Narrative:

I saw my flight was showing a diversion. I called the [chief dispatcher] to see why I was not notified of such an event. At that time I was told a window fell off. Flight was already back on the ground. Upon the flight arriving at the gate captain explained the situation.on takeoff roll the captain's window slid open. The captain transferred control to first officer who continued the takeoff roll; captain tried to close the window but window came off tracks and landed in the captains lap. The flight advised tower of the issue; remained in the pattern; and returned to land.

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Original NASA ASRS Text

Title: B737 flight crew and Dispatcher reported the Captain's sliding window had come open during the takeoff roll; then came completely off the track. The flight returned to the departure airport.

Narrative: I saw my flight was showing a diversion. I called the [Chief Dispatcher] to see why I was not notified of such an event. At that time I was told a window fell off. Flight was already back on the ground. Upon the flight arriving at the gate Captain explained the situation.On takeoff roll the Captain's window slid open. The captain transferred control to first officer who continued the takeoff roll; Captain tried to close the window but window came off tracks and landed in the Captains lap. The flight advised tower of the issue; remained in the pattern; and returned to land.

Data retrieved from NASA's ASRS site 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.