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Search: Posts Made By: DaveReidUK
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Forum: Rumours & News
1st Apr 2017, 17:27
Replies: 326
Views: 237,340
Posted By DaveReidUK

You might want to have a read of ICAO Annex 13,...

You might want to have a read of ICAO Annex 13, in particular the definition of "serious incident" and the examples given of events that fall into that category.
Forum: Rumours & News
30th Mar 2017, 13:48
Replies: 326
Views: 237,340
Posted By DaveReidUK

ADS-B almost always sends baro altitude not GPS...

ADS-B almost always sends baro altitude not GPS height, so none of the above is relevant. Once you're above the transition altitude, what it sends will be the same, give or take the 25 feet, as you...
Forum: Rumours & News
30th Mar 2017, 06:39
Replies: 326
Views: 237,340
Posted By DaveReidUK

No, FR24 showed zero, which isn't quite the same...

No, FR24 showed zero, which isn't quite the same thing. :*

I suspect that where a non-corrected ADS-B altitude becomes negative (i.e. in this case at the points where the actual height was less...
Forum: Rumours & News
28th Mar 2017, 17:19
Replies: 326
Views: 237,340
Posted By DaveReidUK

Are you saying that TSB Safety Recommendations...

Are you saying that TSB Safety Recommendations directed at Transport Canada are routinely ignored ?
Forum: Rumours & News
28th Mar 2017, 16:06
Replies: 326
Views: 237,340
Posted By DaveReidUK

Worth noting that the "Further Action Required:...

Worth noting that the "Further Action Required: No" is Transport Canada's categorisation of the event.

The Canadian TSB, on the other hand, opened an investigation on 17th March, categorising the...
Forum: Rumours & News
27th Mar 2017, 06:27
Replies: 326
Views: 237,340
Posted By DaveReidUK

I suspect that may not read the way you intended...

I suspect that may not read the way you intended it to.
Forum: Rumours & News
16th Mar 2017, 07:49
Replies: 326
Views: 237,340
Posted By DaveReidUK

The ADS-B does show the deviation, as it is...

The ADS-B does show the deviation, as it is designed to do..

No matter what QNH you set the altimeter to, it has no effect on what's sent by the transponder.
Forum: Rumours & News
15th Mar 2017, 19:41
Replies: 326
Views: 237,340
Posted By DaveReidUK

Are you seriously suggesting that the difference...

Are you seriously suggesting that the difference between standard 1013.2 mb and on the day QNH 1019 mb (about 150') isn't significant on approach ?

misset: to set, adjust or calibrate something...
Forum: Rumours & News
15th Mar 2017, 18:18
Replies: 326
Views: 237,340
Posted By DaveReidUK

You may be right. It's probably worth...

You may be right.

It's probably worth clarifying what we can deduce (based on the transponder data) to have been the minimum height to which the aircraft descended on its first approach (at...
Forum: Rumours & News
15th Mar 2017, 16:46
Replies: 326
Views: 237,340
Posted By DaveReidUK

The "baro altitude" that the OP is referring to...

The "baro altitude" that the OP is referring to is the data sent by the transponder (which is the only information we have access to at this time).

That data isn't affected by whether or not the...
Forum: Rumours & News
14th Mar 2017, 23:42
Replies: 326
Views: 237,340
Posted By DaveReidUK

Correct. In this case, add approximately...

Correct.

In this case, add approximately 150' to the Mode S/ADS-B altitudes to get true AMSL values.
Forum: Rumours & News
11th Mar 2017, 11:54
Replies: 326
Views: 237,340
Posted By DaveReidUK

That YouTube video helpfully includes the TCNM...

That YouTube video helpfully includes the TCNM METAR at the end.

A QNH of 1019 would indicate that actual heights AMSL will have been approximately 150' greater than the Mode C values.
Forum: Rumours & News
11th Mar 2017, 09:57
Replies: 326
Views: 237,340
Posted By DaveReidUK

Yes, the words "too low" spring to mind. What's...

Yes, the words "too low" spring to mind. What's your point ?
Forum: Rumours & News
11th Mar 2017, 09:51
Replies: 326
Views: 237,340
Posted By DaveReidUK

Here, for the geometrically-challenged, is the...

Here, for the geometrically-challenged, is the FR24 data plotted relative to a nominal 3.15° approach.

http://www.avgen.com/WS2652(2).jpg

The blue diamonds represent the first approach and the...
Forum: Rumours & News
11th Mar 2017, 06:43
Replies: 326
Views: 237,340
Posted By DaveReidUK

No, it doesn't (apologies, mods, for the...

No, it doesn't

(apologies, mods, for the size of the image, which shows each of the two approaches, from roughly 2500' Mode C at the extreme left)

http://www.avgen.com/WS2652.jpg

If there's...
Forum: Rumours & News
10th Mar 2017, 19:32
Replies: 326
Views: 237,340
Posted By DaveReidUK

Really? The final 3000' of descent was made...

Really?

The final 3000' of descent was made at an angle of 3.15°.
Forum: Rumours & News
10th Mar 2017, 19:14
Replies: 326
Views: 237,340
Posted By DaveReidUK

The FR24 data shows no discernable difference...

The FR24 data shows no discernable difference between the profiles for the first and second approach.
Showing results 1 to 17 of 17


 
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