Narrative:

Altitude deviation due to failure of copilot pfd. Controls were xferred to captain. Deviation of 500 ft. Pfd failed and came on several times after initial failure.

Google
 

Original NASA ASRS Text

Title: A C560 CREW OVERSHOT ASSIGNED ALT ON DEP.

Narrative: ALTDEV DUE TO FAILURE OF COPLT PFD. CTLS WERE XFERRED TO CAPT. DEV OF 500 FT. PFD FAILED AND CAME ON SEVERAL TIMES AFTER INITIAL FAILURE.

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.