Narrative:

While descending on the arrival; the captain noticed smoke and sparks coming from the transponder panel. He instructed me to don my oxygen mask and continue flying. The captain got us priority handling and a high speed descent. We flew direct to the IAF; intercepted the ILS and landed without incident. I have no idea how to prevent something like this. This is the only instance of fire and smoke I have had in thirty years.

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Original NASA ASRS Text

Title: Air Carrier flight crew experiences smoke and sparks emanating from the transponder during descent. The transponder is turned off and the smoke begins to subside. An uneventful landing ensues.

Narrative: While descending on the arrival; the Captain noticed smoke and sparks coming from the transponder panel. He instructed me to don my oxygen mask and continue flying. The Captain got us priority handling and a high speed descent. We flew direct to the IAF; intercepted the ILS and landed without incident. I have no idea how to prevent something like this. This is the only instance of fire and smoke I have had in thirty years.

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.