Search found 272 matches

by LDRA
Wed Mar 13, 2019 9:58 pm
Forum: Civil Aviation
Topic: How does Boeing "survive" this crisis?
Replies: 53
Views: 5357

Re: How does Boeing "survive" this crisis?

Short term, beside technical activities, retire current ceo

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by LDRA
Wed Mar 13, 2019 9:57 pm
Forum: Civil Aviation
Topic: How does Boeing "survive" this crisis?
Replies: 53
Views: 5357

Re: How does Boeing "survive" this crisis?

Long term wise, launch NSA

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by LDRA
Wed Mar 13, 2019 1:52 pm
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6472
Views: 716107

Re: Should airline regulators consider grounding B737 MAX series

Does WN AA UA AC WS all have AoA display or AoA disagree indication options ordered on their aircraft. That helps in explain the decision

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by LDRA
Tue Mar 12, 2019 12:54 am
Forum: Civil Aviation
Topic: B737MAX Grounded Worldwide Q1 2019
Replies: 6472
Views: 716107

Re: Should airline regulators consider grounding B737 MAX series

What is the implication of the two closely spaced mishaps on 737 max hull insurance rate?

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by LDRA
Wed Mar 06, 2019 2:28 am
Forum: Civil Aviation
Topic: Air China 983 PEK-LAX Diversion to Anadyr
Replies: 35
Views: 7935

Re: Air China 983 PEK-LAX Diversion to Anadyr

9w748capt wrote:
LDRA wrote:
188 pax on a 77W though...


And? What's your point?


Load factor

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by LDRA
Wed Mar 06, 2019 1:38 am
Forum: Civil Aviation
Topic: Air China 983 PEK-LAX Diversion to Anadyr
Replies: 35
Views: 7935

Re: Air China 983 PEK-LAX Diversion to Anadyr

188 pax on a 77W though...

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by LDRA
Tue Mar 05, 2019 4:07 am
Forum: Civil Aviation
Topic: Reuters: Rolls Royce withdraws bid for Boeing NMA project
Replies: 235
Views: 32576

Re: Reuters: Rolls Royce withdraws bid for Boeing NMA project

Also how much NMA market can a refreshed 787-8 capture?
I am talking about new 6000lb thrust geared engine, redesigned structure for 200Ton takeoff weight, center fuel tank deletion.

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by LDRA
Tue Mar 05, 2019 4:03 am
Forum: Civil Aviation
Topic: Reuters: Rolls Royce withdraws bid for Boeing NMA project
Replies: 235
Views: 32576

Re: Reuters: Rolls Royce withdraws bid for Boeing NMA project

I thought NMA will be 8 abreast cross section, due to 7 abreast not space efficient?

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by LDRA
Fri Mar 01, 2019 6:23 pm
Forum: Civil Aviation
Topic: Korean Air A220 Significant Engine Damage
Replies: 55
Views: 23813

Re: Korean Air A220 Significant Engine Damage

What major component has not had a failure on GTF? :roll:

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by LDRA
Fri Mar 01, 2019 3:09 pm
Forum: Civil Aviation
Topic: Reuters: Rolls Royce withdraws bid for Boeing NMA project
Replies: 235
Views: 32576

Re: Reuters: Rolls Royce withdraws bid for Boeing NMA project

Or more realistically RR can not meet the 2025 EiS and a competitor who can demands exclusivity on the 797 in return for making the 2025 EiS and probably investing some money into the development. It was always certain that GE/CFM with a LEAP 1.5 and RR with a Ultrafan engine as the 2 engine option...

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by LDRA
Fri Mar 01, 2019 3:08 pm
Forum: Civil Aviation
Topic: Reuters: Rolls Royce withdraws bid for Boeing NMA project
Replies: 235
Views: 32576

Re: Reuters: Rolls Royce withdraws bid for Boeing NMA project

https://www.avioaero.com/What/Mechanical-Transmissions


They bought it for consolidate engine accessories transmission components. GE was also considering buying Woodward at one point for example
-->

GEUltraFan9XGTF wrote:
Yep, GE bought Avio to do...nothing...

https://www.avioaero.com/What/Mechanical-Transmissions


They bought it for consolidate engine accessories transmission components. GE was also considering buying Woodward at one point for example

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by LDRA
Fri Mar 01, 2019 2:26 pm
Forum: Civil Aviation
Topic: Reuters: Rolls Royce withdraws bid for Boeing NMA project
Replies: 235
Views: 32576

Re: Reuters: Rolls Royce withdraws bid for Boeing NMA project

Then Boeing should want second source for engine. New technology in a new product carries amplified risk The Pratt gearbox is low risk. There has not been a single problem with the gearbox in the worldwide fleet. The LEAP core is also low risk all the bugs have now been ironed out. Fitting a low ri...

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by LDRA
Fri Mar 01, 2019 2:35 am
Forum: Civil Aviation
Topic: Reuters: Rolls Royce withdraws bid for Boeing NMA project
Replies: 235
Views: 32576

Re: Reuters: Rolls Royce withdraws bid for Boeing NMA project

NMA engine is 5klb class, a class above current Leap engine. Core mass flow increase would be substantial enough GE can not reuse Leap core; Leap already has high pressure ratio, can't increase pressure ratio enough to get required mass flow. They are going to need a new design HP compressor I thin...

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by LDRA
Thu Feb 28, 2019 9:42 pm
Forum: Civil Aviation
Topic: Reuters: Rolls Royce withdraws bid for Boeing NMA project
Replies: 235
Views: 32576

Re: Reuters: Rolls Royce withdraws bid for Boeing NMA project

But didn't Boeing say they wanted to use existing engine tech for this program? (Thereby limiting development costs and technical risk) Oh yeah, its all supposedly existing technology for low risk. But somehow going to be a "game changer" versus current aircraft. Powerpoint Rangers at wor...

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by LDRA
Thu Feb 28, 2019 7:31 pm
Forum: Civil Aviation
Topic: Reuters: Rolls Royce withdraws bid for Boeing NMA project
Replies: 235
Views: 32576

Re: Reuters: Rolls Royce withdraws bid for Boeing NMA project

NMA engine is 5klb class, a class above current Leap engine. Core mass flow increase would be substantial enough GE can not reuse Leap core; Leap already has high pressure ratio, can't increase pressure ratio enough to get required mass flow. They are going to need a new design HP compressor I think

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by LDRA
Thu Feb 28, 2019 4:53 pm
Forum: Civil Aviation
Topic: Reuters: Rolls Royce withdraws bid for Boeing NMA project
Replies: 235
Views: 32576

Re: Reuters: Rolls Royce withdraws bid for Boeing NMA project

CFM's offering has to be flawless. With sole source engine, it could drag down NMA program if there is issue.

Is CFM's proposal a derivative of LEAP? Curious how they control tech risk

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by LDRA
Thu Feb 21, 2019 6:27 pm
Forum: Civil Aviation
Topic: Icelandair negotiating with Boeing and Airbus for a 757 replacement
Replies: 123
Views: 23653

Re: Icelandair negotiating with Boeing and Airbus for a 757 replacement

The whole Icelandair thing is pretty fishy

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by LDRA
Tue Feb 19, 2019 12:32 am
Forum: Civil Aviation
Topic: FAA Probes Southwest Airlines Over Baggage Weight Discrepancies- WSJ
Replies: 98
Views: 14002

Re: FAA Probes Southwest Airlines Over Baggage Weight Discrepancies- WSJ

For container loaded baggage, is the container weighted once bags are loaded in container

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by LDRA
Tue Feb 19, 2019 12:14 am
Forum: Civil Aviation
Topic: FAA Probes Southwest Airlines Over Baggage Weight Discrepancies- WSJ
Replies: 98
Views: 14002

Re: FAA Probes Southwest Airlines Over Baggage Weight Discrepancies- WSJ

If I were a SWA investor, I would demand to know why is it standard operation to manually count bags, and what efficiency gains can potentially be made throughout SW operation

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by LDRA
Sat Feb 16, 2019 7:24 pm
Forum: Civil Aviation
Topic: Boeing Lineup Circa 2025 - Where do they go Next
Replies: 46
Views: 8106

Re: Boeing Lineup Circa 2025 - Where do they go Next

If Boeing decided not doing NMA, there will be a 787-6,.

787-8 fuselodge and wing with redesigned structure for 200T MTOW, RR ultrafan, deletion of center wing box tank. Good for mission up to 9 hours

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by LDRA
Fri Feb 15, 2019 5:48 am
Forum: Civil Aviation
Topic: Confirmed: EK cancels 380's, orders 330neo and 350.
Replies: 214
Views: 34371

Re: Confirmed: EK cancels 380's, orders 330neo and 350.

What version of A330NEO? 251T A339 for 12hr+ mission, or 215T A338 for regional hops?

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by LDRA
Fri Feb 15, 2019 5:45 am
Forum: Civil Aviation
Topic: Airbus A350 to have RR Ultrafan Engines from ~2025, Ostrower
Replies: 224
Views: 42382

Re: Airbus A350 to have RR Ultrafan Engines from ~2025, Ostrower

Reduce hub size for more fan face area. The fan spins slower in GTF application, so less structural load on hub

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by LDRA
Fri Feb 08, 2019 3:38 am
Forum: Civil Aviation
Topic: Air Canada Summer 2019 long-haul changes
Replies: 330
Views: 59036

Re: Air Canada Summer 2019 long-haul changes

That seems like a fairly easy solution. There must be a few available. Still, replacing and refitting a whole 77W will be a huge cost. I know insurance will cover it, but wow. Thankfully nobody was harmed in the incident. They can pull seats, interior from the mishap frame. Would it be that bad ref...

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by LDRA
Thu Feb 07, 2019 12:23 am
Forum: Civil Aviation
Topic: Air Canada Summer 2019 long-haul changes
Replies: 330
Views: 59036

Re: Air Canada Summer 2019 long-haul changes

If AC is short one 77W this summer, that may explain why YVR-PEK (AC029/AC030) will no longer be operated with a 77W. That flight is now scheduled to operated by a 77L. As there are not enough 77Ls to take on this flight, that means that one of the currently scheduled 77L flights will have to be op...

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by LDRA
Wed Feb 06, 2019 1:56 pm
Forum: Civil Aviation
Topic: Solid NYT Article on MCAS and Lion Air Crash
Replies: 75
Views: 10217

Re: Solid NYT Article on MCAS and Lion Air Crash

Boeing dropped ball on MCAS hazard analysis. Previous auto trim system, STS, Mach trim have bounded output, which means there is limited control-ability issue, which means failure has low severity. That is why Boeing got away with single input feeding STS and mach trim(Still a shitty design never th...

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by LDRA
Wed Feb 06, 2019 1:52 pm
Forum: Civil Aviation
Topic: Solid NYT Article on MCAS and Lion Air Crash
Replies: 75
Views: 10217

Re: Solid NYT Article on MCAS and Lion Air Crash

In addition to MCAS, Single AoA failure also appearantly causes altitude mismatch(How the heck that happens?!), as well as air speed mismatch, plus possibility of false stall warning. That is a lot of critical stuff broken in a cockpit. I think the investigation will focus on cockpit workload/feasib...

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by LDRA
Sat Jan 26, 2019 7:28 pm
Forum: Civil Aviation
Topic: Boeing 797 Thread - 2019
Replies: 1250
Views: 169473

Re: Boeing 797 Thread - 2019

The CFM joint venture was modified to allow engines up to 50k lbs thrust https://www.flightglobal.com/news/articles/farnborough-cfm-to-compete-for-nma-even-if-required-450269/ Article says this is for NMA I am still wondering what would require more than 50k lbs, since the 767A made do with 48k lbs...

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by LDRA
Thu Jan 24, 2019 7:55 pm
Forum: Civil Aviation
Topic: UA 179 diversion to Goose Bay 1/19
Replies: 94
Views: 19474

Re: UA 179 diversion to Goose Bay 1/19

A B777 is a $200 million asset, they just don’t buy spares just in case a passenger gets ill near Goose Bay, not to mention crewing. It’s a big undertaking to rescue a divert and it just doesn’t happen all that often. The “system” works on things going right, not going wrong. GF But do you really n...

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by LDRA
Thu Jan 24, 2019 1:44 am
Forum: Civil Aviation
Topic: Updated: JAL takes delivery of its 1st Airbus (A350)
Replies: 170
Views: 6465

Re: JAL announces first A350 route

What is cycle life of A350-942? Did they order before availability of 787-10? 787-10 with its mono carbon fuselodge should have advantage on cycle life

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by LDRA
Tue Jan 22, 2019 5:03 pm
Forum: Civil Aviation
Topic: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang
Replies: 3188
Views: 595665

Re: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang

The technical information shared in this thread showed that the 737 design predate the deployment of aircraft ADIRU redundancy, as found in more recent design, and that the adaptation made in the various 737 iterations did keep the same *split sides" design. Implementing the MCAS function on t...

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by LDRA
Mon Jan 21, 2019 10:10 pm
Forum: Civil Aviation
Topic: ANA 787 suffers double engine failure on rollout
Replies: 35
Views: 16351

Re: ANA 787 suffers double engine failure on rollout

I'm really surprised this thread isn't blowing up. This is a HUGE issue. I don't care if it's a programming issue in the FADEC (unlikely) only related to ground ops, it's still going to have massive ramifications for the way software is coded, checked, certified, and employed. Of course there is a ...

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by LDRA
Mon Jan 21, 2019 9:53 pm
Forum: Civil Aviation
Topic: Airbus A220 Developments : more of a match for A320neo than Airbus says
Replies: 301
Views: 49355

Re: Airbus A220 Developments : more of a match for A320neo than Airbus says

A review of Engineering Job Openings at CSALP brought up the Airbus A220 site. Nearly all are listed as Airbus/Bombardier and nearly all cover "Perform sizing and support design activities for post-certification design activities." It appears that CSALP has engineering support for product...

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by LDRA
Wed Jan 16, 2019 4:19 pm
Forum: Civil Aviation
Topic: UA orders 4 More 777-300ERs - What Routes?
Replies: 52
Views: 12862

Re: UA orders 4 More 777-300ERs - What Routes?

What is the delivery schedule?

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by LDRA
Wed Jan 16, 2019 4:19 am
Forum: Civil Aviation
Topic: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang
Replies: 3188
Views: 595665

Re: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang

I am flying and the plane is getting hard to control, it wants to go nose down, the trim wheel keeps clicking intermittently, trimming down until I have trouble controlling, I'm not going to think "Nope, it's not continuous without a break, so even though I can't control this nose down trim I ...

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by LDRA
Wed Jan 16, 2019 12:15 am
Forum: Civil Aviation
Topic: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang
Replies: 3188
Views: 595665

Re: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang

Definitely hair splitting as far as I'm concerned. An uncommanded trim operation that is happening on a repeat interval is to be considered "continuous" as far as I'm concerned. there are a lot of trimm operations from flightcontrols all the time they start and they stop and then they sta...

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by LDRA
Tue Jan 15, 2019 11:52 pm
Forum: Civil Aviation
Topic: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang
Replies: 3188
Views: 595665

Re: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang

Every time they manually trimmed, MCAS got out of the way. When they got the airplane in trim and stopped manually trimming, MCAS would jump back in and trim the nose down. It's kind of hair-splitting, I would think, to say that this behavior means it didn't meet the requirements for the QRH proced...

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by LDRA
Tue Jan 15, 2019 11:11 pm
Forum: Civil Aviation
Topic: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang
Replies: 3188
Views: 595665

Re: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang

If you look at the FAA AD In the event an uncommanded nose down stabilizer trim is experienced on the 737-8/-9, in conjunction with one or more of the indications or effects listed below... It is the same the reason "in conjunction with one or more of the indications or effects listed below&quo...

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by LDRA
Tue Jan 15, 2019 11:03 pm
Forum: Civil Aviation
Topic: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang
Replies: 3188
Views: 595665

Re: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang

In what way was it stepped? Because they re-engaged flaps? Every time they manually trimmed, MCAS got out of the way. When they got the airplane in trim and stopped manually trimming, MCAS would jump back in and trim the nose down. It's kind of hair-splitting, I would think, to say that this behavi...

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by LDRA
Tue Jan 15, 2019 8:28 pm
Forum: Travel, Polls & Preferences
Topic: Which Chinese airline will order A330neo first?
Replies: 45
Views: 6027

Re: Which Chinese airline will order A330neo first?

Do they need NEO? If route is relatively short, CEO is more suitable. And they all have ordered or already operate 787 or A350 for long haul. Chinese airlines are not any different than other Asian A330 operators. They are all waiting for Boeing to firm up 797 specs before they decide what to do. W...

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by LDRA
Tue Jan 15, 2019 7:05 pm
Forum: Civil Aviation
Topic: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang
Replies: 3188
Views: 595665

Re: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang

Does running Boeing 737 Runaway Stab NNC procedure ALWAYS lead to cut out switch? Can someone post the page from QRH

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by LDRA
Tue Jan 15, 2019 4:19 am
Forum: Civil Aviation
Topic: Airbus A220 Receives ETOPS 180 Certification
Replies: 35
Views: 8442

Re: Airbus A220 Receives ETOPS 180 Certification

SteelChair wrote:
Amazed that they got it considering how little time in service has been accrued by the wildly unreliable PW GTF.


And KE just had a serious engine incident a few days ago...

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by LDRA
Mon Jan 14, 2019 9:18 pm
Forum: Travel, Polls & Preferences
Topic: Which Chinese airline will order A330neo first?
Replies: 45
Views: 6027

Re: Which Chinese airline will order A330neo first?

Do they need NEO? If route is relatively short, CEO is more suitable.

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by LDRA
Mon Jan 14, 2019 2:52 pm
Forum: Civil Aviation
Topic: DELTA and the A350
Replies: 6
Views: 1236

Re: DELTA and the A350

They are ordering 747-8. Only a four holer can replace a four holer :spin:

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by LDRA
Sat Jan 12, 2019 5:41 pm
Forum: Civil Aviation
Topic: Corporate traffic sneak peek: SFO-PVG tops list of UA’s most lucrative Apple routes
Replies: 130
Views: 19376

Re: Corporate traffic sneak peek: SFO-PVG tops list of UA’s most lucrative Apple routes

What kind of apple are they air freighting? Gala? Granny smith?

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by LDRA
Sat Jan 12, 2019 4:38 am
Forum: Civil Aviation
Topic: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang
Replies: 3188
Views: 595665

Re: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang

Again, to REACT to an aircraft system problem, you first has to DETECT a problem exist, even if you can't IDENTIFY the root failure causing the condition. The DETECTION CRITERIA for abnormal aircraft system condition simply does not exist exist in the procedure before the mishap What you don't unde...

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by LDRA
Sat Jan 12, 2019 2:52 am
Forum: Civil Aviation
Topic: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang
Replies: 3188
Views: 595665

Re: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang

Again, the detection criteria for MCAS unintended activate due to AOA failure were not made available to flight crews before mishap. So procedure to handle MCAS failure does not exist. The point of issuing AD is to update procedure Of what consequence is it knowing why the stabilizer trim has run a...

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by LDRA
Sat Jan 12, 2019 2:26 am
Forum: Civil Aviation
Topic: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang
Replies: 3188
Views: 595665

Re: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang

Again, the detection criteria for MCAS unintended activate due to AOA failure were not made available to flight crews before mishap. So procedure to handle MCAS failure does not exist. The point of issuing AD is to update procedure

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by LDRA
Sat Jan 12, 2019 2:23 am
Forum: Civil Aviation
Topic: How Many A 330 Neo's Will Ultimately be Sold?
Replies: 74
Views: 9128

Re: How Many A 330 Neo's Will Ultimately be Sold?

Chinese orders are heavily tied to politics. They order to balance trade deficit

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