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Air India Express 737 Hits ILS, Damages Wall on Departure, Flies for 4 Hours

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111–120 of 255 posts

Re: Air India Express 737 Hits ILS, Damages Wall on Departure, Flies for 4 Hours

#111

The AVherald article: http://avherald.com/h?article=4bedd321&opt=0 As some of the others have mentioned, the reason the plane survived is likely because that was not a pressurised area. If it had breached the pressure vessel they would've noticed it very quickly (lack of pressurisation).

Not really - If there had a been a gash in pressurization, they would have caught it on the way up. The 737 is a _tank_. It has more or less the same wing load as a F-16. It takes a lot to shake around - it's every bit the 1950s build 707 chassis, and like the old 50s lathe - it can take a hit and keep going.

Don't the NGs have a nasty habit of splitting in two on hard landings (KI172, 4C8250, BW523, JT904, AA331)?

Re: Air India Express 737 Hits ILS, Damages Wall on Departure, Flies for 4 Hours

#112

The AVherald article: http://avherald.com/h?article=4bedd321&opt=0 As some of the others have mentioned, the reason the plane survived is likely because that was not a pressurised area. If it had breached the pressure vessel they would've noticed it very quickly (lack of pressurisation).

Not really - If there had a been a gash in pressurization, they would have caught it on the way up. The 737 is a _tank_. It has more or less the same wing load as a F-16. It takes a lot to shake around - it's every bit the 1950s build 707 chassis, and like the old 50s lathe - it can take a hit and keep going.

Plenty of 737's have had explosive depressurization with injuries or fatalities, most recently this year

https://www.bbc.com/news/world-us-canada-43818752

and one of the most famous incidents (in the U.S.)

https://en.wikipedia.org/wiki/Aloha_Airlines_Flight_243

Both were from fatigue, but fatigue doesn't have to be a gradual thing; it could come from a single hit that causes the pressure vessel to fail at altitude.

See the whole list here

https://en.wikipedia.org/wiki/Uncontrolled_decompression#Not...

Re: Air India Express 737 Hits ILS, Damages Wall on Departure, Flies for 4 Hours

#113
post #107

Earlier quoted context omitted.

Unfortunately don’t have time for a long post at the moment, but as an airline pilot and instructor/check pilot, I can say that extreme incompetence exists in the airline world, especially in Africa, India, SE Asia. There could be some very good reasons that they chose to continue, and often I learn those reasons when the facts are released, discovering that a good decision was made. I’ll be following the investigati…

--I can say that extreme incompetence exists in the airline world, especially in Africa, India, SE Asia including Hong Kong?

No, plus that's not what he said.

Re: Air India Express 737 Hits ILS, Damages Wall on Departure, Flies for 4 Hours

#114
post #108

Earlier quoted context omitted.

My, what a broad brush you have. With of course no ‘time’ to back it up with facts.

Some facts: Hull loss rates by region of operator per million departures (Jet / Turboprop) 2012-2016: [0] - 2.21 / 7.38 Africa - 1.17 / 20.59 CIS - 0.74 / 3.42 Middle East / North Africa - 0.53 / 1.55 Latin America / Caribbean - 0.48 / 1.45 Asia Pacific - 0.22 / 0.98 North America - 0.14 / 0.73 Europe - 0.00 / 8.73 North Asia India falls below Myanmar, Nepal, Pakistan in air safety audit [1] >The audit — ICAO Univers…

I appreciate the hull-loss facts, but do they directly support "pilot incompetence"? I've read enough NTSB reports to know it's usually multiple congruent factors (aircraft maintenance, organisational culture, pilot work-load).

Re: Air India Express 737 Hits ILS, Damages Wall on Departure, Flies for 4 Hours

#115

Earlier quoted context omitted.

Ugh, there have been Cessna deaths caused the same way. It's my least favorite failure mode to think about, since there's no obvious way to correct. In a Cessna, best you can do is release the yoke and tiptoe on to the rudders, but professional instructors have still died when this happens to them, since low altitude errors are often not correctable by the time you've lost too much altitude. Usually there ought to be…

In contrast, I can't say I've ever heard of seats in cars having this problem. Is it because plane seats are highly optimised for weight?

If your car seat slides back unexpectedly, the most likely problem will be a decreased ability to press down in the accelerator. The seat would generally slide back only under forwards acceleration. Under braking the seat would slide forward giving positive pressure onto the brake pedal.

Re: Air India Express 737 Hits ILS, Damages Wall on Departure, Flies for 4 Hours

#116
post #112

Earlier quoted context omitted.

Not really - If there had a been a gash in pressurization, they would have caught it on the way up. The 737 is a _tank_. It has more or less the same wing load as a F-16. It takes a lot to shake around - it's every bit the 1950s build 707 chassis, and like the old 50s lathe - it can take a hit and keep going.

Plenty of 737's have had explosive depressurization with injuries or fatalities, most recently this year https://www.bbc.com/news/world-us-canada-43818752 and one of the most famous incidents (in the U.S.) https://en.wikipedia.org/wiki/Aloha_Airlines_Flight_243 Both were from fatigue, but fatigue doesn't have to be a gradual thing; it could come from a single hit that causes the pressure vessel to fail at altitude. S…

And yet, it landed!

Re: Air India Express 737 Hits ILS, Damages Wall on Departure, Flies for 4 Hours

#117

Earlier quoted context omitted.

Ugh, there have been Cessna deaths caused the same way. It's my least favorite failure mode to think about, since there's no obvious way to correct. In a Cessna, best you can do is release the yoke and tiptoe on to the rudders, but professional instructors have still died when this happens to them, since low altitude errors are often not correctable by the time you've lost too much altitude. Usually there ought to be…

In contrast, I can't say I've ever heard of seats in cars having this problem. Is it because plane seats are highly optimised for weight?

My wife knows of two fatal car accidents caused by this. Don't adjust your seat whilst driving peeps, and make sure it clicked into position before you drive if you adjust it.

Re: Air India Express 737 Hits ILS, Damages Wall on Departure, Flies for 4 Hours

#118
post #108

Earlier quoted context omitted.

Some facts: Hull loss rates by region of operator per million departures (Jet / Turboprop) 2012-2016: [0] - 2.21 / 7.38 Africa - 1.17 / 20.59 CIS - 0.74 / 3.42 Middle East / North Africa - 0.53 / 1.55 Latin America / Caribbean - 0.48 / 1.45 Asia Pacific - 0.22 / 0.98 North America - 0.14 / 0.73 Europe - 0.00 / 8.73 North Asia India falls below Myanmar, Nepal, Pakistan in air safety audit [1] >The audit — ICAO Univers…

I appreciate the hull-loss facts, but do they directly support "pilot incompetence"? I've read enough NTSB reports to know it's usually multiple congruent factors (aircraft maintenance, organisational culture, pilot work-load).

“extreme incompetence exists in the airline world” does not equal “pilot incompetence” but would rather include aircraft maintenance, organizational culture, ... So the facts support the statement perfectly well.

Re: Air India Express 737 Hits ILS, Damages Wall on Departure, Flies for 4 Hours

#119

Question for professional pilots here: does this feel like normal behaviour for a pilot? From my limited experience of pilots, this seems entirely unlike the kind of behaviour you'd expect - they're usually conservative when it comes to safety or is that just the projected image to reassure the public?!

Unfortunately don’t have time for a long post at the moment, but as an airline pilot and instructor/check pilot, I can say that extreme incompetence exists in the airline world, especially in Africa, India, SE Asia. There could be some very good reasons that they chose to continue, and often I learn those reasons when the facts are released, discovering that a good decision was made. I’ll be following the investigati…

More like Air India in specific. Other Indian airlines are pretty good.

Re: Air India Express 737 Hits ILS, Damages Wall on Departure, Flies for 4 Hours

#120
post #115

Earlier quoted context omitted.

In contrast, I can't say I've ever heard of seats in cars having this problem. Is it because plane seats are highly optimised for weight?

If your car seat slides back unexpectedly, the most likely problem will be a decreased ability to press down in the accelerator. The seat would generally slide back only under forwards acceleration. Under braking the seat would slide forward giving positive pressure onto the brake pedal.

It also diminishes your ability to brake. And if you do slide back, and the seat then locks in place, that could be serious.
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