LATAM 1325!!!
Whatever the reason for the severe weather entry, the drivers need to be given thanks for parking the plane on a piece of concrete. A bad encounter can occur to prepared crews, and Wx avoidance is an art, not a science, irrespective of the CAL position, or in spite of it. Gonna be a good read of the report if it is ever released to the great unwashed.
That was one sick puppy post strikes...
As far as the B737MAX alerting system goes vs the advanced systems, that cockpit would have been one busy sweatshop for a few minutes, it would have been like Shreck and Donkey, the trick is not that it talks, it is getting it to shut up. The ECAM will scroll a lot in that case, and every new message is an irritant, the guys probably knew that they had a problem, don't need betty bleating and whining in their ears.
Nope, it doesn’t say it detects hail, the RDR4000 is able to predict likely locations for hail by analysing the reflective returns structure which is rain, ie water. Virtually no aircraft are even fitted with this option yet, even of the ones with an RDR4000.
As with all weather radar wet hail has a weak, ie green return. Dry hail (all ice) has virtually no return.
Know the limitations of your kit.
As with all weather radar wet hail has a weak, ie green return. Dry hail (all ice) has virtually no return.
Know the limitations of your kit.
Last edited by Locked door; 28th Oct 2022 at 17:44.
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Weather Radar
Sorry but weather radar can clearly depict thunderstorms and especially in colour. It would have clearly shown areas of high intensity, particularly the red and orange areas. This would have clearly indicated areas of high precipitation and turbulence. I wonder if ATC advised crew of sigmets or reports from other pilots in the vicinity? So were they aware of what they might expect on their route prior to takeoff? Enroute weather charts clearly interpretated? Might have they missed something? Severe turbulence as a result of thunderstorm penetration together with substantial hail caused extensive damage, and possible engine flame out (to be confirmed) and RAT deployment. Could have this been avoided? Time will tell. The report will make an interesting read!
Nope, it doesn’t say it detects hail, the RDR4000 is able to predict likely locations for hail by analysing the reflective returns structure which is rain, ie water. Virtually no aircraft are even fitted with this option yet, even of the ones with an RDR4000.
As with all weather radar wet hail has a weak, ie green return. Dry hail (all ice) has virtually no return.
Know the limitations of your kit.
As with all weather radar wet hail has a weak, ie green return. Dry hail (all ice) has virtually no return.
Know the limitations of your kit.
As operators, we have a positive bias towards minimising the avoidance distances to severe weather. Most often, the planes don't get whacked. Weather doesn't always give convenient solutions for avoidance; hard to avoid by "20nm" when cells are closely spaced... CAL is adequate for 99.9% of all ops... which means occasionally we are caught flat footed if not maintaining the art of doing radar. Airline managers give the weather avoidance info as top cover, then Wx advisories are based on distances that are a fraction of that guidance from the Wx services. Same system and pax get upset when drivers park as there is a cloud near their departure or destination airport.
Airbus have written a briefing note about using weather radar-
https://safetyfirst.airbus.com/optim...weather-radar/
The word hail is mentioned in it twenty three times.
https://safetyfirst.airbus.com/optim...weather-radar/
The word hail is mentioned in it twenty three times.
Great article, thanks for the link. I’ve taken the liberty of copy and pasting one paragraph from it below. Can I suggest that everyone who reads this thread reads the whole article. Skipperharris especially.
ATB
LD
One of the weather radar limitations is that it indicates only the presence of liquid water. The consequence is that a thunderstorm does not have the same reflectivity over its altitude range because the quantity of liquid water in the atmosphere decreases with the altitude (fig.4). Yet, the convective cloud and associated threats may extend significantly above the upper detection limit of the weather radar (called ‘radar top’). This means that reflectivity is not directly proportional to the level of risk that may be encountered: a convective cloud may be dangerous, even if the radar echo is weak.
ATB
LD
One of the weather radar limitations is that it indicates only the presence of liquid water. The consequence is that a thunderstorm does not have the same reflectivity over its altitude range because the quantity of liquid water in the atmosphere decreases with the altitude (fig.4). Yet, the convective cloud and associated threats may extend significantly above the upper detection limit of the weather radar (called ‘radar top’). This means that reflectivity is not directly proportional to the level of risk that may be encountered: a convective cloud may be dangerous, even if the radar echo is weak.
Last edited by Locked door; 29th Oct 2022 at 08:44.
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It's also worth noting that once you are in an area of heavy precipitation, your Wx avoidance capability is often reduced to zero, as the display is overwhelmed with solid red returns in all directions irrespective of the selected range.
YouTube video of passenger experience inside cabin in the storm (not a fan of the narration but the footage is good) https://m.youtube.com/watch?v=snsRk84SG7k
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Nope, it doesn’t say it detects hail, the RDR4000 is able to predict likely locations for hail by analysing the reflective returns structure which is rain, ie water. Virtually no aircraft are even fitted with this option yet, even of the ones with an RDR4000.
As with all weather radar wet hail has a weak, ie green return. Dry hail (all ice) has virtually no return.
Know the limitations of your kit.
As with all weather radar wet hail has a weak, ie green return. Dry hail (all ice) has virtually no return.
Know the limitations of your kit.
https://www.collinsaerospace.com/wha...-weather-radar
