fly Jamaica 757 crash at Guyana
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Looks like Flaps 20, no reversers, nose gear doors open. With (loss of) L HYD SYS PRESS and R HYD SYS PRESS you are down to reserve brakes and need to do alternate gear and flap extension.
Nemo Me Impune Lacessit
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Market value no more than about $15million, I would think, so probably a write-off but the Boeing Mobile repair team, in their specially fitted out C130, have pulled off some amazing repairs in the past, just have to wait and see what the underwriters say, new engine, new main gear, new wing + labour! 
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Never mind, I answered my own question, sort of. While it's clear the lady died, since she was not one of those who were initially injured it still leaves a bit of a question as to how she passed.
This article provides a bit more info though doesn't answer the question. May she RIP.
https://www.cp24.com/news/canadian-w...yana-1.4181624
This article provides a bit more info though doesn't answer the question. May she RIP.
https://www.cp24.com/news/canadian-w...yana-1.4181624
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At 86 years of age it's quite probable that the shock factor may have triggered cardiac problems for example. We also don't know what her medical condition was before the accident.
FlightGlobal reports that some time after the accident she was taken to hospital by her family and found to have a fractured skull. The assumption, whether correct or not, is that she suffered the injury during the crash.
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I would have liked something a bit longer. Awaiting the replies from those with access to the 757 minimum rwy length charts. Was anywhere longer available ? Two hydro systems out also means landing at the nearest suitable airfield. Here we go again with the "nearest" and/or "suitable" debate again (!) Pictures of the crash site show how close to tipping over the edge they came, writing off the aircraft and possibly one death. I always treated minimum landing runway lengths with great care. Not suggesting these guys did anything less. Tough call.
Buttonpusher
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At 240,000 lbs Flaps 20 looks like 7100' dry runway.
At 140,000 lbs Flaps 20 it's 5000' dry runway.
Doesn't include a 15% safety margin to get the required distance.
Fly Jamaica's numbers could be different .
At 140,000 lbs Flaps 20 it's 5000' dry runway.
Doesn't include a 15% safety margin to get the required distance.
Fly Jamaica's numbers could be different .
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Guys, there seems to be an assumption of double hydraulic system failure, this is very unlikely. It looks to me like left system failure only, no emergency was declared, which would have been required after double hydraulic system failure, ie "declare an emergency and plan to land etc...."
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One thing I have noticed flying on several different airline jumpseats is that almost universally the accumulator showed a high leakdown rate on the 757/767 on smaller airlines. They are supposed to be checked routinely by maintenance for the leakdown rate but in practice it does not seem to happen. If the accumulator is going to lose 50% of its charge in a hour it’s not going to stop you when needed. If a accumulator has a high leakdown rate write it up! The aircraft is not airworthy.
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Apparently hit by a passenger behind her as she was trying to clear the evac slide. Hugely unfortunate.
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Guys, there seems to be an assumption of double hydraulic system failure, this is very unlikely. It looks to me like left system failure only, no emergency was declared, which would have been required after double hydraulic system failure, ie "declare an emergency and plan to land etc...."
A low pressure switch on the PTU output side which would shut the PTU down if no fluid available in the left. This switch failed and so PTU continued to run trying to compress air instead of oil. This in turn caused an overheat in the right system which required pumps to switched off on that side. It may have only been the EDP which overheated but the little 6 gpm electric pump wasn't much use under that load and voila dual hydraulic failure. At least two identical events and although not perhaps a dual hydraulic failure in the conventional sense, it had the same effect at least for a while. Right system could be used for approach if overheat was cleared.
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Larryboy ; no assumptions really. This is the "rumours" forum and speculative debate is the norm & often, quite interesting.
FLCH ; Thanks. 2200 metres is roughly 6600ft which makes the 7700 ft available out of limits for the "speculative" double hydo failure. Why they decided to turn back to a shortish dep airfield will be interesting.
Starbear ; Mate of mine had the exact same situation you describe coming out of a European airfield. Very experienced Skipper decided not to declare urgency. He felt no -one would really understand in that part of the world. ("Pan Pan Pan"......yeah, right ) L & R out, over max Landing weight he calmly went to a nice much longer runway, nearby, full facilties, configured for the approach in the hold and did a nice job. Got overheated brakes though but Firefighters were on him in a remote area with hoses pointed at the brakes as all disembarked. Mate tells me that the afterparty was the stuff of legend..
FLCH ; Thanks. 2200 metres is roughly 6600ft which makes the 7700 ft available out of limits for the "speculative" double hydo failure. Why they decided to turn back to a shortish dep airfield will be interesting.
Starbear ; Mate of mine had the exact same situation you describe coming out of a European airfield. Very experienced Skipper decided not to declare urgency. He felt no -one would really understand in that part of the world. ("Pan Pan Pan"......yeah, right ) L & R out, over max Landing weight he calmly went to a nice much longer runway, nearby, full facilties, configured for the approach in the hold and did a nice job. Got overheated brakes though but Firefighters were on him in a remote area with hoses pointed at the brakes as all disembarked. Mate tells me that the afterparty was the stuff of legend..
Wow, did they actually repair and return it to service? I assumed they would have just scrapped it - if it was repaired the damage to the right wing must have been more superficial that it looked...
