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Search: Posts Made By: tdracer
Showing results 1 to 35 of 36
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Forum: Rumours & News
9th Dec 2019, 03:40
Replies: 4,656
Views: 4,791,169
Posted By tdracer

Mistakes were obviously made during the MAX cert....

Mistakes were obviously made during the MAX cert. Perhaps mistakes where made during the NG cert (although apparently not very serious mistakes, since the NG is statistically slightly safer than the...
Forum: Rumours & News
9th Dec 2019, 01:54
Replies: 4,656
Views: 4,791,169
Posted By tdracer

Nice post, too bad it's almost entirely wrong. ...

Nice post, too bad it's almost entirely wrong.
There is something called the "Changed Product Rule" or CPR (and before you get on about the FAA, CPR has been completely harmonized with EASA).
CPR...
Forum: Rumours & News
6th Dec 2019, 02:06
Replies: 4,656
Views: 4,791,169
Posted By tdracer

I would put the chance of a "MAX+" at sub-zero. ...

I would put the chance of a "MAX+" at sub-zero. If anything, the MAX fiasco has made the need for a new NMA more urgent. While Boeing has committed to the MAX 737-10, there is no way they can get...
Forum: Rumours & News
5th Dec 2019, 22:25
Replies: 4,656
Views: 4,791,169
Posted By tdracer

Strange comment, given the target market for the...

Strange comment, given the target market for the NMA is basically the same as the A321LR NEO that United ordered.
Forum: Rumours & News
4th Dec 2019, 23:41
Replies: 4,656
Views: 4,791,169
Posted By tdracer

Boeing is on record as providing legal defense...

Boeing is on record as providing legal defense and financial protections to their "Authorized Representatives" (ARs) if they are sued for their actions as an AR (provided they acted in good faith)....
Forum: Rumours & News
2nd Dec 2019, 03:26
Replies: 4,656
Views: 4,791,169
Posted By tdracer

Dave, we're probably debating minutia here,...

Dave, we're probably debating minutia here, although I agree Fly is confusing type cert with the aircraft specific airworthiness certificate - what we always referred to as being 'ticketed'. An...
Forum: Rumours & News
2nd Dec 2019, 01:48
Replies: 4,656
Views: 4,791,169
Posted By tdracer

In short, you're wrong. Every new aircraft gets...

In short, you're wrong. Every new aircraft gets approved - "ticketed" - by the FAA before it can be delivered - and it's done on an aircraft by aircraft basis. An aircraft can't be ticketed if there...
Forum: Rumours & News
21st Aug 2019, 00:19
Replies: 4,656
Views: 4,791,169
Posted By tdracer

There are hundreds of undelivered MAX aircraft...

There are hundreds of undelivered MAX aircraft sitting at airports all around the Puget Sound, as well as Moses Lake and a few other places.
By regulation, those aircraft have to be in the...
Forum: Rumours & News
20th Aug 2019, 00:10
Replies: 4,656
Views: 4,791,169
Posted By tdracer

Smythe, that's all beside the point. Of course...

Smythe, that's all beside the point. Of course Boeing can fix the MAX and undoubtedly will - the NG is statistically one of the safest aircraft ever built (marginally better than the A320 series)...
Forum: Rumours & News
19th Aug 2019, 21:57
Replies: 4,656
Views: 4,791,169
Posted By tdracer

But the car companies that came out of that...

But the car companies that came out of that didn't look much like they did pre-bankruptcy, and the car companies outstanding liabilities were way less than $100 billion.
The resultant Boeing...
Forum: Rumours & News
19th Aug 2019, 21:17
Replies: 4,656
Views: 4,791,169
Posted By tdracer

If you're correct, you can say goodbye to Boeing...

If you're correct, you can say goodbye to Boeing - at least as it's existed for the last 100 years. A permanent grounding would cost Boeing north of $100 Billion - not even Boeing could survive...
Forum: Rumours & News
1st Aug 2019, 21:10
Replies: 4,656
Views: 4,791,169
Posted By tdracer

This is known as "Single Event Upset" or SEI....

This is known as "Single Event Upset" or SEI. Although rare, as processors and memory get smaller and more dense, the probability of SEI goes up. In early FADECs, SEI was pretty much unheard of,...
Forum: Rumours & News
1st Aug 2019, 08:16
Replies: 4,656
Views: 4,791,169
Posted By tdracer

Lets put it this way. You go to an organization...

Lets put it this way. You go to an organization with 100 people. 95 of the people are happy, 5 are not. You interview all 100 people, but you write your article based entirely on what the 5 unhappy...
Forum: Rumours & News
31st Jul 2019, 21:29
Replies: 4,656
Views: 4,791,169
Posted By tdracer

Agreed - there was a time when most reporters...

Agreed - there was a time when most reporters strived to give accurate, unbiased information - they were not always successful since it's impossible to filter out all bias - but they tried.
Those...
Forum: Rumours & News
31st Jul 2019, 00:06
Replies: 4,656
Views: 4,791,169
Posted By tdracer

I'm saying that it's not black and white - the...

I'm saying that it's not black and white - the rotor burst requirements have 'judgement' involved. The one-in-twenty is not a requirement, it's one method of showing compliance, but it's not the only...
Forum: Rumours & News
30th Jul 2019, 21:46
Replies: 4,656
Views: 4,791,169
Posted By tdracer

Failure to meet the one-in-twenty requirement...

Failure to meet the one-in-twenty requirement contained in the rotor burst Advisory Circular doesn't mean it's not compliant. An AC outlines an acceptable method of compliance, but not the only...
Forum: Rumours & News
30th Jul 2019, 01:35
Replies: 4,656
Views: 4,791,169
Posted By tdracer

No, the rotor burst risk did not change due to...

No, the rotor burst risk did not change due to moving the engine forward - the rotor burst risk changed because the potential rotor burst debris got larger due to a larger diameter engine.

Big...
Forum: Rumours & News
29th Jul 2019, 18:23
Replies: 4,656
Views: 4,791,169
Posted By tdracer

Thank you infrequent - that's exactly what I...

Thank you infrequent - that's exactly what I meant. If debris from one engine had enough energy to penetrate through the opposite engine to take out the FADEC or other engine critical system, it...
Forum: Rumours & News
29th Jul 2019, 01:37
Replies: 4,656
Views: 4,791,169
Posted By tdracer

While I didn't work the MAX, I have worked...

While I didn't work the MAX, I have worked uncontained rotor burst analysis.
The position of the engine is largely immaterial to the risk to the flight control cables - first, if the uncontained...
Forum: Rumours & News
22nd Jul 2019, 23:09
Replies: 4,656
Views: 4,791,169
Posted By tdracer

This is more common than you may think - there...

This is more common than you may think - there are a lot of aircraft out there that were certified in the 1980s and early 1990s - some still in production - e.g. the 767 and 777 - and they need...
Forum: Rumours & News
15th Jul 2019, 06:56
Replies: 4,656
Views: 4,791,169
Posted By tdracer

One of the linked Seattle Times articles stated...

One of the linked Seattle Times articles stated that they initially tried to solve the force problem with aerodynamic tricks - vortex generators, etc. Nothing did much good. Then someone came up...
Forum: Rumours & News
14th Jul 2019, 04:12
Replies: 4,656
Views: 4,791,169
Posted By tdracer

At the risk of further thread drift - yes Boeing...

At the risk of further thread drift - yes Boeing embraced going to a delegated authority in the aftermath of the strike, but it wasn't their idea - it came from DC. After watching in horror as the...
Forum: Rumours & News
14th Jul 2019, 02:04
Replies: 4,656
Views: 4,791,169
Posted By tdracer

I read Stan Sorscher's opinion piece as well -...

I read Stan Sorscher's opinion piece as well - and think it was spot on (by the way, if you know him, I suspect he'd appreciate spelling his name correctly). But that change to a profit driven...
Forum: Rumours & News
13th Jul 2019, 23:13
Replies: 4,656
Views: 4,791,169
Posted By tdracer

I know a few of the senior people on the MAX...

I know a few of the senior people on the MAX program. I can pretty categorically state that is NOT the case.
Forum: Rumours & News
13th Jul 2019, 21:09
Replies: 4,656
Views: 4,791,169
Posted By tdracer

Perhaps, but I know for a fact that at least one...

Perhaps, but I know for a fact that at least one has attempted suicide in the aftermath, and others are receiving psychiatric care.
It might surprise you, but the people involved were not unfeeling...
Forum: Rumours & News
28th Jun 2019, 18:44
Replies: 4,656
Views: 4,791,169
Posted By tdracer

In short, it depends. Both EASA and the FAA had...

In short, it depends. Both EASA and the FAA had their strengths and weaknesses. In both cases, there was a tendency to 'miss the forest for the trees' - that is to become obsessed with one small...
Forum: Rumours & News
27th Jun 2019, 18:38
Replies: 4,656
Views: 4,791,169
Posted By tdracer

[/left] Agreed - this was SOP when doing FADEC...

[/left]
Agreed - this was SOP when doing FADEC software changes to the 1980's era engine controls where memory and throughput were at a premium, and making hardware changes to thousands of...
Forum: Rumours & News
19th Jun 2019, 21:08
Replies: 4,656
Views: 4,791,169
Posted By tdracer

You'll have to wait for the Indonesians to say...

You'll have to wait for the Indonesians to say what was found - by procedure no one else is permitted to talk publicly about it.
I read somewhere that the Ethiopian AOA was damaged by a bird strike,...
Forum: Rumours & News
15th Jun 2019, 02:18
Replies: 4,656
Views: 4,791,169
Posted By tdracer

Hull loss rates have been an industry safety...

Hull loss rates have been an industry safety benchmark for at least 50 years, and are used, tracked, and published by several aviation safety organizations as well as every major aircraft...
Forum: Rumours & News
13th Jun 2019, 03:35
Replies: 4,656
Views: 4,791,169
Posted By tdracer

Would you be willing to bet your job and...

Would you be willing to bet your job and livelihood on that, just to make a social media post? Even if you don't get fired, it's the very definition of career limiting - and if you do get fired for...
Forum: Rumours & News
12th Jun 2019, 18:18
Replies: 4,656
Views: 4,791,169
Posted By tdracer

Bill fly and infrequentflyer, it probably goes at...

Bill fly and infrequentflyer, it probably goes at bit further than that. During an active investigation, the participants are under what's basically a gag order - all public information releases...
Forum: Rumours & News
11th Jun 2019, 20:44
Replies: 4,656
Views: 4,791,169
Posted By tdracer

No, "must add" doesn't mean it wasn't there, it...

No, "must add" doesn't mean it wasn't there, it means that the FAA and Boeing didn't agree on the level of redundancy. Boeing is putting all the indications in EICAS, the FAA wants more. This is...
Forum: Rumours & News
10th Jun 2019, 03:35
Replies: 4,656
Views: 4,791,169
Posted By tdracer

Smythe, you might want to check the list of EICAS...

Smythe, you might want to check the list of EICAS messages and indications before you spout such nonsense...
Forum: Rumours & News
7th Jun 2019, 05:09
Replies: 4,656
Views: 4,791,169
Posted By tdracer

The -10 will be longer - which gives a better...

The -10 will be longer - which gives a better moment arm for the tail. So the -10 can have more thrust than a -9, which can have more thrust than a -8 (for the same reason).

Smythe, high/hot is a...
Forum: Rumours & News
6th Jun 2019, 04:56
Replies: 4,656
Views: 4,791,169
Posted By tdracer

The maximum thrust of the engine is limited on...

The maximum thrust of the engine is limited on the 737 by the ability to counteract the thrust induced pitch-up moment - hence the max thrust on the 737-8 is not a whole lot different than the max...
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