Cockpit window comes open on takeoff roll. Takeoff aborted.

Attributes
ACN	318985
Time
Date	199510
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bwi
State Reference	MD
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B767-200
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : takeoff other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 60 flight time total : 12000 flight time type : 1300
ASRS Report	318985
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe non adherence other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : rejected takeoff
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

On takeoff at bwi I heard what sounded like an air leak coming from the vicinity of my sliding window. At approximately 60 KTS it popped open (inward about 1-2 inches) but did not slide back. I reached over with my left hand and opened the latch and with my right hand attempted to reclose the window. At the same time the captain rejected the takeoff. The takeoff was rejected at approximately 65-70 KTS in my estimation. All preflight checks and checklists were accomplished. The window appeared shut as per air carrier procedures. It took 1-2 rotations of the crank to reclose the window. We were both satisfied that there was no system fault. Contributing factors: when we accomplished our preflight panel scan, most switches were in the wrong position for flight as maintenance personnel had obviously accomplished their checks the previous night. The cockpit windows by air carrier policy are not to be opened except in emergency. It is my belief that maintenance had opened and not fully or correctly closed the window as it appeared closed but was obviously not latched correctly. Our wakeup at the overnight hotel was XC30 body clock time for an XA35 departure.

Original NASA ASRS Text

Title: COCKPIT WINDOW COMES OPEN ON TKOF ROLL. TKOF ABORTED.

Narrative: ON TKOF AT BWI I HEARD WHAT SOUNDED LIKE AN AIR LEAK COMING FROM THE VICINITY OF MY SLIDING WINDOW. AT APPROX 60 KTS IT POPPED OPEN (INWARD ABOUT 1-2 INCHES) BUT DID NOT SLIDE BACK. I REACHED OVER WITH MY L HAND AND OPENED THE LATCH AND WITH MY R HAND ATTEMPTED TO RECLOSE THE WINDOW. AT THE SAME TIME THE CAPT REJECTED THE TKOF. THE TKOF WAS REJECTED AT APPROX 65-70 KTS IN MY ESTIMATION. ALL PREFLT CHKS AND CHKLISTS WERE ACCOMPLISHED. THE WINDOW APPEARED SHUT AS PER ACR PROCS. IT TOOK 1-2 ROTATIONS OF THE CRANK TO RECLOSE THE WINDOW. WE WERE BOTH SATISFIED THAT THERE WAS NO SYS FAULT. CONTRIBUTING FACTORS: WHEN WE ACCOMPLISHED OUR PREFLT PANEL SCAN, MOST SWITCHES WERE IN THE WRONG POS FOR FLT AS MAINT PERSONNEL HAD OBVIOUSLY ACCOMPLISHED THEIR CHKS THE PREVIOUS NIGHT. THE COCKPIT WINDOWS BY ACR POLICY ARE NOT TO BE OPENED EXCEPT IN EMER. IT IS MY BELIEF THAT MAINT HAD OPENED AND NOT FULLY OR CORRECTLY CLOSED THE WINDOW AS IT APPEARED CLOSED BUT WAS OBVIOUSLY NOT LATCHED CORRECTLY. OUR WAKEUP AT THE OVERNIGHT HOTEL WAS XC30 BODY CLOCK TIME FOR AN XA35 DEP.

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.