Narrative:

Takeoff clearance was received before reaching the runway; the before takeoff checklist was completed and the line-up checks completed on the runway. At approximately 40 KTS I called 'abort; abort' (simulated takeoff abort); the inspector responded appropriately by applying the brakes and reverse thrust. I immediately advised him to relax and continue the takeoff roll. I trimmed the power levers and called for rotation at about 95 KIAS; I called positive rate and the inspector called 'gear up.' I recall I was scanning the instruments; checked that torques and temperatures were within limits; and confirmed the gear was retracting; when I heard the word 'airplane;' which I thought was unusual. I immediately looked out in front and saw a low wing aircraft directly ahead; at our altitude; and closing fast. The aircraft did not alter course; so I immediately took the controls and performed an aggressive hard left bank. I called 'my aircraft' and rolled wings level after approximately 60 degrees of turn at which time I queried the tower. Tower immediately queried 2 aircraft; one of which was on a right base to runway 33 and should not have been a factor. At that time we were handed off to departure. I gave the aircraft controls back to the inspector and completed the after takeoff checklist. I decided to continue the flight. I believe that we likely came within about 200-300 ft horizontally of this aircraft at an altitude of about 100 ft AGL.

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Original NASA ASRS Text

Title: BE90 HAS NMAC WITH UNKNOWN ACFT SHORTLY AFTER TKOF.

Narrative: TKOF CLRNC WAS RECEIVED BEFORE REACHING THE RWY; THE BEFORE TKOF CHKLIST WAS COMPLETED AND THE LINE-UP CHKS COMPLETED ON THE RWY. AT APPROX 40 KTS I CALLED 'ABORT; ABORT' (SIMULATED TKOF ABORT); THE INSPECTOR RESPONDED APPROPRIATELY BY APPLYING THE BRAKES AND REVERSE THRUST. I IMMEDIATELY ADVISED HIM TO RELAX AND CONTINUE THE TKOF ROLL. I TRIMMED THE PWR LEVERS AND CALLED FOR ROTATION AT ABOUT 95 KIAS; I CALLED POSITIVE RATE AND THE INSPECTOR CALLED 'GEAR UP.' I RECALL I WAS SCANNING THE INSTS; CHKED THAT TORQUES AND TEMPS WERE WITHIN LIMITS; AND CONFIRMED THE GEAR WAS RETRACTING; WHEN I HEARD THE WORD 'AIRPLANE;' WHICH I THOUGHT WAS UNUSUAL. I IMMEDIATELY LOOKED OUT IN FRONT AND SAW A LOW WING ACFT DIRECTLY AHEAD; AT OUR ALT; AND CLOSING FAST. THE ACFT DID NOT ALTER COURSE; SO I IMMEDIATELY TOOK THE CTLS AND PERFORMED AN AGGRESSIVE HARD L BANK. I CALLED 'MY ACFT' AND ROLLED WINGS LEVEL AFTER APPROX 60 DEGS OF TURN AT WHICH TIME I QUERIED THE TWR. TWR IMMEDIATELY QUERIED 2 ACFT; ONE OF WHICH WAS ON A R BASE TO RWY 33 AND SHOULD NOT HAVE BEEN A FACTOR. AT THAT TIME WE WERE HANDED OFF TO DEP. I GAVE THE ACFT CTLS BACK TO THE INSPECTOR AND COMPLETED THE AFTER TKOF CHKLIST. I DECIDED TO CONTINUE THE FLT. I BELIEVE THAT WE LIKELY CAME WITHIN ABOUT 200-300 FT HORIZLY OF THIS ACFT AT AN ALT OF ABOUT 100 FT AGL.

Data retrieved from NASA's ASRS site as of January 2009 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.