Narrative:

While flying inbound to dtw airport I told the copilot I was going off of #1 radio to get the ATIS. We were cleared to cross milar intersection at 12000', 250 KTS. When I came back on line from getting ATIS, I noticed we were descending to 10000' and it was set in the altitude alerter. I questioned the copilot about this and he said, 'I thought you just didn't set the altitude in the alerter correctly.' needless to say, I immediately told ZOB we were at 10000' and was that correct. He told me to climb to 11000' and switch to approach. I did and nothing more was said. I called approach when I got on the ground and they said there wasn't any conflict reported. New coplts should be watched carefully, no matter what stage of flight. Lesson learned.

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Original NASA ASRS Text

Title: NEW FO ON ACR MLG CREATES AN ALT DEVIATION WHILE CAPT IS LISTENING TO ATIS.

Narrative: WHILE FLYING INBND TO DTW ARPT I TOLD THE COPLT I WAS GOING OFF OF #1 RADIO TO GET THE ATIS. WE WERE CLRED TO CROSS MILAR INTXN AT 12000', 250 KTS. WHEN I CAME BACK ON LINE FROM GETTING ATIS, I NOTICED WE WERE DSNDING TO 10000' AND IT WAS SET IN THE ALT ALERTER. I QUESTIONED THE COPLT ABOUT THIS AND HE SAID, 'I THOUGHT YOU JUST DIDN'T SET THE ALT IN THE ALERTER CORRECTLY.' NEEDLESS TO SAY, I IMMEDIATELY TOLD ZOB WE WERE AT 10000' AND WAS THAT CORRECT. HE TOLD ME TO CLB TO 11000' AND SWITCH TO APCH. I DID AND NOTHING MORE WAS SAID. I CALLED APCH WHEN I GOT ON THE GND AND THEY SAID THERE WASN'T ANY CONFLICT RPTED. NEW COPLTS SHOULD BE WATCHED CAREFULLY, NO MATTER WHAT STAGE OF FLT. LESSON LEARNED.

Data retrieved from NASA's ASRS site as of July 2007 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.