Narrative:

Aircraft was assigned off of a vector to fly direct to tfd VOR and climb and maintain FL210 when captain was reviewing SID, failed to level off at assigned altitude. At a +300 ft altitude, the captain initiated corrective action.

Google
 

Original NASA ASRS Text

Title: A LEAR 35 PIC CLBS 300 FT ABOVE HIS ASSIGNED INTERMEDIATE ALT BEFORE RETURNING TO FL210 NEAR TFD, AZ.

Narrative: ACFT WAS ASSIGNED OFF OF A VECTOR TO FLY DIRECT TO TFD VOR AND CLB AND MAINTAIN FL210 WHEN CAPT WAS REVIEWING SID, FAILED TO LEVEL OFF AT ASSIGNED ALT. AT A +300 FT ALT, THE CAPT INITIATED CORRECTIVE ACTION.

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.