Takeoff aborted as flight crew was aware of captain's sliding window not being fully closed.

Attributes
ACN	149668
Time
Date	199006
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bos
State Reference	MA
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	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : takeoff other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 60 flight time total : 19000 flight time type : 60
ASRS Report	149668
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 9000 flight time type : 200
ASRS Report	149556
Events
Anomaly	aircraft equipment problem : less severe 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	Pilot Deviation

Narrative:

As takeoff roll was started from boston logan airport runway 22R and aircraft started to pressurize, a loud noise of air escaping was heard from the left cockpit window. Takeoff was aborted. Speed was 60-70 KTS. After stopping, it was observed that yellow index marks indicating window is shut and locked were aligned but rear edge of window was open about 1/4'. Opened and closed window and taxied back for normal takeoff.

Original NASA ASRS Text

Title: TKOF ABORTED AS FLT CREW WAS AWARE OF CAPT'S SLIDING WINDOW NOT BEING FULLY CLOSED.

Narrative: AS TKOF ROLL WAS STARTED FROM BOSTON LOGAN ARPT RWY 22R AND ACFT STARTED TO PRESSURIZE, A LOUD NOISE OF AIR ESCAPING WAS HEARD FROM THE L COCKPIT WINDOW. TKOF WAS ABORTED. SPD WAS 60-70 KTS. AFTER STOPPING, IT WAS OBSERVED THAT YELLOW INDEX MARKS INDICATING WINDOW IS SHUT AND LOCKED WERE ALIGNED BUT REAR EDGE OF WINDOW WAS OPEN ABOUT 1/4'. OPENED AND CLOSED WINDOW AND TAXIED BACK FOR NORMAL TKOF.

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.