Narrative:

The first officer was the pilot flying on takeoff. After 80 KTS and prior to rotation speed; the first officer's window slid completely open. The captain took control of the aircraft; and completed the rotation. Once safely airborne; the first officer attempted to close the window; but it was mechanically impossible. The first officer held the window mostly closed with arm strength so that interphone and radio communication were possible. When the captain realized the window was not going to close; he requested to divert and was given heading and altitude assignments to facilitate a timely landing. The first officer tuned all of the radios; reset the FMC for the landing airport; and ensured all checklist items were complete and resumed ATC communication while the captain flew the aircraft. While on final approach the window fell completely out of the track and onto the first officer. The first officer simply placed the window on his armrest and continued the call outs throughout the landing sequence. Once safely on the ground and clear of both active runways; the captain made a PA explaining what had happened and the reason for diverting. There was not enough time to communicate with flight attendants and passengers. Frankly; it was so loud in the cockpit that it may not have been practical and would likely have caused more alarm than was necessary. Maintenance met the aircraft at the gate; inspected the track; replaced the window; and cleared the logbook. One of the maintenance technicians pointed out that the locking pin on the faulty window was not working correctly.

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Original NASA ASRS Text

Title: B737 flight crew reports the First Officer's sliding window coming open during takeoff with the First Officer as the flying pilot. The Captain assumes control and continues the takeoff while the First Officer attempts without success to close the window. The crew diverts to a suitable airport with ATC assistance and lands safely.

Narrative: The First Officer was the pilot flying on takeoff. After 80 KTS and prior to rotation speed; the First Officer's window slid completely open. The Captain took control of the aircraft; and completed the rotation. Once safely airborne; the First Officer attempted to close the window; but it was mechanically impossible. The First Officer held the window mostly closed with arm strength so that interphone and radio communication were possible. When the Captain realized the window was not going to close; he requested to divert and was given heading and altitude assignments to facilitate a timely landing. The First Officer tuned all of the radios; reset the FMC for the landing airport; and ensured all checklist items were complete and resumed ATC communication while the Captain flew the aircraft. While on final approach the window fell completely out of the track and onto the First Officer. The First Officer simply placed the window on his armrest and continued the call outs throughout the landing sequence. Once safely on the ground and clear of both active runways; the Captain made a PA explaining what had happened and the reason for diverting. There was not enough time to communicate with flight attendants and passengers. Frankly; it was so loud in the cockpit that it may not have been practical and would likely have caused more alarm than was necessary. Maintenance met the aircraft at the gate; inspected the track; replaced the window; and cleared the logbook. One of the Maintenance Technicians pointed out that the locking pin on the faulty window was not working correctly.

Data retrieved from NASA's ASRS site as of July 2013 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.