Reading here for quite some while I'm kind of amused about how far the
theories have gone. Furthermore I also noticed a remarkable lack of system
knowledge leading to funny assumptions and - in your case - to funny "nope"
and "no, never" statements which are not true in every case. For large
transports it is a common abnormal handling to switch ALL fuel pumps on and
OPEN the crossfeed in case of low fuel quantity (e.g. close to or at final
reserve). Furthermore usually a (+) pitch limit is present. I'm not really
familiar with the twin Boeing systems but I'm sure they don't vary too much
from MD and Airbus. So a "never" regarding both engines fed from the same
tank ist not consistent as with open crossfeed ANY engine can be fed from
ANY tank that contains fuel.

This is just to clarify some system behaviour and not issueing a new rumour.
As a retired pilot with some 5 digit flight hours in large transports I will
never add any gossip... :-)) but just wait for te official outcome.
Everything else is useless.

--
Oskar
- - - - -
Remember, in the great scheme of things, we're all small potatoes...

"Bertie the Bunyip" schrieb im Newsbeitrag
.. .
"Al G" wrote in
:


"WingFlaps" wrote in message
news:b9b83f65-f3b4-4e65-86d4-8fe48425c829
@p69g2000hsa.googlegroups.com.
.. On Jan 23, 5:58 am, D Ramapriya wrote:
On Jan 22, 8:33 pm, Thomas Borchert
wrote:

D,

Here's an intriguing take on what might have caused the 777's
engine to shut down.

Oh, one more thing: We don't know the engines "shut down" as you
put it. As you seem to care a great deal about aircraft safety, why
not try some accuracy?

I was merely citing the article which begins with, "Transport
Department investigators are probing the possibility a crossed line
diverted a call to the Boeing 777, interfering with its computers and
shutting down the engines."

Ergo, that isn't my verdict (for the want of a better term).

And the article itself is all of ten sentences with no apparent
theorizing by the journalist but more a collage of cites of among
others a Boeing engineer and an incident involving an inadvertent
call transfer into an airplane flight deck.

Ramapriya

The chances of a cell phone affecting a flight computer in this way
are so slight as to be negligible- cell phones don't generate that
much power (IMHO). Perhaps someone who knows the prelanding checks
might tell us if both engines are coupled to the same tank?


No, never.

It so, it is far more likely to be a fuel issue.

Cheers

I believe the engines each feed from a tank in the wing they are
attached to. Redundancy required separate fuel supplies, fuel
controls, engine controls etc. There are very few items in common.
if it was a software issue, it would be interesting to find out
why it
had not manifested itself in 6 years and 20,000+ hours.



Yeah, that's right, it's tank to engine for all takeoffs and landings.

Bertie