Air carrier on takeoff received TA during initial climb.

Attributes
ACN	544298
Time
Date	200204
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : tist.airport
State Reference	VI
Altitude	msl bound lower : 600 msl bound upper : 1700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : sdf.tower
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff climbout : intermediate altitude climbout : initial
Route In Use	departure : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : tist.tower
Operator	common carrier : air taxi
Make Model Name	Twin Otter DHC-6
Operating Under FAR Part	Part 135
Flight Phase	cruise : level
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne critical non adherence : far non adherence : required legal separation
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : insufficient time
Consequence	faa : reviewed incident with flight crew other
Miss Distance	horizontal : 5000 vertical : 0
Supplementary
Problem Areas	FAA Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Location: st thomas airport, 1 mi off departure end of runway we were #1 for takeoff on runway 10 at st thomas and were given traffic information as twin otter at 1 O'clock position over the bay. 'Runway 10, cleared for takeoff except change heading to 120 degrees.' sequence of events were positive rate gear up. And at 400 ft heading select 120 degrees. At 600 ft we received a TA. We looked out to see the otter at approximately 600 ft directly in our flight path as we passed over him at 1700 ft. In the event we had lost an engine on takeoff, we would have run right into each other.

Original NASA ASRS Text

Title: ACR ON TKOF RECEIVED TA DURING INITIAL CLB.

Narrative: LOCATION: ST THOMAS ARPT, 1 MI OFF DEP END OF RWY WE WERE #1 FOR TKOF ON RWY 10 AT ST THOMAS AND WERE GIVEN TFC INFO AS TWIN OTTER AT 1 O'CLOCK POS OVER THE BAY. 'RWY 10, CLRED FOR TKOF EXCEPT CHANGE HEADING TO 120 DEGS.' SEQUENCE OF EVENTS WERE POSITIVE RATE GEAR UP. AND AT 400 FT HEADING SELECT 120 DEGS. AT 600 FT WE RECEIVED A TA. WE LOOKED OUT TO SEE THE OTTER AT APPROX 600 FT DIRECTLY IN OUR FLT PATH AS WE PASSED OVER HIM AT 1700 FT. IN THE EVENT WE HAD LOST AN ENG ON TKOF, WE WOULD HAVE RUN RIGHT INTO EACH OTHER.

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.