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How many 'G' can an aeroplane stand?

Posted: Thu Dec 09, 2021 10:42 am
by Boac
Interesting development in the US from the FAA: From 'The Register' https://www.theregister.com/2021/12/08/ ... erference/

One wonders what effect a mobile phone in the 5g band would have on board.....................

Re: How many 'G' can an aeroplane stand?

Posted: Thu Dec 09, 2021 3:44 pm
by PHXPhlyer
I have the ADs pulled up in another tab from last night but it looks like more than I want to wade through.
Here they are if anyone has more ambition than I have.

https://www.faa.gov/sites/faa.gov/files ... 69-T-D.pdf

PP

Re: How many 'G' can an aeroplane stand?

Posted: Mon Dec 13, 2021 3:57 pm
by AtomKraft
More than 5.5 G in the case of P4-KHJ....altnough it never flew again.
Embraer 190 is tougher than you might expect.

Re: How many 'G' can an aeroplane stand?

Posted: Mon Dec 13, 2021 4:06 pm
by PHXPhlyer
AtomKraft wrote:
Mon Dec 13, 2021 3:57 pm
More than 5.5 G in the case of P4-KHJ....altnough it never flew again.
Embraer 190 is tougher than you might expect.
AK:
Link please.

PP

Re: How many 'G' can an aeroplane stand?

Posted: Mon Dec 13, 2021 7:49 pm
by AtomKraft
PHX

Here you go.



I've seen the Tech log for this a/c and it never flew again. It was a CRM study at AA and peak G was 5.5. It was a wild ride...

Re: How many 'G' can an aeroplane stand?

Posted: Mon Dec 13, 2021 8:51 pm
by PHXPhlyer
THX

PP

Re: How many 'G' can an aeroplane stand?

Posted: Tue Dec 14, 2021 10:31 am
by Ex-Ascot
Some very skillful piloting there. What a nightmare.

Re: How many 'G' can an aeroplane stand?

Posted: Tue Dec 14, 2021 12:49 pm
by Rossian
A general Q from a non pilot. During the checks after engine start on a civil a/c, does the "crew chief" watch the control surfaces as the "full and free" checks are gone through and call out the positions of the surfaces as he sees them eg "rudder left central right"?etc. (These are RAF terms I've used).
In an even older example, on the tail dragger Shackleton the brakes were air powered and on April1 on the 50th anniversary of the RAF, a young lad was doing his squadron conversion in a nasty crosswind. Long story short it left the paved surface at the runway intersection and into the Irish bog and tipped onto its nose. The very experienced QFI (and the lad) were pilloried straight off until,during the formal inquiry a while later, it was found that the brakes lines were cross connected. While trying to keep his hours up the lad went with other crews until one of them flew into the Mull of Kintyre. A sad tale.

Re: How many 'G' can an aeroplane stand?

Posted: Tue Dec 14, 2021 1:00 pm
by Boac
does the "crew chief" watch
Sadly no. No person to 'watch' the start or anything else, normally just pushback and chocking crew. The days of a dedicated engineer are gone.

However, if one is conducting a first flight after maintenance involving the control system, a crew should make sure the surfaces move correctly. Obviously that crew did not and suffered accordingly.