[simpits-tech] Jetstream Update

[Roy Coates]

On Mon, 21 Jul 2003, Darren Beaumont wrote:

> Quite a few a/c have the roll/pitch disconnect system, Saab 340, Saab
> 2000, ERJ 13x/14x etc.  The idea is if there is a control
> jam/restriction, you can either pull the handle for either pitch, roll
> or both, so that the unaffected side maintains some sort of control - as
> you've found out the only way to reset the system once on the ground is
> to start opening up panels etc.  The system can also operate if a higher
> than normal force is used, approx 45-50lbs of force for the Saab 340,
> which temporarily disconnects the affected channel and is automatically
> reset when the force returns to normal.
>
> It should all be in Chapter 27 of the Maintenance Manual, how the system
> works and how to reset the system.
>
> Its an ingenious idea and has saved a few people and a/c from an
> untimely end.
>
> Good luck on the Jetstream.
>
> Darren


Cheers Darren. Not having much of an interest in this type of aircraft I
was unaware of such a system. Having all the MOM's though has been quite
an education and the disconnect system seems pretty clever. There are
indeed clutches elsewhere in the system to handle disconnects under other
conditions.

Roy.