrote, the PTU (power transfer unit) runs briefly when the second engine is started to test its functionality. If the pilots forget to switch on the electric pump during single engine taxi you’ll hear the PTU constantly.

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Re: Boeing 737 (MAX) news

Post by sn26567 » 23 Jan 2020, 18:55

Lessor AerCap chief executive Aengus Kelly says there is no alternative to the B737 MAX and it would be “absolutely stupid” for Boeing to launch a replacement (NMA or 797) before the next wave of technology a decade from now.

Boeing new CEO Dave Calhoun indeed said that plans to develop the NMA or 797 would be put on a back burner, the first priority being to restore confidence in the 737 MAX.

Calhoun also said simulator training for the B737 MAX prompted its decision to push back its timeline to mid 2020. There are no new technical reasons. He expects to resume B737 MAX production months before its forecasted mid-year return to service.

Air Canada said that it has now removed the B737 MAX from its operating schedule until 30 June 2020.

FlyDubai
is looking for short- to medium-term leasing options as the B737 MAX will not be cleared to fly until the middle of 2020.

SpiceJet
says the new B737 MAX delay will mean induction of more aircraft on a short-term lease for the carrier.
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Re: Boeing 737 (MAX) news

Post by Desert Rat » 24 Jan 2020, 05:58

Poiu wrote:
23 Jan 2020, 18:12
Homo Aeroportus wrote:
23 Jan 2020, 17:35
PTU, Power Transfer Unit, is a pump that activates automatically to maintain the pressure in the hydraulic circuit when the engine that normally powers it has been shut off after landing.
This is the SETI, Single Engine Taxi In.
Conversely you have SETO.
This PTU produces a hoarse sound that can be heard especially near the centre of the cabin. When a Pax queries about the origin of this sound, the typical answer is : Oh, its a dog barking in the cargo hold.
Good try, but not entirely correct, during single engine taxi an electric pump is pressurising the relevant hydraulic system. The electric pump generates a high frequency noise which you will hear as well during operation of the cargo doors.
As Brace correctly wrote, the PTU (power transfer unit) runs briefly when the second engine is started to test its functionality. If the pilots forget to switch on the electric pump during single engine taxi you’ll hear the PTU constantly.
That's right, the main issue with the PTU beside is "funny" noise is in case of Hydraulic leak on the green or yellow, the opposite side will overheat and lead to both G and Y loss, one because of leak the other one bevause of hyd fluid overheat.
This flaw has been corrected though the PTU inhibition logic service bulletin/modification a few years ago.

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Re: Boeing 737 (MAX) news

Post by TLspotting » 24 Jan 2020, 18:13

WestJet announced it will be updating its schedule to remove the B737 MAX through to 24 June 2020.
I'm Thibault Lapers, spotter in Belgium for now 3 years, but not yet across the world and a huuuuuge aviation geek ! Join me on Facebook & Twitter @TLspotting

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Re: Boeing 737 (MAX) news

Post by TLspotting » 24 Jan 2020, 20:49

S&P Global Ratings placed Boeing ‘A-‘ credit rating on ‘credit watch’ with negative implications, citing a rise in costs and cash outflows at the planemaker due to a further B737 MAX delay.
I'm Thibault Lapers, spotter in Belgium for now 3 years, but not yet across the world and a huuuuuge aviation geek ! Join me on Facebook & Twitter @TLspotting

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Re: Boeing 737 (MAX) news

Post by sn26567 » 27 Jan 2020, 22:38

FAA has called senior US airline officials and told them that the agency could approve the grounded B737 MAX’s return to service before mid-2020.

Oman Air has no plans to cancel its B737 MAX order and expects to conclude compensation talks with Boeing in due time.

Southwest Airlines reached an agreement with Boeing in 4Q 2019 for compensation related to 2019 financial damages due to the B737 MAX groundings. The compensation from Boeing will be accounted for as a reduction of the purchase price of its 31 owned MAX aircraft and future MAX from orders.

Southwest says its current planning scenario is for 27 B737 MAX deliveries in 2020, bringing the total to around 60 MAXs. Southwest also expects to retire 16 B737-700s in the year.

Russian airline Utair is seeking three B737NGs to lease in 2020, as a bridge until its B737 MAX aircraft begin delivering.
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Re: Boeing 737 (MAX) news

Post by sn26567 » 28 Jan 2020, 16:48

Ryanair has warned pilots of possible base closures and job cuts as the date for delivery of its first 10 of Boeing’s grounded 737 MAX aircraft slipped into the autumn. In a memo dated Jan. 27, the low-cost airline said Boeing would not deliver the first aircraft until September or October at the earliest, as Ryanair does not take deliveries during its peak summer months of June, July and August.

Source: Reuters
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Re: Boeing 737 (MAX) news

Post by sn26567 » 28 Jan 2020, 23:03

Boeing has secured financing commitments for more than US$12 billion from over a dozen banks, as financial pressures mount due to a production halt on its B737 MAX aircraft.
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Re: Boeing 737 (MAX) news

Post by sn26567 » 29 Jan 2020, 14:51

Boeing doubles projected cost of 737 MAX grounding to $18.4 billion.

https://www.seattletimes.com/business/b ... 4-billion/

Remember that Boeing wanted to save money on security devices for the MAX? These are the results. Never ever compromise on safety!

In other news, Chairman and CEO David Calhoun said on CNBC Squawk Box that Boeing won't change the name of the 737 MAX.
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Re: Boeing 737 (MAX) news

Post by sn26567 » 01 Feb 2020, 23:59

Boeing doubled its projection of the cost of the B737 MAX crisis, adding another US$9.2 billion in losses, accounting write-offs and estimated higher future production costs. This brings the total to $18.4 billion.

Spirit AeroSystems has reached an agreement with Boeing relating to the B737 MAX production rate. Under the agreement, Spirit will restart production slowly, ramping up deliveries throughout the year to reach a total of 216 MAX shipsets delivered to Boeing in 2020.
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