June 12, 2025, 16:15:00 GMT
permalink Post: 11899420
What is the precise trigger for the RAT to deploy automatically on the 787? Full failure of both engines?
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): RAT (All) RAT (Deployment)
June 12, 2025, 23:12:00 GMT
permalink Post: 11899824
I'm reminded a little of Emirates EK321, back in 2021, where the pilots left the MCP altitude setting at 0ft.
https://simpleflying.com/emirates-bo...-long-takeoff/
However, that would have nothing to do with the RAT deployment.
However, that would have nothing to do with the RAT deployment.
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): RAT (All) RAT (Deployment)
June 13, 2025, 17:28:00 GMT
permalink Post: 11900718
I believe the loud bang that survivor heard was a (BTB) Bus Tie Breaker short.
Based on the comments made by the passenger who travelled on the aircrafts previous sector, speaking about air conditioning that was going on and off, I think a faulty (CAC) Cabin Air Compressors may have contributed.
The B787 FCOM has information about the about only two of four CAC\x92s being used for ground operation, maybe B787 crew can confirm.
I am curious if the increased electrical demand of the CAC\x92s shortly after take-off somehow contributed to this potential short.
If such a short did occur then the next question would be how this may influence the engine controls, but given the 248 day AD for electrical issues, it could potentially affect the engines.
I was also surprised to learn that the B787 EICAS actually has a ENG THRUST caution, so not a totally unexplored issue.
Based on the comments made by the passenger who travelled on the aircrafts previous sector, speaking about air conditioning that was going on and off, I think a faulty (CAC) Cabin Air Compressors may have contributed.
The B787 FCOM has information about the about only two of four CAC\x92s being used for ground operation, maybe B787 crew can confirm.
I am curious if the increased electrical demand of the CAC\x92s shortly after take-off somehow contributed to this potential short.
If such a short did occur then the next question would be how this may influence the engine controls, but given the 248 day AD for electrical issues, it could potentially affect the engines.
I was also surprised to learn that the B787 EICAS actually has a ENG THRUST caution, so not a totally unexplored issue.
2015-09-22: Air compressor failure caused smoke in cabin and diversion for checks. Aircraft diverted to Kolkata for an emergency landing, returned to service same day after air compressor replaced.
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Air Worthiness Directives EICAS FCOM
June 13, 2025, 19:09:00 GMT
permalink Post: 11900821
Is it relevant ?
Seems to denote poorly maintained aircraft.
https://www.threads.com/@r.bharowal/...jcQdTrixV8PbWw
Seems to denote poorly maintained aircraft.
https://www.threads.com/@r.bharowal/...jcQdTrixV8PbWw
Subjects: None
June 13, 2025, 20:51:00 GMT
permalink Post: 11900889
Would it be reasonable to expect multiple CCTV videos, cf Jeju at Muan? I was surprised by how many videos became available after that sad crash.
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): CCTV
June 14, 2025, 16:36:00 GMT
permalink Post: 11901633
I read that the 'AAIB' will be investigating. I presume that's AAIB (India)? Do we know what facilities the AAIB (India) has for reading FDRs?
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): AAIB (All) AAIB (India)
June 14, 2025, 20:20:00 GMT
permalink Post: 11901800
I've been 'watching' flights take off from Ahmedabad on FR24. Assuming that the bold dots on the track are where FR24 gets some real transponder data, it looks as if flights become visible at take-off, then FR24 interpolates the track until roughly 800m/1km from the end of the runway when it gets the next 'real' data block. So all we can conclude is that the transponder stopped transmitting somewhere in the 8 - 10 seconds between take-off and 1km.
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): FlightRadar24
June 15, 2025, 14:37:00 GMT
permalink Post: 11902511
We're on the fourth day of this accident, and so far all that we - the public - have to go on is two grainy videos. I'm surprised that there haven't been more CCTV images and eye-witness accounts, especially in the middle of a city. I realise it was a very short flight, and didn't get high enough to be widely visible, but there seem to be a lot of buildings round there and it was early afternoon. Why so little information?
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): CCTV
June 15, 2025, 23:16:00 GMT
permalink Post: 11902947
What happens if the inputs are erroneous because of a mechanical or maintenance failure?
Subjects: None
June 16, 2025, 21:23:00 GMT
permalink Post: 11903810
May I just say that being locked out of the Pprune thread and left to the mercy of other sites, makes a person immensely grateful for Pprune.
Subjects: None
June 17, 2025, 14:06:00 GMT
permalink Post: 11904327
Clearly the quote does not come from someone within the investigation, so what is reported can't be taken as any authoritative voice of any kind.
Not only that, but 'an official, a former Air India captain', unnamed, 'trained by the Captain of the accident flight...' being quoted in an article which contains known inaccuracies such as that the aircraft used more runway than usual, continues to misquote the survivor, and adds that the 'ELT has been recovered' (which doesn't seem at all relevant)....
Hardly a trustworthy source of accurate information.
Not only that, but 'an official, a former Air India captain', unnamed, 'trained by the Captain of the accident flight...' being quoted in an article which contains known inaccuracies such as that the aircraft used more runway than usual, continues to misquote the survivor, and adds that the 'ELT has been recovered' (which doesn't seem at all relevant)....
Hardly a trustworthy source of accurate information.
Subjects: None
June 19, 2025, 07:38:00 GMT
permalink Post: 11905799
There seem to be issues with the evaluation due to damages. Cannot assess the reliability of the source.
https://weeklyvoice.com/damaged-blac...medium=twitter
https://weeklyvoice.com/damaged-blac...medium=twitter
Subjects: None
June 19, 2025, 21:06:00 GMT
permalink Post: 11906372
In the ANA 787-8 incident, I think they couldn't restart the engines in order to taxi? Is that also a feature of TCMA?
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Relight
June 19, 2025, 22:34:00 GMT
permalink Post: 11906450
*On the ground* you get into a latched state, once TCMA deploys: after activation the relays stay latched to prevent a re-runaway. A full power reset of the affected EEC channel(s) and relay logic - normally done only at the gate - is required before fuel can flow again. So you can\x92t easily relight.
Technically, then, if TCMA deployed erroneously during takeoff, there would be no way for the pilots to restart the engines?
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Fuel (All) Relight
June 21, 2025, 13:57:00 GMT
permalink Post: 11907776
The situation with reading the flight recorders seem increasingly suspicious to me. As of yesterday, they're still dithering about whether to send them to the USA? Is this about India not wanting to reveal their smart new facility can't do the job? Or unwillingness to trust the US/Boeing? Or some other kind of argument? It seems ridiculous to me that no decision has been made about the boxes nine days after the crash and the rapidly discovered recorders.
India to decide on overseas analysis of Air India crash flight recorders
India to decide on overseas analysis of Air India crash flight recorders
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): DFDR
June 29, 2025, 19:49:00 GMT
permalink Post: 11913191
I've been travelling without access to internet, but I came across this video a few days ago. I don't know anything about the three guys, but they're apparently retired air accident investigators.
They seem to think that some of the EAFR data is now in the US. Is that actually the case?
They seem to think that some of the EAFR data is now in the US. Is that actually the case?
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): EAFR
June 29, 2025, 20:30:00 GMT
permalink Post: 11913209
Nobody here could answer that, but since the authorities in India have said the recorders themselves are there and not going anywhere, I would guess that
if
any data has been downloaded and shared outside the country, it will be for specific analysis purposes - GE for example.
There's no credible reasons 'three former accident investigators' in the US would have any direct knowledge, and if any third party in the US has been provided access to data, it will have been on the basis that it is not shared. Even that I would doubt, since involved parties are far more likely to already be in India as part of the investigation.
There's no credible reasons 'three former accident investigators' in the US would have any direct knowledge, and if any third party in the US has been provided access to data, it will have been on the basis that it is not shared. Even that I would doubt, since involved parties are far more likely to already be in India as part of the investigation.
As I said, I've been out of the loop for a few days. Do we know if the wreckage is being reconstructed in a warehouse, or whatever? I appreciate there may not have been that much left to reassemble, but the was at least one wing, a tail section, and the wing box section that the chap managed to escape from.
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): FDR
July 01, 2025, 10:07:00 GMT
permalink Post: 11914158
One of the things I've learned on this thread is that planes landing with the RAT deployed may be rare, but it does happen. The videos I've watched suggest that the engines were usually running as the plane landed, but of course the RAT can't be un-deployed in flight.
My question is: what caused the RAT to deploy on those flights? Presumably reports have to be submitted in those cases?
My question is: what caused the RAT to deploy on those flights? Presumably reports have to be submitted in those cases?
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): RAT (All) RAT (Deployment)
July 09, 2025, 14:52:00 GMT
permalink Post: 11918440
Do the switches make an audible clicking sound, ie one that would be picked up by the cockpit recorders?
Subjects: None
July 09, 2025, 18:40:00 GMT
permalink Post: 11918572
Theory alert : If you don\x92t have, or delete the cruise altitude in the FMC the aircraft will command a level off at 400ft, with the thrust levers reducing thrust significantly (I\x92ve seen it in the sim and happened at least once for real to my operator). It\x92s easy to do when loading the descent winds if you hit the wrong button. Could this have been confused with a loss of thrust?
And I would say the cut off switches do make a fairly unique click when being moved - I can hear it in my head as I write this!
And I would say the cut off switches do make a fairly unique click when being moved - I can hear it in my head as I write this!
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): CVR FDR Fuel (All) Fuel Cutoff Switches