A B777 first officer's window developed an air leak after takeoff which made communications very dif...

Attributes
ACN	853789
Time
Date	200909
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZZ.Airport
State Reference	FO
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Initial Climb
Flight Plan	IFR
Component
Aircraft Component	Cockpit Window
Person 1
Function	Captain Pilot Flying
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

Immediately after departing; first officer's window developed a loud air leak that grew louder as we climbed. At pressure differential of 3.1 conversation was nearly impossible; we leveled off and slowed aircraft and confirmed window was properly closed. Returned to land; declared an emergency due to overweight landing (542;000 pounds). Touchdown and rollout were uneventful. Taxied to hardstand where maintenance determined that the window seal had failed and replaced it. Overweight landing inspection completed. Departed for our original destination.

Original NASA ASRS Text

Title: A B777 First Officer's window developed an air leak after takeoff which made communications very difficult. An emergency was declared because of the impending overweight landing as the crew returned to the departure airport.

Narrative: Immediately after departing; First Officer's window developed a loud air leak that grew louder as we climbed. At pressure differential of 3.1 conversation was nearly impossible; We leveled off and slowed aircraft and confirmed window was properly closed. Returned to land; declared an emergency due to overweight landing (542;000 LBS). Touchdown and rollout were uneventful. Taxied to hardstand where Maintenance determined that the window seal had failed and replaced it. Overweight landing inspection completed. Departed for our original destination.

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.

A B777 first officer's window developed an air leak after takeoff which made communications very difficult. An emergency was declared because of the impending overweight landing as the crew returned to the departure airport.