LOT 767 Rumot.....

T

TallFlyer

Well-Known Member
Found this posted on the FB page of a fairly respected aviation author:

Polish 767 belly landing may have been caused by a tripped alternate gear extension CB not known of by the pilots or even the airline.
I heard this through the grapevine. LOT had a low center hyd message after takeoff. They turned off the center system for the flight, but quantity was too low to get the gear down on arrival. The alt gear extension in the 767 is an electric motor that unlatches the gear up-locks. They tried the switch to no avail. Later, post-crash, they found an alt gear cb tripped. Neither the crew nor the airline new about the cb and there is no EICAS message for this cb. My books don't show the CB but my 767 books are way out of date.
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What are the flipping odds that you'd have an hydraulic failure AND a tripped Emer gear extention circuit breaker at the same time? Murphy was flying that day...
 
I figured there had to be some freak set of circumstances to cause this. Well, I guess there will be an update to the manual pointing out that CB!
 
Boris Badenov said:
What are the flipping odds that you'd have an hydraulic failure AND a tripped Emer gear extention circuit breaker at the same time? Murphy was flying that day...
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Is that a CB thats accessible to the crew in the cockpit? Or is it one of those located in some hellhole somewhere?
 
We've got some that are inaccessible to the flight crew in the E&E compartment. "Technically" you can get down there, but it's only really approved for getting down there when you're hiding from the Po-Po.
 
I would expect that that CB will be very well documented by every 767 operator within a week if this is true.
 
Oh we already know about it.

Also if you have an electrical problem and run the battery out, that gear's not coming down either! :)
 
Can't find a breaker schematic in my manuals.

That's not terribly unexpected, though; my manuals go into about as much depth as "Put handle down. Gear come down. If gear not come down, Grok get QRH. Grok do QRH." :)
 
Yeah, they probably wanted to get home. But if it was me coming out of Warsaw headed for Newark, I'd go back for sure. Nice hotel with a Champs there. Great layover.
 
DE727UPS said:
Yeah, they probably wanted to get home. But if it was me coming out of Warsaw headed for Newark, I'd go back for sure. Nice hotel with a Champs there. Great layover.
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Think about it, would you want to go back to Newark though?
 
DE727UPS said:
Yeah, they probably wanted to get home. But if it was me coming out of Warsaw headed for Newark, I'd go back for sure. Nice hotel with a Champs there. Great layover.
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Warsaw or Newark? I'm doing a EWR-AMS-EWR next month and the last time I hit a Champs I didn't poop right for a day.
 
Doug Taylor said:
Also if you have an electrical problem and run the battery out, that gear's not coming down either! :)
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We've got the same problem with the CRJ700, except it's the hydraulic system. Stupid over-center locks.

dasleben said:
Actually, we can go 120 ETOPS with a center hydraulic system failure. Not that you really would, but you can.
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How comfortable would your SOC/OCC/whatever be with a captain telling them that just because you can doesn't mean you should? Over here something like that would probably get bumped up to the VIP level and then get the crew disciplined.
 
Pépé le Pilot said:
Do you lose much stuff with center hyd fail ? Is it like loosing Green on the 320 ?
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You'd lose primary gear, flaps, slats, and nosewheel steering. I think a couple spoiler panels may stop working too. Nothing important... :)

BobDDuck said:
How comfortable would your SOC/OCC/whatever be with a captain telling them that just because you can doesn't mean you should? Over here something like that would probably get bumped up to the VIP level and then get the crew disciplined.
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Don't shoot the messenger! Like I said...you could go, but not that you would. The airplane would still fly fine, but the consideration at that point would be a lack of a hydraulic motor generator over the pond. Granted, if you're down to only the HMG you're having a really bad day...

EDIT: Actually, I misread your post. I'm pretty sure the company would support a return for that, or at least a diversion to an airport with maintenance prior to the crossing. Going over the pond with that kind of thing going on (when you don't know what caused it) wouldn't be a smart move, and the company also knows it.
 
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