Narrative:

Assigned altitude of 4000 ft. Autoplt engaged at 2500 ft MSL with heading, altitude select, and indicated airspeed on flight director. Captain left departure frequency to talk to company to report times. ATC called with a turn to 010 degrees and switch to 125.8 for another departure frequency. While responding to the call, making a frequency change and making the turn, my attention was diverted from the altitude. The autoplt failed to capture the altitude and consequently passed through the assigned altitude by 500 ft. Captain made the altitude call and we started the correction when ATC called for us to correct the altitude. With low time in type, task priority is extremely important. Always fly the airplane first, one task at a time, and prioritize. Lesson learned!

Google
 

Original NASA ASRS Text

Title: FO OF AN LTT OVERSHOT CLB ALT AFTER DEP DUE TO FLYING TASKS RESULTING IN RECOGNIZING THE ERROR AND CORRECTING BACK AT THE SAME TIME THE CTLR INTERVENED TO INQUIRE OF THEIR ALT.

Narrative: ASSIGNED ALT OF 4000 FT. AUTOPLT ENGAGED AT 2500 FT MSL WITH HDG, ALT SELECT, AND INDICATED AIRSPD ON FLT DIRECTOR. CAPT LEFT DEP FREQ TO TALK TO COMPANY TO RPT TIMES. ATC CALLED WITH A TURN TO 010 DEGS AND SWITCH TO 125.8 FOR ANOTHER DEP FREQ. WHILE RESPONDING TO THE CALL, MAKING A FREQ CHANGE AND MAKING THE TURN, MY ATTN WAS DIVERTED FROM THE ALT. THE AUTOPLT FAILED TO CAPTURE THE ALT AND CONSEQUENTLY PASSED THROUGH THE ASSIGNED ALT BY 500 FT. CAPT MADE THE ALT CALL AND WE STARTED THE CORRECTION WHEN ATC CALLED FOR US TO CORRECT THE ALT. WITH LOW TIME IN TYPE, TASK PRIORITY IS EXTREMELY IMPORTANT. ALWAYS FLY THE AIRPLANE FIRST, ONE TASK AT A TIME, AND PRIORITIZE. 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.