LOT Gear Up landing. WOW

[dicko]

AP Article today on Yahoo finance stated that "the planes central hydraulic system failed a half-hour into the flight" from Newark.

 

[airplane wizard]

AP Article today on Yahoo finance stated that "the planes central hydraulic system failed a half-hour into the flight" from Newark.

Yet they crossed the ocean like that.....

 

[dicko]

Yet they crossed the ocean like that.....

Apparently. Without being qualified on the 76 ER, ETOPS, NAT requirements or the LOT Ops Specs it's difficult to comment.

The press is reporting that the Captains last name translated into English means "The Crow". He can certainly land.

 

[Dumb Pilot]

You do have redundancy with two systems available, one hydraulic system out is not an emergency nor cause to divert. This was a non event until they activated the alternate gear extension and nothing happened, their though process wasn't at all one of doing a belly landing but rather at what weight they were going to do a flaps 20 landing, go back or do it 70,000lbs lighter.

 

[airplane wizard]

You do have redundancy with two systems available, one hydraulic system out is not an emergency nor cause to divert. This was a non event until they activated the alternate gear extension and nothing happened, their though process wasn't at all one of doing a belly landing but rather at what weight they were going to do a flaps 20 landing, go back or do it 70,000lbs lighter.

What happens if you lose the other system?

Does the alternate system electrically unlatch the doors and the gear then "falls" down, or is it hydraulic too?

btw, how is the 787 working for you guys? Many tech issues?

Thanks

 

[Dumb Pilot]

If you lose the center hyd system, then you are down to the alternate extension and It is an electrical command (the same up locks but with a different power source) to release the locks holding the main landing gear doors closed (the weight of the gear is resting on the doors as you place the lever back to neutral after gear retraction) and the nose gear up locks and they just fall into place, then heavy duty springs locks them into place.

I don't really hear too much about the 78 out on the line

 

[aa73]

Don't know about the Poles but my ass would never be crossing the Atlantic with the C HYD system out. The C HYD System on the 767 is the "heavy hitter" system (most hydraulic stuff is on it) and I WOULD declare an emergency. Period. It is nothing to mess around with - ESPECIALLY crossing an ocean.

 

[HalinTexas]

The RAT, 3rd elec. source, is operated on the center system. If suppose if their MEL allowed them to operate with the APU on, and dispatch OK'd it, then maybe. Of course, if they're filed (re-filed) on a "Blue Spruce" route then it's a moot point.

I'm sure curious what really happened, and why the BU system failed.

 

[dicko]

From the LOT Ops Manual:

"Prior to receiving our first 767, Polish engineers asked Boeing to install a system that disables the central hydraulic systen at Pressure Altitudes greater that 50 Feet. Since the system is "Central" it must not be used in anything other than the most serious emergencies."

 

[Dumb Pilot]

http://www.pprune.org/rumours-news/467899-polish-lot-767-wheels-up-landing-12.html

Some pictures there on PPRUNE that show the A/C after it was lifted back on to its gear, regardless of what side of the fence you are (continue/ divert) there is no doubt that the landing was well executed. . It almost looks like the A/C can actually be repaired