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Old March 8th 07, 07:32 AM posted to rec.aviation.ifr
Jim Macklin
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Posts: 2,070
Default G430 RAIM failure

maybe
http://gps.faa.gov/Library/Data/SatN...-2005-text.htm


"G. Sylvester" wrote in message
...
|I went up for currency with my (former) CFII. We were
flying back to
| San Carlos (KSQL) and on the GPS 30 approach. We were
cleared to depart
| OSI at a heading of 140. Norcal informed that they are
going to fly us
| 7 miles past AMEBY. They flew us about 3 miles east south
east of AMEBY
| when they had us do a left turn direct AMEBY. I was
perfectly
| established and 2 miles out from the FAF the Garmin 430
went into
| approach mode. I had the needles perfectly centered about
1 mile from
| CUZUP (FAF) when I was kicked out of approach mode. We
stayed at that
| altitude as we are very familiar with the approach and
terrain and we
| skimmed one very thin cloud for about 5 seconds and then
went fully
| visual. During that time my CFII did a RAIM check. I
thought it passed
| but maybe I'm wrong. On the ground, he was unsure why we
were kicked
| out of approach mode. He thought it might be because we
were more than
| 25 (?) degrees off of the AMEBY-CUZUP course but then
again it
| definitely went into approach mode before that. We were
kicked out
| while theh needles were dead centered.
|
| Any ideas?
|
| Gerald