Narrative:

Left rear emergency window blew out of small transport while in-flight. Slowed aircraft down immediately and landed without incident or difficulty in performance. Since this was not my airplane I reported to the mechanic at FBO aviation for his record and/or judgement on a service bulletin and to notify the owner. The airplane was a model 1965.

Google
 

Original NASA ASRS Text

Title: GA SMT LOST AN EMER ACCESS WINDOW AT CRUISE ALT.

Narrative: L REAR EMER WINDOW BLEW OUT OF SMT WHILE INFLT. SLOWED ACFT DOWN IMMEDIATELY AND LANDED WITHOUT INCIDENT OR DIFFICULTY IN PERFORMANCE. SINCE THIS WAS NOT MY AIRPLANE I RPTED TO THE MECH AT FBO AVIATION FOR HIS RECORD AND/OR JUDGEMENT ON A SVC BULLETIN AND TO NOTIFY THE OWNER. THE AIRPLANE WAS A MODEL 1965.

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.