Aspen Service Bulletin Addresses Display Resets

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Aspen Avionics has issued a mandatory service bulletin identifying how to avoid issues with the repeated inflight system resets recently noted in an FAA Special Airworthiness Information Bulletin (SAIB). As previously reported by AVweb, the resets are occurring in a small number of Aspen Evolution EFD1000 Primary Flight Display (PFD), EFD1000 Multi-Function Display (MFD) and EFD500 MFD units with software version 2.9 and the ADS-B In (FIS-B) Weather Interface option installed. For ADS-B enabled units running version 2.9, Aspen says disabling ADS-B input will prevent the resets from occurring until a more permanent fix can be developed.

“The condition is apparently caused by unexpected/malformed data being transmitted from some FIS-B ground stations that is not rejected by the EFD1000/500 system,” the company said. “Since it is caused by the data content of the specific ground station you are near, not all aircraft are affected equally.” Aspen told AVweb that they have received fewer than 15 reports of display reset incidents, and that the occurrences were “geographically isolated” to the southwestern U.S. The company also stated that they have not had any additional reports since the SAIB was published. They are working on a software upgrade to address the issue.

No action is required and no display reset issues have been reported for EFD1000 and EFD500 systems that do not have software version 2.9 installed and ADS-B IN enabled. The service bulletin was distributed to Aspen owners and dealers last week.

Comments (1)

The AD 2019-1-2 states that in C, applicability, that ALL three items C 1 i-iii must apply to be applicable. C1i is the unit software is ver 2.9, C1ii is the FIS-B Weather interface is active and C1iii in installs that do not have the three back up instruments (altitude, attitude and airspeed) installed.
Since most, if not all, installs require the three back up instruments be present to be meet the requirements of the STC, it seems that the AD would not apply to most installs.

Having said that, I do think this is serious and the software update should be installed when available and it's relatively easy to turn the FIS-B input to off in the set up menu (Aspen says an update for ver 2.9 software is done, waiting approval) I have an Aspen EDF 1000 Pro with Fis-B available through a Garmin GDL 88 and have had zero issues, but I live on the east coast.

I believe I am reading the AD correctly, not trying to make an end around, but the AD is very specific and appears that it doesn't apply to many installs since the three backup instruments are required. Perhaps the installs using a second EFD for the back up instrument requirement would be affected, but single unit installs require the three instrument back ups to be present. Most glass cockpits have the three back up instruments installed in the pilots field of view,

B Duffey

Posted by: Benjamin Duffey | January 30, 2019 9:39 AM    Report this comment

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