Narrative:

We were cleared direct to jfk and to descend to 11000 ft. Then descent to 7000 ft outside 12 mi limit. We discussed high speed. I was hand flying no autoplt, no autothrottle with flight director. I asked the captain to insert a waypoint at the 12 mi limit so I could slow accordingly. I was leveling at 7000 ft. I watched the captain do the inputs into the FMC CDU. When he finished, he looked up and noticed I had drifted through my altitude. He pulled the aircraft back to 7000 ft. Contributing: mainly fatigue, causing slow scan, easily distraction. No autoplt, no autothrottle. FMC inputs at low altitudes distracting. Not utilizing available equipment.

Related reports:

Google
 

Original NASA ASRS Text

Title: ACR AFTER ALL NIGHT FLT RPTS FATIGUE AND DISTR CONTRIBUTED TO DSCNT BELOW ASSIGNED ALT.

Narrative: WE WERE CLRED DIRECT TO JFK AND TO DSND TO 11000 FT. THEN DSCNT TO 7000 FT OUTSIDE 12 MI LIMIT. WE DISCUSSED HIGH SPD. I WAS HAND FLYING NO AUTOPLT, NO AUTOTHROTTLE WITH FLT DIRECTOR. I ASKED THE CAPT TO INSERT A WAYPOINT AT THE 12 MI LIMIT SO I COULD SLOW ACCORDINGLY. I WAS LEVELING AT 7000 FT. I WATCHED THE CAPT DO THE INPUTS INTO THE FMC CDU. WHEN HE FINISHED, HE LOOKED UP AND NOTICED I HAD DRIFTED THROUGH MY ALT. HE PULLED THE ACFT BACK TO 7000 FT. CONTRIBUTING: MAINLY FATIGUE, CAUSING SLOW SCAN, EASILY DISTR. NO AUTOPLT, NO AUTOTHROTTLE. FMC INPUTS AT LOW ALTS DISTRACTING. NOT UTILIZING AVAILABLE EQUIP.

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.