737 max loses window
Discussion
airbusA346 said:
Yikes!!! Look at the image in this tweet. 
https://twitter.com/ByERussell/status/174446013685...
It'll be interesting to know how many turns that bolt is in.
I doubt those are screws, far more likely to be bolts with nuts on the other side of the frame; Boeing management need taking to the cleaners over this. Utter failure of process control.https://twitter.com/ByERussell/status/174446013685...
It'll be interesting to know how many turns that bolt is in.
hidetheelephants said:
I doubt those are screws, far more likely to be bolts with nuts on the other side of the frame; Boeing management need taking to the cleaners over this. Utter failure of process control.
What ever it is going into they only look finger tight to me. I wonder if they are meant to be lock wired too.Maybe they need to do a D Check on some of them to see what else isn't right.
United have also found the loose bolts aren't the same ones across the 5 aircraft.
https://theaircurrent.com/feed/dispatches/united-f...
https://theaircurrent.com/feed/dispatches/united-f...
hidetheelephants said:
They've completely forgotten how to build aeroplanes, this is basic stuff; between this and the shambolic KC46 programme the company is a disgrace.
Exactly. Cutting costs & cutting corners in order to keep the shareholders happy & make sure the CEO gets his bonus, and never mInd the lives of passengers & crew. airbusA346 said:
I believe they got rid of a load of the people doing QC, and now rely on digital torque wrenches etc that log when bolts/nuts are tightened.
The whole area of Quality Control is fraught with difficulties. This dated October 2023 from the UK's Health and Safety Executive in connection with safety-critical welding of boilers and pipes in the energy industry,"This safety alert highlights that the non-destructive testing (NDT) process is vulnerable to tampering. HSE and other regulators have investigated several instances where NDT has been falsified. In particular, radiographic images of welds have been falsely obtained or tampered with, including duplicate images of welds and false identification numbers added after processing. In these cases there is a significant risk of flaws and defects going undetected with a subsequent risk of structural failure.
"Most recently, during a large-scale steam boiler construction which required hundreds of internal tube welds and thousands of radiograph images, instances of film duplication were noticed by the inspector. Further investigation revealed large-scale falsification of weld images and shortcuts taken to reduce the time spent on site."
https://www.hse.gov.uk/safetybulletins/radiography...
airbusA346 said:
Yikes!!! Look at the image in this tweet.
https://twitter.com/ByERussell/status/174446013685...
It'll be interesting to know how many turns that bolt is in.
If those are either plain or helical spring washers of the sort with a single split, then they can be worse than useless in equipment prone to vibration, as this vibration test rig demonstrates:https://twitter.com/ByERussell/status/174446013685...
It'll be interesting to know how many turns that bolt is in.
Plain & locking washers on a vibration test rig
It looks like the door plug had a nice soft landing
Edited by GliderRider on Tuesday 9th January 01:23
Panamax said:
The whole area of Quality Control is fraught with difficulties. This dated October 2023 from the UK's Health and Safety Executive in connection with safety-critical welding of boilers and pipes in the energy industry,
"This safety alert highlights that the non-destructive testing (NDT) process is vulnerable to tampering. HSE and other regulators have investigated several instances where NDT has been falsified. In particular, radiographic images of welds have been falsely obtained or tampered with, including duplicate images of welds and false identification numbers added after processing. In these cases there is a significant risk of flaws and defects going undetected with a subsequent risk of structural failure.
"Most recently, during a large-scale steam boiler construction which required hundreds of internal tube welds and thousands of radiograph images, instances of film duplication were noticed by the inspector. Further investigation revealed large-scale falsification of weld images and shortcuts taken to reduce the time spent on site."
https://www.hse.gov.uk/safetybulletins/radiography...
Steam boilers on airliners now? "This safety alert highlights that the non-destructive testing (NDT) process is vulnerable to tampering. HSE and other regulators have investigated several instances where NDT has been falsified. In particular, radiographic images of welds have been falsely obtained or tampered with, including duplicate images of welds and false identification numbers added after processing. In these cases there is a significant risk of flaws and defects going undetected with a subsequent risk of structural failure.
"Most recently, during a large-scale steam boiler construction which required hundreds of internal tube welds and thousands of radiograph images, instances of film duplication were noticed by the inspector. Further investigation revealed large-scale falsification of weld images and shortcuts taken to reduce the time spent on site."
https://www.hse.gov.uk/safetybulletins/radiography...
Alaska Airlines have found additional aircraft with 'loose hardware'.
https://news.alaskaair.com/alaska-airlines/operati...
https://news.alaskaair.com/alaska-airlines/operati...
airbusA346 said:
During the explosive decompression the cockpit door flew open. According to Boeing, it is designed to do this. Problem is the pilots did not know this and it isn't in the manuals.
Now where have we heard that before... MCAS!
So a hijacker just needs to depressurize the aircraft to access the super secure cockpit?Now where have we heard that before... MCAS!
Seven7 said:
airbusA346 said:
During the explosive decompression the cockpit door flew open. According to Boeing, it is designed to do this. MCAS!
What is the thinking behind that?MartG said:
Seven7 said:
airbusA346 said:
During the explosive decompression the cockpit door flew open. According to Boeing, it is designed to do this. MCAS!
What is the thinking behind that?xeny said:
Teddy Lop said:
You could easily implement vents for pressure equalisation while maintaining security though?
Then an attacker could potentially gas the pilots. Interesting set of security tradeoffs.Doesn't need to be a huge vent for the few m pocket of air in the cockpit, and can easily be one-way or pressure controlled.
The opposite pressure differential - with the hole in the cockpit and the rest of the jet wanting to vent - would be more of an issue but in that event access to the cockpit might be better anyway.
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