Narrative:

After leveloff at FL290, noticed the altimeter was not set at 29.92. We missed setting the altimeter at the transition altitude, resulting in being 200 ft low. We corrected our altitude immediately. One reason I can attribute to this error is fatigue, as I had a restless night on a minimum overnight the night before. I am very prudent about ensuring that 29.92 is set at the transition altitude. One other contributing factor could have been a distraction in the cockpit while passing the transition altitude. There was a jump seater in the cockpit who I briefed and told him he was part of the crew and to let us known if he saw anything amiss. In spite of this, all 3 of us missed this error. In the future, I will ensure I reverify the altimeter is set at 29.92 in the climb at transition altitude if a distraction occurs at that point in time.

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Original NASA ASRS Text

Title: AN ACR PIC FAILS TO INSURE THAT THE ALTIMETER IS SET TO THE 29 PT 92 AT FL180 IN CLB TO FL290 ON FREQ WITH ZZZ, US.

Narrative: AFTER LEVELOFF AT FL290, NOTICED THE ALTIMETER WAS NOT SET AT 29.92. WE MISSED SETTING THE ALTIMETER AT THE TRANSITION ALT, RESULTING IN BEING 200 FT LOW. WE CORRECTED OUR ALT IMMEDIATELY. ONE REASON I CAN ATTRIBUTE TO THIS ERROR IS FATIGUE, AS I HAD A RESTLESS NIGHT ON A MINIMUM OVERNIGHT THE NIGHT BEFORE. I AM VERY PRUDENT ABOUT ENSURING THAT 29.92 IS SET AT THE TRANSITION ALT. ONE OTHER CONTRIBUTING FACTOR COULD HAVE BEEN A DISTR IN THE COCKPIT WHILE PASSING THE TRANSITION ALT. THERE WAS A JUMP SEATER IN THE COCKPIT WHO I BRIEFED AND TOLD HIM HE WAS PART OF THE CREW AND TO LET US KNOWN IF HE SAW ANYTHING AMISS. IN SPITE OF THIS, ALL 3 OF US MISSED THIS ERROR. IN THE FUTURE, I WILL ENSURE I REVERIFY THE ALTIMETER IS SET AT 29.92 IN THE CLB AT TRANSITION ALT IF A DISTR OCCURS AT THAT POINT IN TIME.

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.