“I experienced a catastrophic
failure of the Chelton Sport/Crossbox 425 coupling, fortunately in VFR
weather. This event was I believe a couple years after
the combination was introduced to the market as tested and approved.
I fully understand that these complex systems are trial and error (sorry about
the lives at risk) but how can we accept that the system which has been tweaked
by that same staff at Crossbox is this time truly ready for prime
time? Crossbow has given us reasons to believe them now. It would
be interesting if Crossbow would also disclose to us where they went wrong
the first time. “
Robert,
I am sorry to hear that you have
experienced trouble with the NAV425EX. Did you contact us for support at that
time? If you still have the serial number or part number of the unit, I can
verify for you if you had the updates that we started in April of 2006. The
failure you describe may be related to these updates and the subsequent service
bulletin. In addition, if you still have the flight log you can send it to us
via email and we can playback the data in order to verify the performance and
get a better understanding of the cause.
In regards to your request to post the
fixes made to the unit, Crossbow has done this. In fact, we have posted the
process and fixes put that were put in place for this update in great detail. I
personally feel that we have provided more detail than any other manufacturer
that I am aware of including some of the major players in the aviation industry.
You can find the full posting of all of the service bulletins we have issued
using the following link.
http://www.xbow.com/Support/service_letters.aspx
Crossbow has completed over 40 of these updates since April
of 2006 and we have also continued to sell large numbers of NAV42X variants to
other EFIS manufacturers and general aviation consumers. Crossbow is an
ISO9001 and FAA certified manufacturing facility and has been in business for
over 10 years. We continue to be a market leader in inertial systems and we
are confident in the fix that we have put in place. If you or any of our
customers have any questions or need any technical assistance, please do not
hesitate to contact us. We are 100% committed to our customers and our
products.
Sincerely,
Michael Smith
Application Engineer Inertial Systems
Crossbow Technology
Email: msmith@xbow.com
Phone: 408-965-3388