Search found 16 matches

by tupperjets
Sun Mar 10, 2019 6:22 pm
Forum: Site Related
Topic: New factual information flag
Replies: 10
Views: 3422

Re: New factual information flag

On a personal level, I don't see the point in those long-running accident threads anyway. The discussion is largely dominated by speculation, rumors which usually prove false, and people frankly who don't have much of a clue what they're talking about. ... I never participate; I think that's the ca...

Jump to post
by tupperjets
Sun Nov 19, 2017 4:48 pm
Forum: Technical/Operations
Topic: Why do the OEMs Outsource?
Replies: 17
Views: 1858

Re: Why do the OEMs Outsource?

Wiederling: If you don't mind, please expand on your post.

Which aspects of Boeing's culture do you think lead to difficulties?

Which suppliers do you think have had issues with Boeing, but not other integrators?

Jump to post
by tupperjets
Wed Oct 25, 2017 11:13 pm
Forum: Technical/Operations
Topic: Technical questions regarding (uncontained) engine failures
Replies: 18
Views: 4625

Re: Technical questions regarding (uncontained) engine failures

AC 20-128A establishes 1 in 20 as the threshold for acceptable risk of a catastrophic outcome for safety analysis of 1/3 disk uncontainment.

Not exactly what was said, but probably the source for the statement.

Jump to post
by tupperjets
Mon May 29, 2017 11:09 pm
Forum: Technical/Operations
Topic: Advice for an aerospace engineering student
Replies: 8
Views: 1573

Re: Advice for an aerospace engineering student

I won't bother rehashing gtae70's post, which I agree with wholeheartedly. I'm just over 6 years into a career in aerospace engineering (production support) on the merit of a 4-year degree in mechanical engineering. My day-to-day statement of work depends on all of the things I have learned since le...

Jump to post
by tupperjets
Fri Apr 21, 2017 10:47 pm
Forum: Technical/Operations
Topic: Airframe hours/cycles
Replies: 4
Views: 852

Re: Airframe hours/cycles

Ascend might work.

I haven't used it much; I'll see if it's got hours and cycles and post results next week.

Jump to post
by tupperjets
Tue Apr 11, 2017 8:26 am
Forum: Technical/Operations
Topic: A380 Fuel Tanks Usage Order
Replies: 6
Views: 4502

Re: A380 Fuel Tanks Usage Order

Center tank first for wing bending relief would be the only sane choice...

Jump to post
by tupperjets
Tue Apr 11, 2017 6:57 am
Forum: Technical/Operations
Topic: Air-to-air refuelling; what about wake turbulence?
Replies: 20
Views: 4183

Re: Air-to-air refuelling; what about wake turbulence?

I found this article interesting. The first thing in our "Dash 1" technical orders states: "Because of the magnitude of interrelated aerodynamic effects flying two aircraft at close vertical proximity is unsafe." So basically the USAF tells us that our job is not safe right off t...

Jump to post
by tupperjets
Tue Mar 28, 2017 12:29 am
Forum: Civil Aviation
Topic: 40 years since Tenerife
Replies: 49
Views: 17151

Re: 40 years since Tenerife

DTWSAN wrote:
is there a way to translate it to English?

Yes, yes there is.

Jump to post
by tupperjets
Sun Mar 26, 2017 5:52 pm
Forum: Technical/Operations
Topic: Movie Theater Seats on Airliners?
Replies: 8
Views: 1744

Re: Movie Theater Seats on Airliners?

Might be difficult to get something like that certified for crashworthiness. Seats are required to withstand a 16G force without failing In case anyone is interested: 14 CFR 25.561 has static load cases (9 g forward, for example). The 16 g comes into play from 14 CFR 25.562 , which added dynamic lo...

Jump to post
by tupperjets
Sat Mar 25, 2017 4:26 pm
Forum: Technical/Operations
Topic: Ideas on Wheel Shop "audit"
Replies: 5
Views: 1004

Re: Ideas on Wheel Shop "audit"

How is nonconforming product handled? Is it segregated from production? Do they have written processes for rework/repair?

Jump to post
by tupperjets
Wed Mar 01, 2017 2:09 pm
Forum: Technical/Operations
Topic: Ullage inerting on airbus planes?
Replies: 10
Views: 1731

Ullage inerting on airbus planes?

TWA 800 came up in another thread a while ago. The question asked "was the flammability of TWA 800's fuel tank unusual?" Did some googling, looks like the (heated) center wing tank of new production Boeing planes use NGSs made by Honeywell. I'm curious if airbus has any kind of inerting s...

Jump to post
by tupperjets
Sat Jan 21, 2017 6:44 pm
Forum: Civil Aviation
Topic: LATAM B763 at Sao Paulo on Jan 15th 2017, aircraft being shot at
Replies: 18
Views: 5175

Re: LATAM B763 at Sao Paulo on Jan 15th 2017, aircraft being shot at

You seem to think I'm arguing with you rather than providing context.

I am saying the flammability of TWA's tank on climb-out was exceptional. FAR 25.981 requires a fleet average flammability exposure of 2% or less.

None of this makes blowing up an aircraft impossible.

Jump to post
by tupperjets
Sat Jan 21, 2017 6:33 pm
Forum: Civil Aviation
Topic: LATAM B763 at Sao Paulo on Jan 15th 2017, aircraft being shot at
Replies: 18
Views: 5175

Re: LATAM B763 at Sao Paulo on Jan 15th 2017, aircraft being shot at

TWA 800's center wing tank was (supposedly) set off by a small electrical spark. Now imagine what a hot glowing tracer round might do to a similarly warm tank. TWA 800 was sitting on hot tarmac running the air conditioning (further heating the center wing tank) for a few hours prior to take-off. TW...

Jump to post
by tupperjets
Tue Dec 27, 2016 12:35 am
Forum: Civil Aviation
Topic: Russia Grounds Sukhoi Superjet Over Safety Concerns
Replies: 43
Views: 19909

Re: Russia Grounds Sukhoi Superjet Over Safety Concerns

Think the AA A300 with overtorqued bolts that resulted in a horizontal stabilizer failure. If it was found that an assembly or maintenance torque was wrong, that could explain this issue. It could be, and this is a risk of tail mounted engines, that high cycle fatigue is an issue. Perhaps engine vi...

Jump to post
by tupperjets
Sun Dec 25, 2016 8:18 pm
Forum: Site Related
Topic: Time for Sub Forums
Replies: 4
Views: 1523

Re: Time for Sub Forums

Resurrecting this thread in lieu of creating a new one. I think sub-forums are needed, but organized by topic instead of region. I, for one, would love to be able to just click on "aviation safety" as a sub-forum of "civil aviation" and not have to wade through tons of operations...

Jump to post
by tupperjets
Sun Dec 25, 2016 8:09 pm
Forum: Civil Aviation
Topic: Russia Grounds Sukhoi Superjet Over Safety Concerns
Replies: 43
Views: 19909

Re: Russia Grounds Sukhoi Superjet Over Safety Concerns

Metal fatigue is a very serious issue. It caused a lot of crashes in the past, think e.g. about the Comet. Metal fatigue is a known phenomenon (a major design driver) and the presence of active crack tips is expected at a certain (late) phase of a modern damage-tolerant transport airplane's life. I...

Jump to post