Narrative:

Captain flying aircraft at 7000 ft, heading 250 degrees, northeast of ord on vector to runway 9L with autoplt on. Government aircraft parked on the military ramp. Clicked off autoplt to get a better view. Noticed aircraft was in a descent at approximately 6700 ft. Initiated correction and received ATC transmission 'air carrier X maintain 7000 ft, turn right to heading 270 degrees.' complied with clearance.

Google
 

Original NASA ASRS Text

Title: AN F100 FLT CREW GETS DISTRACTED WHILE SIGHT-SEEING RESULTING IN AN ALTDEV.

Narrative: CAPT FLYING ACFT AT 7000 FT, HEADING 250 DEGS, NE OF ORD ON VECTOR TO RWY 9L WITH AUTOPLT ON. GOV ACFT PARKED ON THE MIL RAMP. CLICKED OFF AUTOPLT TO GET A BETTER VIEW. NOTICED ACFT WAS IN A DSCNT AT APPROX 6700 FT. INITIATED CORRECTION AND RECEIVED ATC XMISSION 'ACR X MAINTAIN 7000 FT, TURN R TO HEADING 270 DEGS.' COMPLIED WITH CLRNC.

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.