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Icarus2001
June 16, 2025, 09:28:00 GMT permalink Post: 11903310 |
Therefore I expect the recorder/s will only be read today or tomorrow. So "if there was a major issue they would know by now" is unlikely
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Dual engine failure is very unlikely to occur but this seems increasingly to be the case here. Possibly there was a single engine failure followed by shutting down the remaining engine by mistake, if this happened it wouldn't be the first time.
​​​​​​​Is there any yaw or rudder deflection in any videos? Last edited by Icarus2001; 16th June 2025 at 09:41 . Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Dual Engine Failure EAFR Engine Failure (All) |
Icarus2001
June 13, 2025, 05:11:00 GMT permalink Post: 11903710 |
An engine failure just off the runway after V1 in a fully loaded 787-8 in high ambient temperatures would assuredly have a crew thinking about a "toute suite" shutdown of a misbehaving donk
This is a transport category aircraft. It will happily climb on one engine to a safe altitude where procedures are followed. There is zero evidence of any engine "failures" or shutdowns by the crew. However the gear is still down at around 500' agl. Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Engine Failure (All) V1 |
Icarus2001
June 16, 2025, 00:29:00 GMT permalink Post: 11903729 |
AFAIK
the 787 DFDRs have an internal battery but if the power is off to the rest of the aeroplane, what data, if any, is going to make its way to the units?
It has been established that the B787 utilises a EAFR, a combined CVR and DFDR. Subjects (links are to this post in the relevant subject page so that this post can be seen in context): CVR DFDR EAFR MAYDAY |
Icarus2001
June 16, 2025, 09:28:00 GMT permalink Post: 11903754 |
Therefore I expect the recorder/s will only be read today or tomorrow. So "if there was a major issue they would know by now" is unlikely
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Dual engine failure is very unlikely to occur but this seems increasingly to be the case here. Possibly there was a single engine failure followed by shutting down the remaining engine by mistake, if this happened it wouldn't be the first time.
​​​​​​​Is there any yaw or rudder deflection in any videos? Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Dual Engine Failure EAFR Engine Failure (All) |
Icarus2001
June 17, 2025, 12:43:00 GMT permalink Post: 11904270 |
The RAT provides hydraulic power only to the flight control portion of the C hydraulics
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Generators/Alternators Hydraulic Failure (All) RAT (All) RAT (Electrical) |
Icarus2001
June 17, 2025, 14:35:00 GMT permalink Post: 11904353 |
We know there was likely simultaneous dual engine failure very near Vr.
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Dual Engine Failure Engine Failure (All) |
Icarus2001
June 18, 2025, 04:38:00 GMT permalink Post: 11904900 |
But likewise, the engines can't have failed much before rotation:
The aircraft climb rate decreases, it descends, it crashes. Maybe the RAT was out. That is all we know. Last edited by Senior Pilot; 18th June 2025 at 07:09 . Reason: Remove quote from deleted post plus throttle comment Subjects (links are to this post in the relevant subject page so that this post can be seen in context): RAT (All) |
Icarus2001
June 18, 2025, 05:51:00 GMT permalink Post: 11904932 |
I wonder if it's safe to say they have not found something obviously wrong with the aircraft, as by now, if that was the case, grounding or enhanced checks would have been announced.
Every day that passes with no Boeing or GE bulletins reduces the chance of a design issue and suggests maintenance or operational error. Subjects: None |
Icarus2001
June 18, 2025, 13:43:00 GMT permalink Post: 11905264 |
True, but it took Boeing 4 months to ground Max 8's, three days after, and only because of, the second fatal accident.
That is why it took two crashes. I think if there was a design failure here we would know about it by now. As the Zen master said, we will see. Subjects: None |
Icarus2001
June 19, 2025, 09:21:00 GMT permalink Post: 11905858 |
Air India plane crash: Black box of 787 Dreamliner to be sent to US for data recovery; ‘recorders sustained heavy damage…’
Seems a long while to wait to send it to the US.
would the logic have a brain fart and revert back to HOLD?
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At what point before impact that power was lost, we do not know.
Someone made a radio call near the end of the flight, so some power was available. Subjects (links are to this post in the relevant subject page so that this post can be seen in context): EAFR MAYDAY |
Icarus2001
June 20, 2025, 04:45:00 GMT permalink Post: 11906589 |
it will likely require a forensic teardown of the control systems of the engine to determine what damage may have occurred before impact.
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): EAFR |
Icarus2001
June 20, 2025, 09:04:00 GMT permalink Post: 11906745 |
Back in my commuter days more than one Captain at the layover hotel got a sudden call from ops that
left an RJ engine running
before they departed the airport
If the other one is severely damaged we might as well end up with NO EAFR data from the critical last part of the flight
The EAFR will soon tell us WHAT happened but perhaps not WHY just yet. Subjects (links are to this post in the relevant subject page so that this post can be seen in context): EAFR |
Icarus2001
June 21, 2025, 01:15:00 GMT permalink Post: 11907429 |
so it's not clear who has primacy in the investigation any more.
Under ICAO rules the AAIB has lead on this. It was an Indian registered aircraft that crashed in India, how could they not be? The aviation minister ordered a “high level” investigation in to the accident. This is politics only.
NEW DELHI, June 15 (Xinhua) -- India's federal civil aviation minister Ram Mohan Naidu Kinjarapu Saturday said keeping in view the utmost seriousness of the incident, another high-level committee has been formed to probe the deadly plane crash in the western state of Gujarat.
The committee, according to Kinjarapu, will be headed by the home secretary and will submit its report in three months. If the aviation minister understood his portfolio he would know that the AAIB and DGCA are the accountable and responsible agencies here. Watch carefully. Subjects (links are to this post in the relevant subject page so that this post can be seen in context): AAIB (All) DGCA EAFR ICAO |
Icarus2001
June 21, 2025, 01:26:00 GMT permalink Post: 11907434 |
I view the MCAS events (personally) as 80% training/ORM/MX/ reaction and 20% hardware/Boeing failure (don`t mean to be callous or judgmental; Lord knows I`ve made my mistakes and am lucky to still be on the planet). While it`s culpable that Boeing never mentioned it (and that`s way wrong) it really didn`t differ from any other runaway trim scenario.
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But I just can`t get my arms around (right now) how a jet fueled by the same manifold as several other jets, devoid of any other major fuel systems issues, ETOPS certified, having a relatively clean history (maintaining its ETOPS), no OTHER software bugs being reported across the fleet nor any other unscheduled or abrupt engine shutdowns—or cascading electrical failures— (operating at conditions from -40 to +45 in all weather conditions) can have both engines just quit.
Subjects: None |
Icarus2001
June 21, 2025, 01:45:00 GMT permalink Post: 11907438 |
Originally Posted by
FrequentSLF
SLF here, With what might be a stupid question, however let me ask. Why the ground logic does not incorporate the wheel up command? Because many normal functions require knowing airborne or on the ground. The most obvious being gear retraction and in-flight braking of the spinning wheels, but there’s dozens of actions dependent on WOW. Because there are some times that the gear is left down after take-off for operational reasons. An automatic retraction is not desirable because the PF needs to know there is a positive rate of climb before calling for gear up, lest the beast settle back on to runway. Have a look at Emirates in Dubai… https://en.wikipedia.org/wiki/Emirates_Flight_521 This was a go round accident but the positive rate principle is the same. Subjects: None |
Icarus2001
June 21, 2025, 07:20:00 GMT permalink Post: 11907542 |
Only a reset of the Altitude Module or manual override of the Auto Trust would overcome this uncommented descent.
So no, the AAI does not need to be changed to commence a climb.
Where the meme has come from that jet pilots have to shut down engines as quickly as possible I don’t know but it is incorrect.
Last edited by Icarus2001; 21st June 2025 at 07:27 . Reason: Fat fingers. Subjects (links are to this post in the relevant subject page so that this post can be seen in context): EFATO Engine Failure (All) |
Icarus2001
June 21, 2025, 08:26:00 GMT permalink Post: 11907575 |
I am only asking about an engine failure memory item. Fire, separation or severe damage being a different beast.
Are you confirming that there is no specific engine failure memory item? When safe run the QRH?
so it would be extremely unlikely this crew actually got the stage of touching a fuel control switch.
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Engine Failure (All) |
Icarus2001
June 21, 2025, 12:13:00 GMT permalink Post: 11907696 |
Do any of you engineers know if these engines were tested at these rather unusual atmospheric conditions of ISA+30C at 1000 hPa
Subjects: None |
Icarus2001
June 22, 2025, 06:23:00 GMT permalink Post: 11908302 |
Constructing ever more unlikely cascading failures to fit the very few known facts is unproductive.
Of more interest to me is the lack of word on the plan to interrogate the EAFR units. Where and when? Also that the DGCA wants THREE managers removed from their positions at Air India. Unconnected to this accident however. Imagine Qantas being told by CASA to do a similar thing, or BA by the CAA, amazing stuff. Subjects (links are to this post in the relevant subject page so that this post can be seen in context): DGCA EAFR |
Icarus2001
June 22, 2025, 07:13:00 GMT permalink Post: 11908312 |
Another point pointing to that the aircraft did consider itself being ”In Air” is the ADS-B data sending Altitude from the first 575 feet
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): ADSB |