On initial climb, medium large transport has TCASII TA. Heading deviation.

Attributes
ACN	256724
Time
Date	199311
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : bos
State Reference	MA
Altitude	msl bound lower : 1500 msl bound upper : 2500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : bos
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : initial
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial
Experience	flight time last 90 days : 180 flight time total : 9800 flight time type : 7500
ASRS Report	256724
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 700
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

Takeoff 22R at bos. Turned left to 140 degrees heading. Captain told to call departure control on 133.0 at about 2000-1500 ft departure gave a 090 degree heading. I was beginning to rollout on 090 degrees looking at my HSI to roll out. I heard 'traffic, traffic' and immediately looked out. I saw bright white lights at 12 O'clock slightly low, and at 11 O'clock slightly high. I turned 15 degrees left and lowered the nose to 5 degrees nose up to split the 2 sets of lights. Captain said zoom up. I did and turned back to about 090 degrees. Captain queried the controller about traffic. Controller said turn to 100 degrees. The white light low was a buoy, the lights high and left was an airplane. My evasive action (away from 090 degrees) and back (when captain said 'zoom') took about 10 seconds total. I think the original 090 degree heading given to us by departure control was made prematurely. We paralleled the inbounds on ILS runway 27 to bos. That was the conflicting traffic. There was also a wind from the south.

Original NASA ASRS Text

Title: ON INITIAL CLB, MLG HAS TCASII TA. HDG DEV.

Narrative: TKOF 22R AT BOS. TURNED L TO 140 DEGS HDG. CAPT TOLD TO CALL DEP CTL ON 133.0 AT ABOUT 2000-1500 FT DEP GAVE A 090 DEG HDG. I WAS BEGINNING TO ROLLOUT ON 090 DEGS LOOKING AT MY HSI TO ROLL OUT. I HEARD 'TFC, TFC' AND IMMEDIATELY LOOKED OUT. I SAW BRIGHT WHITE LIGHTS AT 12 O'CLOCK SLIGHTLY LOW, AND AT 11 O'CLOCK SLIGHTLY HIGH. I TURNED 15 DEGS L AND LOWERED THE NOSE TO 5 DEGS NOSE UP TO SPLIT THE 2 SETS OF LIGHTS. CAPT SAID ZOOM UP. I DID AND TURNED BACK TO ABOUT 090 DEGS. CAPT QUERIED THE CTLR ABOUT TFC. CTLR SAID TURN TO 100 DEGS. THE WHITE LIGHT LOW WAS A BUOY, THE LIGHTS HIGH AND LEFT WAS AN AIRPLANE. MY EVASIVE ACTION (AWAY FROM 090 DEGS) AND BACK (WHEN CAPT SAID 'ZOOM') TOOK ABOUT 10 SECONDS TOTAL. I THINK THE ORIGINAL 090 DEG HDG GIVEN TO US BY DEP CTL WAS MADE PREMATURELY. WE PARALLELED THE INBOUNDS ON ILS RWY 27 TO BOS. THAT WAS THE CONFLICTING TFC. THERE WAS ALSO A WIND FROM THE S.

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.