Cathay Pacific flight aborts take-off in Hong Kong - 11 injured

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Unclear what actually happened but PAX evacuted on the slides - which seems to be the cause of injuries…! Hopefully not hit on the head by carry on bags sliding down….
 
Seems odd - presumably misreported somewhere in the chain. Or maybe smoke detected only then.

The injuries occurred during a precautionary evacuation back at the gate, when passengers exited the aircraft using five door escape slides.
 
I'm told at the gate the cabin service manager overheard the pilots talking about slides. She just went ahead and deployed them (I presume this means called for an evacuation?) which was unnecessary.

I'm more intrigued how they taxied to the gate with the tyres in that state? @jb747 any ideas?

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I'm told at the gate the cabin service manager overheard the pilots talking about slides. She just went ahead and deployed them (I presume this means called for an evacuation?) which was unnecessary.

I'm more intrigued how they taxied to the gate with the tyres in that state? @jb747 any ideas?

View attachment 334705
HKG - LAX = Heavy fuel load.
Aborted take-off can mean a lot of braking power required to stop safely.
That in turn means the tyres will heat up. One tyre shows damage, the others may have deflated without any visible damage.

What jumps into my mind as an explanation - and I’m likely wrong but we'll know the facts in due course - is that the aircraft returned to the gate to debark the pax and either the smell of burning rubber from the stressed tyres penetrated the cabin or an actual fire broke out and smoke was visible outside.

If the airbridge is not connected and there’s a possibility your plane full of fuel and people is on fire then evacuating via slides might be the prudent option. A few seconds can make a big difference in a fire emergency.

[ETA More details here]]
 
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tire shredding is the reason, and using these slides could cause scrapes easily
 
Would've been much safer just to continue on to LAX (as it turns out).
 
Would've been much safer just to continue on to LAX (as it turns out).
I think we might need to ask the pilot on this, but if the problem was serious enough that they rejected the takeoff it's likely something that would have caused problems in flight. I understand it was a sensor probe and something similar caused the loss of an Air France flight over the Atlantic some years back - coupled with some pilot misjudgement.
 
I think we might need to ask the pilot on this, but if the problem was serious enough that they rejected the takeoff it's likely something that would have caused problems in flight. I understand it was a sensor probe and something similar caused the loss of an Air France flight over the Atlantic some years back - coupled with some pilot misjudgement.
Yes indeed, it's all conjecture. I was just thinking that other actions could have resulted in fewer (or no) injuries.
 
Yes indeed, it's all conjecture. I was just thinking that other actions could have resulted in fewer (or no) injuries.
Yeah. I wasn't there, I haven't seen an official report, just a couple of media reports and some pictures. My best guess is that they ordered an evacuation - with the certainty of people being injured by incorrect procedure and flying bags - because there was a possibility that the plane might catch fire and make things a heap worse.

I look at the pictures in the safety videos and the cards and I'd be worried that I'd screw up and just tumble down the slide. God knows what happens with people who haven't been listening or studying the diagrams and grab their bags. There's also people who evacuate safely and then don't move away from the foot of the slide, getting skittled by the next guy down.

Frankly, evacuating a 777 with only a dozen injuries sounds pretty good to me. Even with cabin crew who supposedly know what they are doing they get broken bones and stuff, just in the familiarisation training.
 
Yeah. I wasn't there, I haven't seen an official report, just a couple of media reports and some pictures. My best guess is that they ordered an evacuation - with the certainty of people being injured by incorrect procedure and flying bags - because there was a possibility that the plane might catch fire and make things a heap worse.

I look at the pictures in the safety videos and the cards and I'd be worried that I'd screw up and just tumble down the slide. God knows what happens with people who haven't been listening or studying the diagrams and grab their bags. There's also people who evacuate safely and then don't move away from the foot of the slide, getting skittled by the next guy down.

Frankly, evacuating a 777 with only a dozen injuries sounds pretty good to me. Even with cabin crew who supposedly know what they are doing they get broken bones and stuff, just in the familiarisation training.

An evacuation wasn't ordered by the pilots. It was mistakenly ordered by the CSM according to my source.
 
An evacuation wasn't ordered by the pilots. It was mistakenly ordered by the CSM according to my source.
Yeah, I saw that. I don't know the facts, but if I was a CSM and I found the cabin filling up with smoke I wouldn't wait for the captain, because if the thing did go up in flames I'd have to be one of the last off and might not make it.

I've seen videos of people evacuating burning planes and read reports and it is just sickening. A few broken arms are nothing compared to aisles crammed with charred bodies.

Anyway, the crew was there on the spot, presumably weighing the risks and holding the responsibility. I'm just spouting off from a different continent from the cheap seats with the benefit of hindsight.
 
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I'm told at the gate the cabin service manager overheard the pilots talking about slides. She just went ahead and deployed them (I presume this means called for an evacuation?) which was unnecessary.

I'm more intrigued how they taxied to the gate with the tyres in that state?
I'd expect that they weren't in that state. After an abort, the tyre heats up over time, as the heat from the brakes slowly makes its way into the surrounding structure and tyre. Eventually the fusible plugs will melt, and deflate the tyre, but you could well be at the gate by then.
Aborted take-off can mean a lot of braking power required to stop safely.
It would mean all of it initially....but there is nothing to stop you kicking the autobrake out, to modulate the braking and so reduce the heating. As you can see if you look at FR24, they came off the runway quite quickly, but then had to taxing about 2km to the gate. Modulating the braking would have reduced the heating a lot. Basically, there was no reason to exit the runway so quickly after a stop from about 155 knots ground speed.
That in turn means the tyres will heat up. One tyre shows damage, the others may have deflated without any visible damage.
Fusible plugs. The aft tyres are the ones that are damaged, and I'd suspect that happened in the turns. If I recall correctly, you need to keep taxi speed down to about 3 knots with a deflated tyre. FR24 does not show them doing that, so either they just didn't or more likely the tyres were not deflated.
What jumps into my mind as an explanation - and I’m likely wrong but we'll know the facts in due course - is that the aircraft returned to the gate to debark the pax and either the smell of burning rubber from the stressed tyres penetrated the cabin or an actual fire broke out and smoke was visible outside.
You don't evacuate based on smell.
If the airbridge is not connected and there’s a possibility your plane full of fuel and people is on fire then evacuating via slides might be the prudent option. A few seconds can make a big difference in a fire emergency.
True, but was it actually an emergency? Doesn't seem so to me.
How can you land the plane then
Same as usual. You'll ensure there's a runway inspection after landing, and also have engineering look at you before you taxi too far.
With one blown tyre, not a major problem, and the plane is much lighter.
Exactly.
I think we might need to ask the pilot on this, but if the problem was serious enough that they rejected the takeoff it's likely something that would have caused problems in flight. I understand it was a sensor probe and something similar caused the loss of an Air France flight over the Atlantic some years back - coupled with some pilot misjudgement.
AF crashed because at least one of the pilots couldn't fly.

There is no information that I've seen on exactly what caused them to decide to abort. It was at quite high speed, actually quite a bit faster than I'd be using for an abort due to sensor/ADR/IRS.
An evacuation wasn't ordered by the pilots. It was mistakenly ordered by the CSM according to my source.
Oops.
Yeah, I saw that. I don't know the facts, but if I was a CSM and I found the cabin filling up with smoke I wouldn't wait for the captain, because if the thing did go up in flames I'd have to be one of the last off and might not make it.
Not their call at all. A wheel well/landing gear fire is likely to take quite some time before it causes issues. This is actually tested by the manufacturers, who do a max effort abort, and then sit for at least 5 minutes after ignition before the fire crews are allowed to approach.
 
Re CX880 evacuation: More details from the SCMP here. Suggestions that "loud bangs" were heard in the cabin, apparently the fusible plugs mentioned by @jb747. A promised report within a month. Confusion and miscommunication suggested as a cause for slide deployment with the flight crew not ordering the evacuation which turned out to be unnecessary, expensive, and a cause of injuries and delay.

 
Re CX880 evacuation: More details from the SCMP here. Suggestions that "loud bangs" were heard in the cabin, apparently the fusible plugs mentioned by @jb747. A promised report within a month. Confusion and miscommunication suggested as a cause for slide deployment with the flight crew not ordering the evacuation which turned out to be unnecessary, expensive, and a cause of injuries and delay.
There's not really any new detail in that, just a bit more conjecture. At least we have the obligatory bangs, though I couldn't find the plunge.

Actually there may be reason to use slides at the gate, but not in this case. Evacuations at the gate are problematic, and there are no set answers.

Part of my plan for a post abort PA would have been to mention the plugs, and also the fact that you might even feel a tyre deflating. Of course, whether I'd be calm enough to stick to the script is another thing entirely.

As an aside, normally when the autobrake is in play, pilots disconnect it by momentarily manually demanding a slightly higher manual (pedal) braking effort. There are a couple of other ways too, but that would be 9 times out of 10. But, once RTO takes effect, you cannot demand more braking, because the system is already demanding the max, so the easiest way to get rid of it will be to actually turn it off. But, by the time you realise, and then do this, you'll already be more or less stopped...so I suspect that is why they came off the runway so early.

Back to the newspaper article...the temperatures are brake, not tyre, temps. And they'll be headed for 1,000º, not 100º.
 
Part of my plan for a post abort PA would have been to mention the plugs, and also the fact that you might even feel a tyre deflating. Of course, whether I'd be calm enough to stick to the script is another thing entirely.
Thanks, jb747. Interesting to find yet more things that automatic systems do and must be remembered along with everything else. I saw a diagram of the runways and it looked like they had quite a lot of room remaining for a less dramatic deceleration, going by the point where the aircraft turned off the runway, presumably using data from FR24 or similar.

I imagine that the pilots had a lot of things on their mind all at once. Takeoffs happen all the time but rejected takeoffs must surely be rare creatures encountered mostly in sims.

I dare say that emotions aboard would have been in a tangle, beginning with the passengers confused, uncertain, and likely upset about their expensive travel arrangements coming unstuck.

I looked into “Fragrant Harbour” on PPRune for more information and the only real news there was that the flight and cabin crew would not be paid anything at all for the flight - if I can call it that for something that never left the ground.

While it’s monstrous to suggest that money would impact crew decisions on safety, contemplating a financial shortfall can hardly have helped maintain an atmosphere of equanimity.
 

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