The first one that failed had been tagged as bad by the JDM app as I went to update the data in it. But this one failed between flights 6 days apart whilst sitting in the plane. The unit looked good on boot up, with the database revision showing as current. I tried the card in both the 530W and 430W with the same result. Neither unit would use the card which left me with a dumb GPS. "Dumb" meaning the obvious, in that didn't know anything about any airports or other facilities. Less obvious was that it gave me a message that all course data would be shown relative to True North. Confusing until I realized that magnetic variation was among the data it didn't have available. Radios still worked fine, but I had to manually enter all frequencies into the unit with the bad card
.Fortunately I have 2 sets of these cards, so I put one of my others into the 430W, which had the last data revision, but since the 530W was current, no real problem other than the units wouldn't cross-fill.
After returning from PDX I double-checked, reloading the current revision into the bad card (and a spare good one). The reload succeeded, but the card still was still rejected by the 430W.
Replacement card: $210.00 plus shipping. Lesson: Always be sure to have spares available in the plane
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