Narrative:

Initial clearance altitude departing ord 5000 ft. Captain hand flying leveled off at 5400 ft. We immediately descended to 5000 ft. No known or reported conflict.

Google
 

Original NASA ASRS Text

Title: ALTDEV ON INITIAL LEVELOFF AFTER TKOF.

Narrative: INITIAL CLRNC ALT DEPARTING ORD 5000 FT. CAPT HAND FLYING LEVELED OFF AT 5400 FT. WE IMMEDIATELY DSNDED TO 5000 FT. NO KNOWN OR RPTED CONFLICT.

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.