Beautiful..best of luck for B with showing her off...
The vibration stresses that this induces on the engine must surely have been ascertained and dampened down to a very high degree of precision by GE; a problem with insufficient stall margin is a distinct possibility, as well as too small a blade count or incompatible blade count rows as Lightsaber ...Jump to post
Something is still missing . . an engine can be changed in less than a day . . if it was premature wear, the initial flight test could be done with six engines. One pair flying, one pair being disassembled, one pair being reassembled. The FADEC could be programmed to not permit max thrust. They cou...Jump to post
All things considered this is quite a rational business decision by B. In fact I suspect they actually decided to cancel the 778 outright but will announce it in stages to save face somewhat. They need the resources for the 737MAX which still has no crystal-clear visibility on its return to service ...Jump to post
Jet engine innovation tho :checkmark: :checkmark: Since the advent of the widebody, advances in airliner technology are largely advances in fuel efficiency...and advances in fuel efficiency are 80% advances in engine technology... So long as you are stuck with wing-and-tube, don't expect anything r...Jump to post
No. Garuda's 4.9 billion would have fully contributed to Boeings revenue but only part of it - say 10 % or 490 million - would have been profits. Those 490 million are the actual loss. Even then, there's a high chance that those slots will be taken up by someone else. So the direct impact on Boeing...Jump to post
Does this include the 4.9 billion order from Garuda Indonesia that was cancelled? or is this just costs in general, so its 4.9billion on top of the 5.6billion? Er, no. The $4.9billion Garuda order would have yielded a theoretical profit at some future date as each individual aircraft was delivered,...Jump to post
Using US airlines, who are notoriously inept at making cargo a significant part of their portfolio, is not an example giving the correct perspective. Lufthansa, for example, derives 7% of their revenue from logistics, for Singapore Airlines it's around 5%, and for Emirates it's around 14%. Cargo ma...Jump to post
Those specific kgs tell the story. Thanks And raise a lot more new questions. 25 kg/ 90min = 133 kg/ 8 hours. So 200 kg/ 8 hours can't be explained with "burn fuel to carry fuel" alone. The lower cruise altitude seem to matter a lot. No wonder the range figures on paper are so extreme mor...Jump to post
EY’s root financial problem is having shareholders with very deep and bounteous pockets...so when they chose to model themselves after the defunct Swissair business model...investing in a wide range of non-controlling or quasi-controlling interests in other international carriers in order to form an...Jump to post
What FAR governs longitudinal stability in the stall regime? And what specific provision therein would a MCAS-style software solution to such stability have to comply with? When would this software approach be deemed inadequate and have to be complemented/replaced by a physical fix?
Ordering a plane with no airworthiness is just a stupid move. Ordering a plane with over half a trillion USD in orders is much less so...Boeing, the FAA, CFM, the state of Washington, the Federal Government and everybody and their uncle will make sure that the MAX is safely certified...have no doub...Jump to post
What else is he going to say? We don't really like the MAX but Boeing gave us a price we couldn't refuse? :checkmark: :checkmark: Exactly...he just came up with any random reason...would have been better not to say anything at all... Although in all fairness...I am sure the MAX will be as safe as a...Jump to post
For reference the GE9X is shown as adding an extra 3t per aircraft and has a slightly higher diameter for aero purposes. Very interesting...I know GE have said that the GE9X will be "slightly heavier" than the GE90-115B, but did not quote any figures...do you have a reference for the extr...Jump to post
Are tires really #3 operating expense after fuel and labor. What are hrly costs of those turbines not including fuel. I recall a thread where MX people confirmed that tires were in any case the No 1 spare part in terms of inventory rotation...a lot of movement with all that rubber-smoke generation ...Jump to post
Funny that they should do this when the engine is rated at circa 105K lbs thrust for operational use. My guess is they simply did it because they could.
I severely doubt whether GE will provide a thrust bump option up to that level of thrust, among others because of Mvca / Mvcg considerations.
And one that knows how to get a very meaningful discount from Boeing... You would be surprised by how expensive 737 MAX are. In addition the guys in Seattle are quite disciplined managing the backlog thus protecting 737's value in the long run. For this large an order at this time required a discou...Jump to post
How on earth can new seats cost 50 million Euros per aircraft? Surely they could find suppliers that charge reasonable prices for this stuff. It's not as if most of these seats are even particularly comfortable or advanced. You might want to check out Swiss blog post detailing their recent A340 cab...Jump to post
My understanding is that a stator-vane actuator redesign was already implemented just before the first GE9X was flight tested.
The question now is whether this latest problem is with this redesign or with some other aspect of the actuator?
Message to Moderators Both Boeing and GE have now announced delays with the GE9X and 777X first flight, at least until the fall: https://www.reuters.com/article/us-boeing-777x/boeings-777x-faces-engine-snags-questions-rise-over-delivery-goal-idUSKCN1T62KU https://www.flightglobal.com/news/articles/...Jump to post
“...including pieces of a variable stator-vane assembly which broke free...”
https://www.fool.com/investing/2019/06/08/the-revolutionary-boeing-777x-jet-is-running-behin.aspx Apparently issues with the GE9X stator actuation mechanism which was the object of a re-design recently. First flight slated before the year end instead of end of June, with EIS for late 2020 or possib...Jump to post
The air to have high enough pressure and temperature to actually power the air cycle machines in the packs. My guess is you wouldn't get what you need from the low-pressure compressor (fan). I can only speak for the Rolls-Royce Trent 772 and Trent XBW. They take bleed air from the intermediate pres...Jump to post
In major airports with jetway parking stands, is ground electric power supply usually provided and used by airliners during power-on and start-up? Or is the APU the usual resource used to provide start-up power after being powered on by battery power? What about secondary airports and the like? Is t...Jump to post
I understand that the function of the air conditioning packs is to lower the temperature of the air coming off the high pressure compressor and reduce its pressure in order to transform it into cabin air. Why in that case not bleed that air off the low pressure compressor, thereby taking lower-tempe...Jump to post
I thought the 787 landing equipment is already maxed out! That's my understanding too...the landing gear it seems can take no more. But if it is at all possible, remains the fact that 6 tons is huge...assuming that it would all go into fuel to prolong range, where is that extra fuel storage space g...Jump to post
Is Vox a household name now?...does everyone know what exactly it is?...to my mind, it should be preceded by "the YouTube Channel"...Jump to post
Admit fault before the investigations have concluded? That would be incredibly foolish. Of course you'd think that, your tireless efforts to exonerate Boeing and blame anything or anyone else has been impressive in the three threads. Even the most diehard Boeing fan cannot deny that the absolutely ...Jump to post
Be pro-active...don’t muck around...make LH an offer they really really can’t refuse for their 100 narrowbody requirement NOW...and announce the MAX order in Paris...just do it for God’s sake...ACT!... Faro You mean like offering LH US$100 milion for each Max they take ? I mean doing a Ryanair/738 ...Jump to post
Be pro-active...don’t muck around...make LH an offer they really really can’t refuse for their 100 narrowbody requirement NOW...and announce the MAX order in Paris...just do it for God’s sake...ACT!...
If LH orders the MAX, then Airbus must have royally screwed up. I just don't see that happening. Boeing has a dire, pressing incentive to sell the MAX to LH that Airbus doesn't have with the A32X, ie to salvage the public image of the MAX. That incentive can be translated into a hard cash discount....Jump to post
Woudl it be fair to say that, by and large, 'richer' airports use buses less?
That in any case is my distinct impression. Gates with direct jetbridge access are expensive installations...
Max Q wrote:It’s already happened
There’s United, American, Delta and the rest
I'd say 737's for LH is improbable but not impossible. If Boeing gives them a sweetheart deal then it will be very hard for LH to say no and for Airbus to match the price. And if they are allowed to convert to NMA then it will be even harder to refuse. Given the MAX's media image at the moment, B w...Jump to post
In fact, not just LH but any airline in need of an appreciable number of narrowbody jets would be insane not to consider a deep-discounted purchase of MAX's at the moment. The only non-commercial assumption that they need to adopt is that B will one day resolve the current MAX issues. I for one thin...Jump to post
Haha. Why would they order MAX. That is a laugh. NMA I can see... Once the MCAS/certification issues are sorted --and they will eventually be sorted-- they'll order it if the price is right. In fact this would be a singularly opportune moment for B to bounce back with the MAX: make LH a monetary pr...Jump to post
Fair chance they would have had to re-design the wing-box or --bits of the wing-box-- if the MLG bay was in any way moved from its present location to accomodate a longer gear strut...and once you start fiddling with the wing-box, you're likely in new regulatory territory...
So the Secretary of Transport has asked DoT Inspector General to reviewnthe certification process. A Washington grand jury has issued a subpoena for documents. Canada and the EU have announced their own reviews. Now it has been reported that the FBI is supporting the DoT enquire. Meanwhile a congre...Jump to post
Anyone who wants to contribute intelligently to this discussion needs to read and understand this FAA Advisory Circular. https://www.faa.gov/documentLibrary/media/Advisory_Circular/AC_21.101-1B.pdf Just some light bedtime reading there. A particular quality about US legal and administrative documen...Jump to post
But, most of all, the FAA need to bring back in-house the vast majority of authorisations it signed over to Boeing. As has been demonstrated with both the 787 and 737 Max, Boeing are not to be trusted to do their own certification work. Yes, with the MAX MCAS issue, this can become a serious matter...Jump to post
I think this is a bit overblown. Of those examples: 787: new battery tech, difficult to diagnose failure mode, things happen with new hardware KC46: I'm sure a large part of this is due to military procurement nonsense 748 stab tank: problem, but not a p1 adoption blocker, LH was able to live with ...Jump to post
While we know very little about what Boeing has planned for the MOM/797, you can bet that the concept is developed enough at this point that Boeing isn't going to toss it aside to replace it with a clean-sheet 737 replacement, especially when there are over 4,000 737 MAX orders on the books. Boeing...Jump to post
Cash. If the ET accident proves to have been due to MCAS and if B’s MCAS tweak is not enough to rectify matters to the regulators’ satisfaction, B is looking at a potentially significant shortfall in their operating cashflow projections. That’s two big ifs. Should they find themselves in that posit...Jump to post
I am sorry but the B737 MAX is not an outdated product. Just because it is a derivative of an existing product does not make it outdated. I certainly do not see how the 737 MAX is at the end of the road with thousands of orders and even B737- 300, -400, - 500 (two generations ago) are still being f...Jump to post
Cash. If the ET accident proves to have been due to MCAS and if B’s MCAS tweak is not enough to rectify matters to the regulators’ satisfaction, B is looking at a potentially significant shortfall in their operating cashflow projections. That’s two big ifs. Should they find themselves in that positi...Jump to post
I think this highlights in a ridiculously manifest way a new risk for civil air transport...media risk, including social media risk When after AA191 the DC-10 was grounded it was because it was abundantly clear what had caused the accident and the potential flaw in the design. We are nowhere there ...Jump to post
However people spin this, the fact is Boeing admits there is something to be done to improve the safety of this aircraft. The fact that the Lion Air crash was not enough for them to do that immediately, and then the fact that their response to the second crash is so stale is massively disappointing...Jump to post