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Search: Posts Made By: DaveReidUK
Showing results 1 to 35 of 39
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Forum: Rumours & News
28th Apr 2018, 11:12
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

COL-16-37-GIA...

COL-16-37-GIA...
Forum: Rumours & News
29th Dec 2016, 12:08
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

Well that's one explanation, I suppose. The...

Well that's one explanation, I suppose.

The CVR stopped recording roughly 1 hour 45 minutes before the end of the flight. In the final 30 minutes of recording there was discussion on whether or...
Forum: Rumours & News
27th Dec 2016, 22:07
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

True, but that's a clearance issue, nothing to do...

True, but that's a clearance issue, nothing to do with aircraft certification.

According to the TC, the aircraft would have been certificated for a maximum altitude of between 31,000 and 35,000...
Forum: Rumours & News
27th Dec 2016, 21:47
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

What's the source for that assertion? The...

What's the source for that assertion?

The Type Certificate makes no mention of a 29,000 ft limitation.
Forum: Rumours & News
27th Dec 2016, 21:10
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

Correct. FL300 was the actual cruising level for...

Correct. FL300 was the actual cruising level for at least part of the flight, whereas the flightplan showed FL280.
Forum: Rumours & News
26th Dec 2016, 17:51
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

The report confirms that the aircraft departed...

The report confirms that the aircraft departed 500 kg overweight.

That is not considered a primary factor ("fator prioritário") affecting the outcome, though the previously posted RJ85...
Forum: Rumours & News
18th Dec 2016, 21:27
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

Some RJs do, for example the Brussels and Swiss...

Some RJs do, for example the Brussels and Swiss RJ100s, but CityJet's don't, so it's very unlikely that the LAMIA did.
Forum: Rumours & News
18th Dec 2016, 16:41
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

Out of interest, can you think of any accident...

Out of interest, can you think of any accident investigation where ADS-B has provided more of a clue to probable cause than the evidence provided by the FDR and CVR?
Forum: Rumours & News
13th Dec 2016, 06:35
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

Are you sure about that ? That's about 6:1. ...

Are you sure about that ?

That's about 6:1. The conventional wisdom is that a typical two-engined narrow-body (A320, say) can achieve about 17:1 clean.

Clearly a short, stubby, high-winged,...
Forum: Rumours & News
12th Dec 2016, 14:40
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

The statement is a tad confusing, and not...

The statement

is a tad confusing, and not strictly correct.

Mode S Enhanced Surveillance (EHS) and ADS-B aren't mutually exclusive - most aircraft nowadays have both - and the LAMIA RJ85 was no...
Forum: Rumours & News
10th Dec 2016, 13:24
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

There is a couple of hours of cruise flight...

There is a couple of hours of cruise flight missing from the ADS-B trace (because of lack of receiver coverage).

Immediately before that segment, the aircraft was climbing through FL300.
Forum: Rumours & News
10th Dec 2016, 06:31
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

http://www.avgen.com/RJ85%20payload-range.jpg ...

http://www.avgen.com/RJ85%20payload-range.jpg
Source: BAE SYSTEMS 2004

The solid line applies as the LAMIA aircraft didn't have pannier tanks, so range for a positioning flight with zero payload...
Forum: Rumours & News
9th Dec 2016, 23:04
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

You (and the "experts") might want to spend a...

You (and the "experts") might want to spend a little time studying the tradeoff of payload vs range for the RJ85 (or indeed for any aircraft):

The 28 October flight, for example (2800km/1510nm),...
Forum: Rumours & News
9th Dec 2016, 21:16
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

I don't see why that should come as a surprise -...

I don't see why that should come as a surprise - see my previous post on the protocol of accident investigation.

The Colombians have sent the FDR and CVR to the UK AAIB at Farnborough for analysis...
Forum: Rumours & News
9th Dec 2016, 07:05
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

The fact that the ADS-B data being sent was...

The fact that the ADS-B data being sent was subject to inertial drift doesn't necessarily imply that the crew didn't know exactly where they were. I haven't seen any suggestion that while they were...
Forum: Rumours & News
8th Dec 2016, 16:46
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

Murky stuff indeed. One thing I don't...

Murky stuff indeed.

One thing I don't understand is the reference - in this and other articles - to Quiroga not having had any managerial responsibility at Lamia, when his LinkedIn profile (still...
Forum: Rumours & News
8th Dec 2016, 12:20
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

Given that the FDR and CVR are being analysed by...

Given that the FDR and CVR are being analysed by the UK AAIB, I would be astounded if the contents of either were leaked prior to publication of the investigation report by the Colombians.
Forum: Rumours & News
7th Dec 2016, 12:38
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

Battery capacity and longevity are greatly...

Battery capacity and longevity are greatly affected by how much TLC or abuse they receive in service.

Given what we now know about the operational practices of the airline in question ...
Forum: Rumours & News
7th Dec 2016, 10:13
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

I very much doubt that any AIB would conclude...

I very much doubt that any AIB would conclude that.
Forum: Rumours & News
7th Dec 2016, 08:02
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

Hence my use of "not often", though I can't think...

Hence my use of "not often", though I can't think of many European cities that are more than a 4 hour direct flight from the UK.

And a 4-hour flight equates to 2-3 days on the road, so the OP's...
Forum: Rumours & News
7th Dec 2016, 07:06
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

Though UK Premier League clubs don't often play...

Though UK Premier League clubs don't often play opponents who are a 4+ hour flight away.
Forum: Rumours & News
4th Dec 2016, 16:10
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

They were due to be sent to the UK AAIB at...

They were due to be sent to the UK AAIB at Farnborough for analysis.

But protocol dictates that any announcement re the findings should come from the Colombian Grupo Investigación de Accidentes.
Forum: Rumours & News
3rd Dec 2016, 17:27
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

The FlightAware plot stops about 2 minutes...

The FlightAware plot stops about 2 minutes earlier, so it doesn't add much to what we already knew from the FR24 data, except that it does usefully include groundspeed.

Looking at the GS...
Forum: Rumours & News
3rd Dec 2016, 06:50
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

The error looks like much less than a mile to me....

The error looks like much less than a mile to me. At any rate, the holding pattern does not seem to be plotted at the VOR but several miles south. But it appears to be very close to the extended...
Forum: Rumours & News
2nd Dec 2016, 22:11
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

The remaining RJ85s that CityJet didn't sell to...

The remaining RJ85s that CityJet didn't sell to LAMIA regularly fly around the UK sending an ADS-B NUCp of 0.

Does that mean that over here we have departed from the planet without anyone...
Forum: Rumours & News
2nd Dec 2016, 21:56
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

So you're saying that the ill-fated flight was a...

So you're saying that the ill-fated flight was a figment of our collective imagination ... :ugh:
Forum: Rumours & News
2nd Dec 2016, 21:21
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

Don't confuse ADS-B with specific implementations...

Don't confuse ADS-B with specific implementations of it (e.g. NextGen, Hudson Bay, etc).

ADS-B doesn't have specific limits - the spec accommodates a wide range of accuracy and integrity levels,...
Forum: Rumours & News
2nd Dec 2016, 20:32
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

Yes. Most aircraft are, some aren't. The...

Yes.

Most aircraft are, some aren't. The latter include some older Boeings and Airbuses, too.
Forum: Rumours & News
2nd Dec 2016, 19:08
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

The aircraft didn't have GPS when it flew for...

The aircraft didn't have GPS when it flew for CityJet, and I'd be surprised if it had been retrofitted, so the ADS-B position reports will be from an inertial source.

That's supported by the fact...
Forum: Rumours & News
2nd Dec 2016, 12:55
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

He flew for TAM (Transporte Aéreo Militar), the...

He flew for TAM (Transporte Aéreo Militar), the transport wing of the Fuerza Aérea Boliviana.
Forum: Rumours & News
2nd Dec 2016, 09:10
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

The confusion isn't helped by soundbites like...

The confusion isn't helped by soundbites like this from their CEO:

"Fuel emergencies, declared when pilots come close to having 30 minutes of fuel left on landing, 'while rare, are not unusual' in...
Forum: Rumours & News
1st Dec 2016, 22:17
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

Though a bit of digging around suggests that when...

Though a bit of digging around suggests that when the aircraft in question was flying for CityJet it was certificated at 42,184 kg (93,000 lb).

So unless it had the higher-weight (97,000 lb) mods...
Forum: Rumours & News
1st Dec 2016, 18:26
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

The RJ85's certificated MTOW is (depending on mod...

The RJ85's certificated MTOW is (depending on mod state) 3,500-4,000 lb higher than the 146-200.
Forum: Rumours & News
1st Dec 2016, 16:20
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

Flightpath based on FlightRadar24 data

Usual FR24 caveats apply - in particular there are a whole bunch of missing data points at the entry to the hold, which I haven't attempted to interpolate.

http://www.avgen.com/LMI2933.jpg

RNG...
Forum: Rumours & News
30th Nov 2016, 20:55
Replies: 1,096
Views: 1,236,149
Posted By DaveReidUK

If we're going to be picky, the downed aircraft...

If we're going to be picky, the downed aircraft is certificated as a British Aerospace-built Avro 146 Series RJ85.

So referring to it as a BAe 146 is not unreasonable.
Showing results 1 to 35 of 39
 
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