Narrative:

After about 1 hour in the practice area; I self announced on the mdq CTAF as 5 miles northeast. I then approached the airport on a 45 degree angle at 1;500 MSL which is pattern altitude. As I was turning right downwind for runway 36; a light twin passed in front of me. It was traveling west to east at 1;500 ft. It crossed the runway approximately 1/4 of the runway length south of the north end of the runway. I heard no radio call; although I did self announce; and was in communication with another aircraft on the ground. I heard no radio calls from the other aircraft and did not see it again. It was headed east at 750 ft AGL. I always check the airspace north; south and east of the airport when in the vicinity. I have been neglecting the space west at pattern altitude; since our noise abatement procedures request we don't fly there. I will be more observant in the future.

Google
 

Original NASA ASRS Text

Title: A pilot entered the MDQ CTAF traffic pattern had an NMAC with a light twin transiting the pattern at about 1;500 FT.

Narrative: After about 1 hour in the practice area; I self announced on the MDQ CTAF as 5 miles northeast. I then approached the airport on a 45 degree angle at 1;500 MSL which is pattern altitude. As I was turning right downwind for Runway 36; a light twin passed in front of me. It was traveling west to east at 1;500 FT. It crossed the runway approximately 1/4 of the runway length south of the north end of the runway. I heard no radio call; although I did self announce; and was in communication with another aircraft on the ground. I heard no radio calls from the other aircraft and did not see it again. It was headed east at 750 FT AGL. I always check the airspace north; south and east of the airport when in the vicinity. I have been neglecting the space west at pattern altitude; since our noise abatement procedures request we don't fly there. I will be more observant in the future.

Data retrieved from NASA's ASRS site as of April 2012 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.