Heathrow = Thrust Reversers deployed

Bertie the Bunyip wrote:

Eeyore wrote
Bertie the Bunyip wrote:
Eeyore wrote

How about digital equipment failure (soft or hard)? No, I'm not
777 qualified.

That seems a possibility although how 2 independent systems (one FADEC
on each engine) would fail like that is seriously puzzling. Did they
possibly have a recent firmware upgrade ? That's given problems in the
past.

Nope.

Yes it has.


Nope.

This PROVES you WRONG !

"We have received a report of two occurrences of engine thrust rollback
(reduction) during takeoff on Boeing Model 777-300ER series airplanes powered
by GE Model GE90-115B engines.

Investigation indicates that these events are the results of a software
algorithm in the FADEC that was introduced in software version A.0.4.5
(GE90-100 Service Bulletin 730021). "

http://www.airweb.faa.gov/Regulatory...d!OpenDocument

Graham

Eeyore wrote in
:



Bertie the Bunyip wrote:

Eeyore wrote
Bertie the Bunyip wrote:
Eeyore wrote

How about digital equipment failure (soft or hard)? No, I'm
not 777 qualified.

That seems a possibility although how 2 independent systems (one
FADEC on each engine) would fail like that is seriously
puzzling. Did they possibly have a recent firmware upgrade ?
That's given problems in the past.

Nope.

Yes it has.


Nope.

This PROVES you WRONG !

"We have received a report of two occurrences of engine thrust
rollback (reduction) during takeoff on Boeing Model 777-300ER series
airplanes powered by GE Model GE90-115B engines.

Investigation indicates that these events are the results of a
software algorithm in the FADEC that was introduced in software
version A.0.4.5 (GE90-100 Service Bulletin 730021). "

http://www.airweb.faa.gov/Regulatory...y/rgAD.nsf/075
7
7b0b9213888985256930005117ca/0dd44fe2beb1f516862571f9006b5dad!
OpenDocum
ent



Nope, it doesn't.

Wannabe boi.


Bertie

Eeyore writes:

This PROVES you WRONG !

"We have received a report of two occurrences of engine thrust rollback
(reduction) during takeoff on Boeing Model 777-300ER series airplanes powered
by GE Model GE90-115B engines.

Investigation indicates that these events are the results of a software
algorithm in the FADEC that was introduced in software version A.0.4.5
(GE90-100 Service Bulletin 730021). "

I thought the BA 777 had Rolls-Royce engines.

Mxsmanic wrote in
:

Eeyore writes:

This PROVES you WRONG !

"We have received a report of two occurrences of engine thrust
rollback (reduction) during takeoff on Boeing Model 777-300ER series
airplanes powered by GE Model GE90-115B engines.

Investigation indicates that these events are the results of a
software algorithm in the FADEC that was introduced in software
version A.0.4.5 (GE90-100 Service Bulletin 730021). "

I thought the BA 777 had Rolls-Royce engines.


What does your's have? radio shack speakers?


Bertie

Mxsmanic wrote:

Eeyore writes:

This PROVES you WRONG !

"We have received a report of two occurrences of engine thrust rollback
(reduction) during takeoff on Boeing Model 777-300ER series airplanes powered
by GE Model GE90-115B engines.

Investigation indicates that these events are the results of a software
algorithm in the FADEC that was introduced in software version A.0.4.5
(GE90-100 Service Bulletin 730021). "

I thought the BA 777 had Rolls-Royce engines.

It does. But both the relevant RR and GE engines use FADEC which requires software.
Neither engine has a mechanical throttle. It's controlled ENTIRELY by electronics.

My comment doesn't relate to who made the rotating machinery, but the opportunity
for a software induced failure.

http://en.wikipedia.org/wiki/FADEC

Graham

Eeyore wrote in
:



Mxsmanic wrote:

Eeyore writes:

This PROVES you WRONG !

"We have received a report of two occurrences of engine thrust
rollback (reduction) during takeoff on Boeing Model 777-300ER
series airplanes powered by GE Model GE90-115B engines.

Investigation indicates that these events are the results of a
software algorithm in the FADEC that was introduced in software
version A.0.4.5 (GE90-100 Service Bulletin 730021). "

I thought the BA 777 had Rolls-Royce engines.

It does. But both the relevant RR and GE engines use FADEC which
requires software. Neither engine has a mechanical throttle. It's
controlled ENTIRELY by electronics.

My comment doesn't relate to who made the rotating machinery, but the
opportunity for a software induced failure.

http://en.wikipedia.org/wiki/FADEC



Wow, a clueless-clueless connection. These are always entertaining!

Bertie

Eeyore writes:

It does. But both the relevant RR and GE engines use FADEC which requires software.
Neither engine has a mechanical throttle. It's controlled ENTIRELY by electronics.

Is the FADEC part of the engine or a separate box in the cockpit or elsewhere
(like an autopilot)?

Boeing never should have made the Airbus mistake.

Mxsmanic wrote:

Eeyore writes:

It does. But both the relevant RR and GE engines use FADEC which requires software.
Neither engine has a mechanical throttle. It's controlled ENTIRELY by electronics.

Is the FADEC part of the engine or a separate box in the cockpit or elsewhere
(like an autopilot)?

At least part of the FADEC system is installed right next to the engine itself. It's a
*system* not just one box.


Boeing never should have made the Airbus mistake.

FADEC happened long ago. It's nothing to do with Airbus. Do you think mechanical linkages
are any more reliable ?

Graham

Eeyore writes:

FADEC happened long ago. It's nothing to do with Airbus.

I was thinking about the general move to fly-by-wire in recent Boeing
aircraft.

Do you think mechanical linkages are any more reliable?

Absolutely. How often have mechanical throttle linkages for all engines
broken simultaneously in non-fly-by-wire airliners?

Mxsmanic wrote in
:

Eeyore writes:

FADEC happened long ago. It's nothing to do with Airbus.

I was thinking about the general move to fly-by-wire in recent Boeing
aircraft.

Do you think mechanical linkages are any more reliable?

Absolutely. How often have mechanical throttle linkages for all engines
broken simultaneously in non-fly-by-wire airliners?


Why, you don't fly anyway...


Bertie