Home > Flying, Post installation > Clearing the squawks (part 2)

Clearing the squawks (part 2)

Pat brought along his technician and adjusted the throttle quadrant. We went up for a flight and confirmed the throttle was fixed. We also confirmed the intermittent crosscheck attitude on the PFD. The MFD worked perfectly. We spent some time checking the data between attitude and heading between the PFD and MFD. During the crosscheck attitude on the PFD the data matched very close so whatever was causing the display of the message was intermittent in nature and minor. We also checked out the TAS and it appeared that the TAS was not picking up all of the targets.

After landing we discussed the installation. The only thing we could think off was that the PFD RSM, which is installed on the top of the fuselage, was installed using stainless steel crews. The installation allows for the use of stainless steel screws but Aspen provides brass screws. Since my installation had a large shim installed due to the curvature of the fuselage, the brass screws provided did not fit (see this post for picture of shim). It was possible that the stainless steel screws became magnetized and could be affecting the magnetometer. Pat agreed to replace them with brass. In addition we decided to return the TAS and replace as it appeared the interrogator was not working well. We both agreed that the best place to do this was in Santa Fe and I agreed to bring the airplane back up as soon as possible.

In the meantime with the throttle quadrant fixed and the crosscheck attitude only intermittent and only on the PFD I decided that since I have the EFD1000 MFD which provides me full redundancy of AHRS I would take the airplane up to the practice area over the next couple of days to become more familiar with the system. The weather in Albuquerque was going to be great over the next several days.

Categories: Flying, Post installation
  1. Steve Carter
    January 14, 2012 at 12:18 pm

    I would like to know if while flying in esv mode and a terrain/obstacle warning is issued does it affect your ability to change com or nav frequencies. While flying the garmin GNS500W in IFR IMC conditions this repeated alert prevented me from changing any frequency. When I asked garmin about this they said to turn off the terrain feature. This seems stupid. Will the EFD take these terrain/obstacle cues from the navigator and freeze as well? While in svt or standard mode?


  2. January 16, 2012 at 3:27 pm


    I have never heard of anything like this before. First and foremost we do not “take the terrain/obstacle cues” from the navigator, and when we get our own pop up terrain warning nothing “freezes”. So the answer to your question is no, nothing freezes.

    While I can’t speak for Garmin I did check with my field service engineers and they indicated that they think you are referring to the terrain alert pop up MSG on the GNS530W, which requires a pilot action (button push) to dismiss the message before you can edit anything else. Hopefully this was helpful.

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