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DTA
July 17, 2025, 13:32:00 GMT
permalink Post: 11924368

Quote:

Originally Posted by 1stspotter

This would be the first time then a switch transitioned by itself from RUN to CUTOFF while there are two mechanisms to prevent such an uncommanded transition. The spring plus the little bridge.
Also it would be the first time a pilot does not recognize this ghost movement and needs 10 seconds before he sets the switches back to RUN.
It would be the first time such switches remain in RUN even after the forces of a crash.

The spring and gate/bridge together are the single mechanism that prevents uncommanded operation of the switch. Neither works without the other.

Subjects RUN/CUTOFF

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DTA
November 08, 2025, 06:57:00 GMT
permalink Post: 11985146

The BBC have a report today:

Quote:

Blame game over Air India crash goes on
Nearly five months after a plane crash in India which killed 260 people, the investigation has become mired in controversy – with the country's Supreme Court the latest to weigh in.

An interim report was released in July, but critics argue it unfairly focused on the actions of the pilots, diverting attention away from a possible fault with the aircraft.

On Friday, a judge in India's Supreme Court insisted that nobody could blame the aircraft's captain.

His comments came a week after the airline's boss insisted there was no problem with the aircraft.

Blame game over Air India crash goes on

Subjects BBC

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DTA
December 24, 2025, 06:16:00 GMT
permalink Post: 12010261

Yes, this would be two identical failures (bit flips) in two identical physically separate systems. The chances of the single failures are vanishingly small, though possible as seen in the A320 incident. Two together are near enough impossible.

Subjects: None

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DTA
February 03, 2026, 11:36:00 GMT
permalink Post: 12031533

The BBC have this story now.

https://www.bbc.co.uk/news/articles/c8e5zwndddyo

Quote:

Air India has grounded a Boeing 787-8 Dreamliner jet after one of its pilots reported a possible defect in the aircraft's fuel control switch.

The airline said in a statement on Monday that it had informed India's aviation regulator about the issue and that it was getting the pilot's concerns checked on a "priority basis".

"We are in contact with Air India and are supporting their review of this matter," a Boeing spokesperson said in response to an email.

On Tuesday, Reuters news agency reported, external that Air India had begun re-checking the fuel switches on its Boeing Dreamliner aircraft following the incident flagged by the pilot.

Subjects BBC Fuel (All) Fuel Cutoff Switches

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DTA
February 03, 2026, 13:55:00 GMT
permalink Post: 12031609

Quote:

Originally Posted by Fursty Ferret

This is - in my opinion, I must stress - an incredibly clumsy move by an Air India pilot. I think the impartiality of the investigation was always dubious, and now even more so.

I can just about conceive of a case where someone did this on engine start and the switch flicked to cut-off with the thumping of the nose wheel over a rough runway. Do I believe that it could happen simultaneously to both switches? No.

Simultaneously would be more credible/possible than 1 second apart as it actually happened.

Subjects Fuel (All) Fuel Cutoff Switches

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DTA
February 03, 2026, 20:16:00 GMT
permalink Post: 12031825

Quote:

Originally Posted by Musician

I really, really want to see a better report on this.

Obviously I have no idea if this is true. I just want to give an example of how that switch might be operated one way to be unsafe, and another way to be safe. I'd really want to see Boeing's take on this, and not a third-hand press release that went from Boeing to Air India engineering to ??? to the ministry. It may say something impossible that differs from the possible thing the engineers actually found.

If there was some contamination on the inner part of the switch toggle (dried coffee, coke etc) it is possible that the toggle would not reliably retract into the locking condition. Operating the toggle might temporarily clear that too.

Subjects: None

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DTA July 17, 2025, 13:32:00 GMT permalink Post: 11924368	Quote: Originally Posted by 1stspotter This would be the first time then a switch transitioned by itself from RUN to CUTOFF while there are two mechanisms to prevent such an uncommanded transition. The spring plus the little bridge. Also it would be the first time a pilot does not recognize this ghost movement and needs 10 seconds before he sets the switches back to RUN. It would be the first time such switches remain in RUN even after the forces of a crash. The spring and gate/bridge together are the single mechanism that prevents uncommanded operation of the switch. Neither works without the other. Subjects RUN/CUTOFF Links are to this post in the relevant subject page so that this post can be seen in context. 1 recorded likes for this post. Reply to this quoting this original post. You need to be logged in. Not available on closed threads.
DTA November 08, 2025, 06:57:00 GMT permalink Post: 11985146	The BBC have a report today: Quote: Blame game over Air India crash goes on Nearly five months after a plane crash in India which killed 260 people, the investigation has become mired in controversy – with the country's Supreme Court the latest to weigh in. An interim report was released in July, but critics argue it unfairly focused on the actions of the pilots, diverting attention away from a possible fault with the aircraft. On Friday, a judge in India's Supreme Court insisted that nobody could blame the aircraft's captain. His comments came a week after the airline's boss insisted there was no problem with the aircraft. Blame game over Air India crash goes on Subjects BBC Links are to this post in the relevant subject page so that this post can be seen in context. No recorded likes for this post (could be before pprune supported 'likes'). Reply to this quoting this original post. You need to be logged in. Not available on closed threads.
DTA December 24, 2025, 06:16:00 GMT permalink Post: 12010261	Yes, this would be two identical failures (bit flips) in two identical physically separate systems. The chances of the single failures are vanishingly small, though possible as seen in the A320 incident. Two together are near enough impossible. Subjects: None 1 recorded likes for this post. Reply to this quoting this original post. You need to be logged in. Not available on closed threads.
DTA February 03, 2026, 11:36:00 GMT permalink Post: 12031533	The BBC have this story now. https://www.bbc.co.uk/news/articles/c8e5zwndddyo Quote: Air India has grounded a Boeing 787-8 Dreamliner jet after one of its pilots reported a possible defect in the aircraft's fuel control switch. The airline said in a statement on Monday that it had informed India's aviation regulator about the issue and that it was getting the pilot's concerns checked on a "priority basis". "We are in contact with Air India and are supporting their review of this matter," a Boeing spokesperson said in response to an email. On Tuesday, Reuters news agency reported, external that Air India had begun re-checking the fuel switches on its Boeing Dreamliner aircraft following the incident flagged by the pilot. Subjects BBC Fuel (All) Fuel Cutoff Switches Links are to this post in the relevant subject page so that this post can be seen in context. No recorded likes for this post (could be before pprune supported 'likes'). Reply to this quoting this original post. You need to be logged in. Not available on closed threads.
DTA February 03, 2026, 13:55:00 GMT permalink Post: 12031609	Quote: Originally Posted by Fursty Ferret This is - in my opinion, I must stress - an incredibly clumsy move by an Air India pilot. I think the impartiality of the investigation was always dubious, and now even more so. I can just about conceive of a case where someone did this on engine start and the switch flicked to cut-off with the thumping of the nose wheel over a rough runway. Do I believe that it could happen simultaneously to both switches? No. Simultaneously would be more credible/possible than 1 second apart as it actually happened. Subjects Fuel (All) Fuel Cutoff Switches Links are to this post in the relevant subject page so that this post can be seen in context. 2 recorded likes for this post. Reply to this quoting this original post. You need to be logged in. Not available on closed threads.
DTA February 03, 2026, 20:16:00 GMT permalink Post: 12031825	Quote: Originally Posted by Musician I really, really want to see a better report on this. Obviously I have no idea if this is true. I just want to give an example of how that switch might be operated one way to be unsafe, and another way to be safe. I'd really want to see Boeing's take on this, and not a third-hand press release that went from Boeing to Air India engineering to ??? to the ministry. It may say something impossible that differs from the possible thing the engineers actually found. If there was some contamination on the inner part of the switch toggle (dried coffee, coke etc) it is possible that the toggle would not reliably retract into the locking condition. Operating the toggle might temporarily clear that too. Subjects: None 1 recorded likes for this post. Reply to this quoting this original post. You need to be logged in. Not available on closed threads.

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