Narrative:

On post flight we discovered another compass deviation; a compass card blank with all corrections erased and blank. There also was no compass deviation date or data located on card. It was highly unusual. This was the second wifi aircraft with a problem; the other aircraft had a compass deviation of 45 degrees and was written up accordingly. Both aircraft will require compass rose swing. With two problems with compasses on wifi aircraft in one tour I am checking all wifi aircraft for problems and correct deviation data.

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Original NASA ASRS Text

Title: A CE-750 Standby Compass error of approximately 25 degrees was not recorded on the Compass Card after a WIFI system installation.

Narrative: On post flight we discovered another compass deviation; a compass card blank with all corrections erased and blank. There also was no compass deviation date or data located on card. It was highly unusual. This was the second WiFi aircraft with a problem; the other aircraft had a compass deviation of 45 degrees and was written up accordingly. Both aircraft will require compass rose swing. With two problems with compasses on WiFi aircraft in one tour I am checking all WiFi aircraft for problems and correct deviation data.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.