Commuter light transport made a takeoff with the left engine cowl unlatched.

Attributes
ACN	148898
Time
Date	199006
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : btv
State Reference	VT
Altitude	agl bound lower : 0 agl bound upper : 1000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : atp
Experience	flight time last 90 days : 150 flight time total : 8500
ASRS Report	148898
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : instrument pilot : atp
Experience	flight time last 90 days : 115 flight time total : 2700
ASRS Report	148995
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : unable other
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Upon a change of crew in btv my first officer performed an acceptance inspection of aircraft and reported to me it was ok and complete. We carried out our routine and normal procedures and upon lift off our F/a informed us of an open left engine cowling. I returned to btv immediately...total flight time was 11 min. No injuries but damage to left engine cowling. Supplemental information from acn 148995. Probably I hadn't secured it properly after checking the oil level on preflight, (which is required by company).

Original NASA ASRS Text

Title: COMMUTER LTT MADE A TKOF WITH THE LEFT ENGINE COWL UNLATCHED.

Narrative: UPON A CHANGE OF CREW IN BTV MY F/O PERFORMED AN ACCEPTANCE INSPECTION OF ACFT AND RPTED TO ME IT WAS OK AND COMPLETE. WE CARRIED OUT OUR ROUTINE AND NORMAL PROCS AND UPON LIFT OFF OUR F/A INFORMED US OF AN OPEN L ENG COWLING. I RETURNED TO BTV IMMEDIATELY...TOTAL FLT TIME WAS 11 MIN. NO INJURIES BUT DAMAGE TO L ENG COWLING. SUPPLEMENTAL INFO FROM ACN 148995. PROBABLY I HADN'T SECURED IT PROPERLY AFTER CHKING THE OIL LEVEL ON PREFLT, (WHICH IS REQUIRED BY COMPANY).

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.