IFD540 Service Information Letter

We have issued a Service Information Letter regarding CDI errors on approaches where the FAF leg is not aligned with the final approach course. This effects less than one percent, 106, of all approaches in the database.  The solution for this error has been added to software release 10.1 that will be available in the next few weeks. Per the SIL, affected approaches can be flown provided that you use Vectors To Final.

 

The full SIL (606-00182-001) can be located here: http://www.avidyne.com/support/downloads/index.asp

Well,  that's ONE way of getting the FAA to sign off 10.1 sooner...

brou0040 wrote: Interesting, can you explain?

Only reason to think otherwise is that per the AD; the Boston FSDO has AMOC oversight.

There is some sort of verbiage in the priority triaging of certification projects as to safety of operation. Who knows, maybe it will help a bit.

We are certainly not pointing fingers at the FAA on this.  We've been working with them for the past week on the topic after we alerted them of the condition and sent a copy of the SIL to them and the user community.

I will say this was NOT a code error.   The MOPS are extremely ambiguous on the topic and the way we coded it pre-10.1 was not in accordance with the current way to interpret the MOPS.

The SIL describes the conditions under which this issue manifests itself and the good news is that the FAA is highly motivated to speed the approval of Release 10.1 now as a result of the AD.   Things on the approval front seem to be speeding up rapidly.

I have an IFD540, s/n M144432750 which is not installed yet (I'm waiting for my IFD440 and will install both together). I heard that some early IFD 540s may be in need of a modification to the I/O board as there was a post about a ferrite core causing I/O board initialization problems on early units. Can anyone at Avidyne comment on this? Does my unit need to go back to Avidyne for any kind of hardware upgrade? I would rather take care of this now rather than waiting for the 440 to arrive and then taking the plane down again. Who should I talk to about this?

Bob,

scott wrote: I have an IFD540, s/n M144432750 which is not installed yet (I'm waiting for my IFD440 and will install both together). I heard that some early IFD 540s may be in need of a modification to the I/O board as there was a post about a ferrite core causing I/O board initialization problems on early units. Can anyone at Avidyne comment on this? Does my unit need to go back to Avidyne for any kind of hardware upgrade? I would rather take care of this now rather than waiting for the 440 to arrive and then taking the plane down again. Who should I talk to about this?