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Lonewolf_50
July 14, 2025, 00:47:00 GMT permalink Post: 11921811 |
No, not really. How many times have you operated such a switch, as described in this thread?
Agree
in an era where pilot malfeasance is the single largest cause of deaths in RPT operations, this is inevitable Two reasons 1. Will have some deterrent value. With MH370 and here, we see some effort to create confusion and ambiguity rather than perform a simple act 2. Will aid investigation of further incidents (which are also inevitable) Just need to ask: are you involved in airline management? Last edited by Lonewolf_50; 14th July 2025 at 01:17 . Subjects: None |
Lonewolf_50
July 14, 2025, 02:26:00 GMT permalink Post: 11921829 |
I took the time to read the entire article. (It spent some time discussing how he balanced his work schedule with the need to take care of his aged father, and that he might be near the retirement decision point...).
Here are a few other bits from the article:
“He did take bereavement leave in 2022 following his mother’s death, and his medical records were submitted as part of the investigation, and the preliminary report did not find anything noteworthy,” he said.
![]()
The Indian Commercial Pilots’ Association said the crew of flight 171 had acted in line with their training and responsibilities under challenging conditions. It strongly rejected insinuations of malpractice, saying it was deeply disturbed by the speculation.
What were your takeaways from that article? Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Preliminary Report |
Lonewolf_50
July 14, 2025, 02:38:00 GMT permalink Post: 11921831 |
I think we'll need to agree to disagree, since those cameras won't prevent any accident (all they'll do is improve post mortems) but they will create a hostile work environment which is not healthy for corporate or flight deck culture. Your ref to MH370 is noted, and also not agreed either. Suggest you read up on how to stop terror attacks. The psychology of what is operating there is quite similar. The perp has the initiative. As to AF 447, the data from a sub-system provided some useful info (before the aircraft was found and then the FDR and CVR changed the story considerably) that was not intrusive. Subjects (links are to this post in the relevant subject page so that this post can be seen in context): CVR FDR |
Lonewolf_50
July 14, 2025, 15:11:00 GMT permalink Post: 11922287 |
Given the question was 'why', it seems equally plausible that it was the PF Kunder who transitioned the switches accidentally as part of some muscle memory blunder, and it was the PM Sabharwal who asked Kunder why he cutoff, who then replied that he didn't, because the fact he'd made the mistake hadn't registered.
Walk me through how and why that happened/happens. The training and CRM implications of what you propose are pretty serious...for that airline.
OTOH, it might just be a sloppy transcription.
Again, for me, this points to a blunder by Kunder.
![]() Why? (We had a similar switch on an aircraft I flew some decades ago, and if the spring wasn't working You Replaced The Switch!) Your previously expressed hypothesis - long sleeve cuff catching on them, and then one at a time this sleeve cuff pulling on each, and then (despite the physical sensation of catching on them and the CM checking to see what the hang up is) changing the position of the switches accidentally - could be easily tested in the simulator. The investigation team has had between 20 and 30 days to look into that possible explicit accidental switch triggering path. You seem wedded to it. Why? Do you believe that they have, or have not, considered it? (Part of the reason that I ask this is that the next expected hand movement would probably be forward, not aft, toward the gear handle to raise the gear, in anticipation of a positive rate of climb being called out since they just took off and the PF was setting the climb out attitude...) Last edited by Lonewolf_50; 14th July 2025 at 16:57 . Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Fuel (All) Fuel Cutoff Switches Muscle Memory |
Lonewolf_50
July 15, 2025, 12:24:00 GMT permalink Post: 11922888 |
Secondly, I can’t be the only one who has operated a control and then perceived an unexpected set of visual, audible or physical responses from something unrelated and instantly thought WTF have I just done followed by an immediate re-check of that action?
Although the initial report is notable for what it does not say I can’t see the flat denial of any action is what would be expected given the plethora of cues in that cockpit following the operation of the switches. the "WTF? Fix that!" instinct is pretty strong I have also seen people lower the flaps, rather than the gear, and despite a warning horn going off (and the indicators showing Gear Up) continue their approach to short final, reporting the gear down...and I've had to tell them to wave off/go around. Each of those events of course results in a debrief where one walks through "what was I thinking?" as a part of the conversation.
Spoiler
Was he even thinking about what he was doing? The takeoff seems to have been pretty standard, based on the info provided in the Interim Report, almost to the point of being routine. I have occasionally had my mind drift when I am doing something I have done many times before (and that's been getting worse as I've gotten older). Being in a cockpit / on the flight deck won't necessarily make anyone immune to that. Subjects: None |
Lonewolf_50
July 15, 2025, 18:12:00 GMT permalink Post: 11923148 |
For Dr Bru and Engineless:
I think that there is a thread about hacking of airliners somewhere on PPRuNe, might want to take that discussion there. (Here is one, there are others) A short response to you both: 1. Note that the article was from 2019 2. I am very doubtful that this occurred, beyond estimating the efficacy of any protections Boeing and Honeywell will have come up with since that article was published. I doubt that either company sat on their hands after that Black Hat conference. 3. Caveat: yes, hackers never sleep . = So some kind of sabotage is supposedly done, you think? = (I'll put the speculation into the spoiler)
Spoiler
But I think that you are both grasping at straws, for a variety of reasons, among which are: 1. No evidence to date. 2. Nothing in the report (but then, it's a prelim report) 3. If that kind of thing was going on, I don't think that the report would appear to lean so hard toward the human factors piece. 4. Unless that is part of the deception plan! ![]() 5. Yeah, right, we are back to the Hollywood thriller that neither of you have gotten a producer to try and get filmed. 6. Fear 7. Surprise 8. A fanatical devotion to Saint Bernoulli. Please take any further discussion of this line of inquiry to a thread involving hacking. Thank you all in advance. T28B (As an aside: if you took a look at the debris field, and the fact of the post impact fire, finding any evidence of something like what you are alluding to would be tough unless there's a way to parse EAFR information to detect the intrusion into the system of spurious / outside signals). Last edited by T28B; 15th July 2025 at 19:52 . Reason: Alert to move hacking discussion elsewhere Subjects (links are to this post in the relevant subject page so that this post can be seen in context): EAFR Honeywell Human Factors Preliminary Report |
Lonewolf_50
July 16, 2025, 12:47:00 GMT permalink Post: 11923713 |
I'll offer a guess as to why...later.
I'm completly certain that it can when the locking mechanism is not properly installed.
In such a case, the moving part of the lever could even stand on a "needle point position", meaning it's neither in the on or off position. Smallest movement of the aircraft or a hand can move the lever to on or off.
I also observed many pilots in my career holding their hand at the backstop of the thrust levers on the pedestal as PM. Comes from a certain mistrust to the other pilot (mostly captains do that). If this hand falls down by a gust or a bump on the runway, his hand falls down on the pedestal. Exact location of the cut-off switches. If the locking mechanism isn't installed, you don't even feel that you moved it. Has anyone demonstrated to you something like "watch this, Dani: if I pull the switch up and get it to hang on the little lock/cam, the engine will still start" ... in the sim or in the aircraft. I'd be interested to read of your experiences with that switch and that non-standard positioning of it that you describe. Beyond that, did you bother to look at the position of the fuel control switches that were in the preliminary report? They were found in the RUN position. See page ten of the preliminary report. Neither of them was cocked off, as in the picture of a misaligned switch from a 737 that you referred to.
You mean just because it never has happened, it's impossible? What a strange argument.
If you look closely at the picture in post no 262 Preliminary Air India crash report published I see a perfect example of a wrongly installed locking mechanism.
How on earth do you think this argument is unthinkable, when there are even safety bulletins and mandatory maintenance orders about this very problem?
I'm on neighter side. That's why facts are more important for me than for many others.
You have established no basis for why you believe that the switches on this 787 were incorrectly installed, given that
As to post deletions: as with some of mine being deleted, we both seem to get involved in the running rodent machine despite any intentions to avoid it. For DaveReidUK Your post is, at best, disingenuous. (But thank you for posting an excerpt from the bulletin ![]() The error was found on a 737, and the competent authority issued that alert having recognized that similar switches might have similar problems - they used the word potentia l - not because switches on all of those other models had been found to have that problem. From your subsequent post:
..to be replaced if found defective,
Given that this is the year 2025, (and the maintenance actions mentioned in the preliminary report) 1spotter's point on the "red herring" is a bit stronger than you allow. Please go back and read page 6 of the prelim report, top half. Something else to think upon: how many 737s does Air India operate?
As of June 2025, Air India operates a fleet of 190 aircraft, both narrowbody and widebody aircraft with a fleet composed of
Airbus A319
,
A320
,
A320neo
,
A321
,
A321neo
,
A350
as well as the
Boeing 777
and
Boeing 787
.
For the moment I don't think that it does, however, it might. The investigators have a variety of other rocks to turn over and see what crawls out from under them. They may find evidence of various maintenance issues that have an impact on this accident. As of today, though, such information has not been released (but I will offer you a guess that all of that is in the process of being collected and analyzed, even now, as a part of their investigation). Full disclosure: I don't fly Boeings, I do not work for Boeing, I have no shares in Boeing stock, and I am still slightly pissed at Boeing for the MCAS screw up on the 737-MAX. Last edited by Lonewolf_50; 16th July 2025 at 13:12 . Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Fuel (All) Fuel Cutoff Fuel Cutoff Switches Preliminary Report RUN/CUTOFF |
Lonewolf_50
July 16, 2025, 13:20:00 GMT permalink Post: 11923731 |
It's many things - often interrelated
It's Covid - which really screwed a lot of people up, and continues to do so. It's social isolation and working from home It's social media which can perpetuate extreme views It's inflation and cost of living pressures It's a falling standard of living - we are the first generation in centuries who will leave their children worse off It's that society is polarised on every axis - male V female, generational divides, racial disharmony, intolerance with those of a different political ideology, employer V employee, It's the 4th turning for those who subscribe to Neil Howe Society is not doing particularly well at moment. Pilots and aviation are part of that society. And yes, Pilots are subject to the toxicity of the modern, over-connected world as much as the rest of the population are. That might make compartmentalization tougher now than it was 30 years ago. How good were either of the pilots on this flight at compartmentalization? How does one measure that? (Obviously not answerable since they are both now dead). (Thanks for the tip about Howe, I have a trip coming up and could use some different reading material - been on a Greek / Persian history binge of late, need new material). Subjects: None |
Lonewolf_50
July 16, 2025, 14:11:00 GMT permalink Post: 11923749 |
I really don't get it why you oppose to the thought it could happen on any Boeing aircraft. Since they are all very similar switches. Maybe it's even possible to interchange some of them. There are so many errors a maintenance organization can make. Fake parts?
What really frightens me is that you and others resolutely block even to think about the possibility. Because, let's be honest, the probability is not zero (and I would say nearer to 1 than to 0). I have never moved such a switch, since I fly Airbus. But I'll offer you a concern I have for the position that you are taking. You have unwittingly made an presumption that in the last two years, see the maintenance actions referred to in the Prelim Report...
the scrutiny of maintenance records revealed that the throttle control module was replaced on VT-ANB in 2019 and 2023. However, the reason for the replacement was not linked to the fuel control switch. There has been no defect reported pertaining to the fuel control switch since 2023 on VT-ANB
This is a switch that actual 787 and 777 pilots, who have have participated in this thread, have confirmed requires dual confirmation during operation, and one that has been highlighted as 'of interest' based on the bulletin we have all discussed. But in Dani's world, the switch not working can be pressumed and the pilots never wrote it up because of {reasons}. What do you have against all of the flight deck crews of Air India, that you believe that they would neglect to write up a fuel control switch that isn't working properly? As an aside:
Spoiler
Have I ever moved the wrong switch? Yep. I think that reaching for a wrong switch with one's mind not quite on what one is doing is more likely than your "the switch wasn't working correctly" assertion / assumption, particularly given the position that they were found in at the crash site: latched in the RUN position). When I was still flying, if a switch in the cockpit, or a fastener for a cowling, wasn't working correctly I wrote it up. Whether or not the maintenance team fixed it immediately, or deferred the maintenance (based on the maintenance pubs), I wanted that on record so that (1) it would get fixed, and (2) to alert the next crew. I was taught that approach over 40 years ago. Last edited by Lonewolf_50; 16th July 2025 at 14:28 . Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Preliminary Report RUN/CUTOFF |
Lonewolf_50
July 16, 2025, 17:13:00 GMT permalink Post: 11923863 |
From the information so far available, the ones on the accident aircraft was not installed the wrong way, else the conclusion that they were in the RUN position would not be there. You don't have a theory, you don't have a hypothesis, you have an (as yet) unsupported assertion. Now, if a friend of your who works at Air India has sent you a text message, or spoken to you, and advised you privately that someone at that company had installed those switches improperly on that aircraft, then perhaps you can forward that info to the accident investigators (in whatever non attribution method you can figure out). Further that point: had the installation been faulty, or presented evidence of that, that fact would have been in the report because they found the switches intact (albeit somewhat worse off due to the post crash fire). See page 10 of the prelim, figure 13:
The thrust lever quadrant sustained significant thermal damage. Both thrust levers were found near the aft (idle) position. However, the EAFR data revealed that the thrust levers remained forward (takeoff thrust) until the impact. Both fuel control switch were found in the “RUN” position. (fig.13) The reverser levers were bent but were in the “stowed” position. The wiring from the TO/GA switches and autothrottle disconnect switches were visible, but heavily damaged"
But I'll throw you a bone: since I don't think that they have completed 100% all of their digging into the maintenance side of this, someone may turn up something odd before they issue a subsequent report, or the final report. Beyond that, thank you for your concise response to my overly long post. ![]() Last edited by Lonewolf_50; 16th July 2025 at 17:50 . Subjects (links are to this post in the relevant subject page so that this post can be seen in context): EAFR RUN/CUTOFF TOGA |