767-400 question!!!

[aswind]

Hi mates, i have a question.

is the boeing 767-400 fly-by-wire or fly-by-cable?

afaik, the 767-200 and -300 series are fly-by-cable (hope it's correct!), but the -400 is a young airplane and has the nearly same cockpit (and some technologies) of the big 777...

Thanks to everyone...

A.

[FlyVMO]

The 777 is the only fly-by-wire Boeing currently in service.
The 767-400 and the 737NG series both utilize conventional flight controls despite post-dating the 777 design.
FVmo

[Mr @ Spotty M]

I think you will find that the B777 is semi fly-by-wire.
The only true fly-by-wire are the A320 series and later Airbus types, which use a side stick.:ok:

[XPMorten]

Think the 757/767 has FBW spoilers only... .
XPM

[vapilot2004]

The Boeing 777 is a true fly-by-wire system in the sense that in normal operation the control inputs are relayed electronically to the flight control actuators.

In the unlikely event of a complete electrical system or multiple computer system failure, the 777 retains a mechanical backup connecting the pilots to select spoilers (#4 and # 11) and the stabilizer actuators VIA a direct cable link. The alternate pitch trim levers are used to move the stabilizer.

The triple 7's inclusion of a mechanical backup does differ from the Airbus fly-by-wire system - which is why most consider Airbus as having the true (and entirely electronic) fly-by-wire FCS. Look Ma - no cables !
EDIT: Referring to twin-aisle models here.

The 767 (all models) employs a traditional cable/hydraulic actuator FCS.

[Fargoo]

Stab trim and rudder on the 320 have manual backup!

[vapilot2004]

Ah - yes, I see now - Pitch and Yaw have backup. Rudder pedals control that surface directly and stab trim will minimally control the pitch on the A320. :O OOPS - thank you for that.

Is this carried over into the twin aisle aircraft ? As I understood it, there is no mechanical reversion in the very unlikely event of complete FCS failure on the larger model Airbus.

[kenparry]

For XPMorten:

The B757/767 spoilers are signalled mechanically - definitely not FBW

[Swedish Steve]

For XPMorten:
The B757/767 spoilers are signalled mechanically - definitely not FBW
Sorry but you are most definitely incorrect. The B757/767 spoilers are FBW.
I was trying to copy MM 27-61-00 in to here but won't work.
Trust me I changed a spoiler actuator on a B757 last month. Really easy, two hyd pipes and an electrical plug. No rigging involved.

[Swedish Steve]

Think the 757/767 has FBW spoilers only... .
XPM
The Flaps and slats are also FBW.
Also the engine throttles on most B767 ( Not the oldest ones)
are FBW.

[Bolty McBolt]

The Flaps and slats are also FBW.


I haven't seen fly by wire slat/flap sys on a 767.
747-400 yes but not the light twin
Spoilers are definitely FBW and stab trim is electric too on later models

[Swedish Steve]

[QUOTE=Bolty McBolt]I haven't seen fly by wire slat/flap sys on a 767.
747-400 yes but not the light twin
[/QUOTE
Sorry you are right. (Work on too many aircraft thinking of B744)