Narrative:

On rotation, the exhaust cowl on the left engine opened and bent over the leading edge of the wing. There was structural damage to the wing and engine. The captain was the PF. TOGW was approximately 347000 pounds. Climbing through 1000 ft the captain said the airplane felt bent. Shortly thereafter the purser called and spoke of the problem with the engine. The first officer went back to verify and found a deadheading B767 captain on board and told him to take a look and come to the cockpit. After discussing the problem, we decided to declare an emergency, dump fuel, try to get flaps out and land overweight on runway 31L at jfk. The captain spoke to dispatch (line maintenance) and chief purser and the passenger. We had the deadheading captain situation by the left engine to analyze the situation when we went to flaps 1 degree. At that time we lost part of the exhaust cowl and received a leading edge flap asymmetry message on EICAS. We worked the checklist and were able to get the trailing edge flaps to 20 degrees. We landed approximately 10000-15000 pounds overweight. Brake temperatures were 9 degrees. Maintenance and fire department advised to shut down left engine. They inspected brakes and said a slow taxi to the gate would be ok.

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Original NASA ASRS Text

Title: B767-300 CREW HAD THE #1 ENG EXHAUST COWL COME OPEN ON ROTATION AT JFK. COWL IMPACTED THE WING LEADING EDGE FLAPS. MAJOR DAMAGE RESULTED.

Narrative: ON ROTATION, THE EXHAUST COWL ON THE L ENG OPENED AND BENT OVER THE LEADING EDGE OF THE WING. THERE WAS STRUCTURAL DAMAGE TO THE WING AND ENG. THE CAPT WAS THE PF. TOGW WAS APPROX 347000 LBS. CLBING THROUGH 1000 FT THE CAPT SAID THE AIRPLANE FELT BENT. SHORTLY THEREAFTER THE PURSER CALLED AND SPOKE OF THE PROB WITH THE ENG. THE FO WENT BACK TO VERIFY AND FOUND A DEADHEADING B767 CAPT ON BOARD AND TOLD HIM TO TAKE A LOOK AND COME TO THE COCKPIT. AFTER DISCUSSING THE PROB, WE DECIDED TO DECLARE AN EMER, DUMP FUEL, TRY TO GET FLAPS OUT AND LAND OVERWT ON RWY 31L AT JFK. THE CAPT SPOKE TO DISPATCH (LINE MAINT) AND CHIEF PURSER AND THE PAX. WE HAD THE DEADHEADING CAPT SIT BY THE L ENG TO ANALYZE THE SIT WHEN WE WENT TO FLAPS 1 DEG. AT THAT TIME WE LOST PART OF THE EXHAUST COWL AND RECEIVED A LEADING EDGE FLAP ASYMMETRY MESSAGE ON EICAS. WE WORKED THE CHKLIST AND WERE ABLE TO GET THE TRAILING EDGE FLAPS TO 20 DEGS. WE LANDED APPROX 10000-15000 LBS OVERWT. BRAKE TEMPS WERE 9 DEGS. MAINT AND FIRE DEPT ADVISED TO SHUT DOWN L ENG. THEY INSPECTED BRAKES AND SAID A SLOW TAXI TO THE GATE WOULD BE OK.

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.