B767-300ER flight has cockpit sliding window open during takeoff roll, returns to gate for maintenan...

Attributes
ACN	508000
Time
Date	200104
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp pilot : cfi
Experience	flight time last 90 days : 180 flight time total : 19000 flight time type : 900
ASRS Report	508000
Events
Anomaly	aircraft equipment problem : less severe maintenance problem : improper maintenance non adherence : company policies
Resolutory Action	flight crew : overcame equipment problem flight crew : rejected takeoff
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

First officer's cockpit side window spontaneously opened at beginning off takeoff roll. Discontinued takeoff and cleared runway. Closed window and it spontaneously opened again during taxi. Returned to gate area and entered discrepancy in aircraft logbook. Maintenance examined window and determined it to be acceptable for flight. Continued flight without further incident. At first glance, this may appear to have been a failure to check this window for security during preflight preparations. However, we checked this window's visual indicator as well as the security of the locking handle during the before start checklist, as we knew this aircraft was returning from the maintenance hangar and we discussed the likelihood that the cockpit windows had been opened during maintenance. This leads me to believe that it may be impossible to determine the security of these windows from the cockpit.

Original NASA ASRS Text

Title: B767-300ER FLT HAS COCKPIT SLIDING WINDOW OPEN DURING TKOF ROLL, RETURNS TO GATE FOR MAINT.

Narrative: FO'S COCKPIT SIDE WINDOW SPONTANEOUSLY OPENED AT BEGINNING OFF TKOF ROLL. DISCONTINUED TKOF AND CLRED RWY. CLOSED WINDOW AND IT SPONTANEOUSLY OPENED AGAIN DURING TAXI. RETURNED TO GATE AREA AND ENTERED DISCREPANCY IN ACFT LOGBOOK. MAINT EXAMINED WINDOW AND DETERMINED IT TO BE ACCEPTABLE FOR FLT. CONTINUED FLT WITHOUT FURTHER INCIDENT. AT FIRST GLANCE, THIS MAY APPEAR TO HAVE BEEN A FAILURE TO CHK THIS WINDOW FOR SECURITY DURING PREFLT PREPARATIONS. HOWEVER, WE CHKED THIS WINDOW'S VISUAL INDICATOR AS WELL AS THE SECURITY OF THE LOCKING HANDLE DURING THE BEFORE START CHKLIST, AS WE KNEW THIS ACFT WAS RETURNING FROM THE MAINT HANGAR AND WE DISCUSSED THE LIKELIHOOD THAT THE COCKPIT WINDOWS HAD BEEN OPENED DURING MAINT. THIS LEADS ME TO BELIEVE THAT IT MAY BE IMPOSSIBLE TO DETERMINE THE SECURITY OF THESE WINDOWS FROM THE COCKPIT.

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.

B767-300ER flight has cockpit sliding window open during takeoff roll, returns to gate for maintenance.