I have seen that indication when the antenna did not have a clear view
of the sky.

The installed aircraft was an EADS/Socata TB-9 with gull wing doors.
Coming out of the pad, the pilot's door when up (as it was in the
summer) would obscure much of the sky and not allow the GPS to get a
position. Resolved by removing the blockage by repositioning the plane
or lowering the door. The antenna in this case was on the roof of the
cabin between the two gull-wing-doors.

Peter wrote:
http://www.peter2000.co.uk/aviation/kln94-failure/

This unit has been working perfectly for four years, and works fine
now.


Peter.
--
Return address is invalid to help stop junk mail.
E-mail replies to but remove the X and the Y.