Air carrier SF34 on vector and given climb by departure controller. SF34 given a climb and turn by departure controller, and at the same time saw an aircraft descending at his 11 O'clock position. SF34 got TCASII to descend and did that rather than climb as cleared. Then the TCASII told him to 'climb, climb now.' as a result less than standard separation occurred.

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Attributes
ACN	322358
Time
Date	199512
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bos
State Reference	MA
Altitude	msl bound lower : 4000 msl bound upper : 6000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : bos
Operator	common carrier : air carrier
Make Model Name	SF 340A
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	descent other
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 230 flight time total : 10000 flight time type : 3000
ASRS Report	322358
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 5000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Pilot Deviation Operational Error

Narrative:

Departing boston level at 4000 ft heading 300 degrees. Received clearance to climb to 6000 ft and turn right to 090 degrees. At same time TCASII reported traffic at 11 O'clock, 3 mi descending through 4500 ft. About 3 seconds later TCASII issued a 'descent.' we kept our turn toward 090 degrees and began a descent. About 3 seconds later we saw the traffic at about 9 O'clock at same altitude still in a descent, at same time we were issued 'increase descent,' and about 3-5 seconds after that we were issued 'climb, climb now.' 1) ATC did not issue a clearance away from traffic until traffic was about 11 O'clock 3 mi and 500 ft above our altitude. 2) ATC did not issue a TA at any time. 3) ATC did not acknowledge any traffic conflict except 'clear of traffic' after we advised that we were responding to an 'RA.'

Original NASA ASRS Text

Title: ACR SF34 ON VECTOR AND GIVEN CLB BY DEP CTLR. SF34 GIVEN A CLB AND TURN BY DEP CTLR, AND AT THE SAME TIME SAW AN ACFT DSNDING AT HIS 11 O'CLOCK POS. SF34 GOT TCASII TO DSND AND DID THAT RATHER THAN CLB AS CLRED. THEN THE TCASII TOLD HIM TO 'CLB, CLB NOW.' AS A RESULT LTSS OCCURRED.

Narrative: DEPARTING BOSTON LEVEL AT 4000 FT HDG 300 DEGS. RECEIVED CLRNC TO CLB TO 6000 FT AND TURN R TO 090 DEGS. AT SAME TIME TCASII RPTED TFC AT 11 O'CLOCK, 3 MI DSNDING THROUGH 4500 FT. ABOUT 3 SECONDS LATER TCASII ISSUED A 'DSCNT.' WE KEPT OUR TURN TOWARD 090 DEGS AND BEGAN A DSCNT. ABOUT 3 SECONDS LATER WE SAW THE TFC AT ABOUT 9 O'CLOCK AT SAME ALT STILL IN A DSCNT, AT SAME TIME WE WERE ISSUED 'INCREASE DSCNT,' AND ABOUT 3-5 SECONDS AFTER THAT WE WERE ISSUED 'CLB, CLB NOW.' 1) ATC DID NOT ISSUE A CLRNC AWAY FROM TFC UNTIL TFC WAS ABOUT 11 O'CLOCK 3 MI AND 500 FT ABOVE OUR ALT. 2) ATC DID NOT ISSUE A TA AT ANY TIME. 3) ATC DID NOT ACKNOWLEDGE ANY TFC CONFLICT EXCEPT 'CLR OF TFC' AFTER WE ADVISED THAT WE WERE RESPONDING TO AN 'RA.'

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.