Narrative:

While en route from elp to cie on J2, our assigned altitude was FL200. It was the captain's leg to fly and I was working the radios. Center assigned us a different frequency and I reported in at FL200, then center asked me to verify my altitude. I then looked at the altimeter and saw we were actually at FL207. At this time the captain disengaged the autoplt and pulled up and leveled off at FL210, and turned off the altitude reporting on the transponder. I reminded him we were assigned FL200. Then he started descending while I cycled the transponder off and on. When we got back to FL200, I turned on altitude reporting and center verified FL200. The problem was initially caused by one person trying to do everything, lack of cockpit management, disruption of crew member duties and relaxed attention on my part, as well as other crew members.

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Original NASA ASRS Text

Title: WHEN CAPT OVERSHOT HIS ASSIGNED ALT HE TURNED OFF TRANSPONDER UNTIL BACK TO PROPER ALT.

Narrative: WHILE ENRTE FROM ELP TO CIE ON J2, OUR ASSIGNED ALT WAS FL200. IT WAS THE CAPT'S LEG TO FLY AND I WAS WORKING THE RADIOS. CENTER ASSIGNED US A DIFFERENT FREQ AND I RPTED IN AT FL200, THEN CENTER ASKED ME TO VERIFY MY ALT. I THEN LOOKED AT THE ALTIMETER AND SAW WE WERE ACTUALLY AT FL207. AT THIS TIME THE CAPT DISENGAGED THE AUTOPLT AND PULLED UP AND LEVELED OFF AT FL210, AND TURNED OFF THE ALT RPTING ON THE XPONDER. I REMINDED HIM WE WERE ASSIGNED FL200. THEN HE STARTED DSNDING WHILE I CYCLED THE XPONDER OFF AND ON. WHEN WE GOT BACK TO FL200, I TURNED ON ALT RPTING AND CENTER VERIFIED FL200. THE PROB WAS INITIALLY CAUSED BY ONE PERSON TRYING TO DO EVERYTHING, LACK OF COCKPIT MGMNT, DISRUPTION OF CREW MEMBER DUTIES AND RELAXED ATTN ON MY PART, AS WELL AS OTHER CREW MEMBERS.

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.