Something similar that might be relevant - When the Embraer 145 was
introduced in the UK there were a number of incidents of loss of trim as the
aircraft accelerated and climbed. It turned out that the pilots were
holding in the necessary forward stick until the pressure built up and then
trimming (or trying to) and the pressure was too much for the motor to cope
with. The solution was to trim more often at lower pressures. A search on
the AAIB website will turn up the necessary.
Simon
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Jos Okhuijsen
Subject: Re: Europa-List: Electric trim problems.
Hi Paul,
There was a similar thread, which started about the flap motor here some
time ago.
Somebody advised to hang a lamp over the servo motor, to isolate switches,
wiring and relays. I would go for that. I've decided to add bright leds,
one for up, one for down with their diode function, to the panel, above
and below the indicator. This because it will help the diagnostics and
hopefully prevent accidental actuation of the trim buttons on the stick.
I've heard about an accident, where one of the factors was inadvertely
trim up during takeoff. Other then that, i know that intermittend faults
are really difficult to solve. The only way to do it is by try and error,
first starting with the replacement of most suspect parts. First problem
here is that nobody seems to have an idea what part to suspect first, and
second is, that the problem part of the equasion might happen at a time
where you can't afford it.
Regards,
Jos Okhuijsen
|