Flight crew of medium large transport in climb at 17000 received TCASII RA to descend. RA cleared and flight continued climb. Controller advised traffic at 17500.

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Attributes
ACN	188900
Time
Date	199109
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : hto
State Reference	NY
Altitude	msl bound lower : 16000 msl bound upper : 17500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors enroute airway : zbw
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 8500
ASRS Report	188900
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Being vectored by ARTCC for rbv, north of V268. Had been on heading 180 degree assigned. Cleared to FL190 and turn right to heading 280, 'vectors for robbinsville'. ARTCC advised eastbound traffic at 17500 in 1 O'clock position. TCASII did not show traffic until we were about 250 degree and TCASII advised 'traffic, traffic'. Range was about 3 or 4 mi. Continuing our turn and climb (it appeared the traffic would probably pass north of us from observing TCASII screen). As we searched visually (to no avail) TCASII issued an RA to 'reduce climb'. We had been climbing at 3000 FPM (approximately). As I began to level at about 17000 ft, TCASII increase the RA to 'descend now' and commanded a 1000 FPM descent. I began to descend and as quickly as the vertical speed indicator got to 1000 down, the TCASII issued 'cleared of conflict'. We continued back to FL190, reestablished the turn to 280. ARTCC was advised of the entire occurrence. Neither pilot ever saw the traffic, although conditions were mostly VMC.

Original NASA ASRS Text

Title: FLC OF MLG IN CLB AT 17000 RECEIVED TCASII RA TO DSND. RA CLRED AND FLT CONTINUED CLB. CTLR ADVISED TFC AT 17500.

Narrative: BEING VECTORED BY ARTCC FOR RBV, N OF V268. HAD BEEN ON HDG 180 DEG ASSIGNED. CLRED TO FL190 AND TURN R TO HDG 280, 'VECTORS FOR ROBBINSVILLE'. ARTCC ADVISED EBOUND TFC AT 17500 IN 1 O'CLOCK POS. TCASII DID NOT SHOW TFC UNTIL WE WERE ABOUT 250 DEG AND TCASII ADVISED 'TFC, TFC'. RANGE WAS ABOUT 3 OR 4 MI. CONTINUING OUR TURN AND CLB (IT APPEARED THE TFC WOULD PROBABLY PASS N OF US FROM OBSERVING TCASII SCREEN). AS WE SEARCHED VISUALLY (TO NO AVAIL) TCASII ISSUED AN RA TO 'REDUCE CLB'. WE HAD BEEN CLBING AT 3000 FPM (APPROX). AS I BEGAN TO LEVEL AT ABOUT 17000 FT, TCASII INCREASE THE RA TO 'DSND NOW' AND COMMANDED A 1000 FPM DSCNT. I BEGAN TO DSND AND AS QUICKLY AS THE VERT SPD INDICATOR GOT TO 1000 DOWN, THE TCASII ISSUED 'CLRED OF CONFLICT'. WE CONTINUED BACK TO FL190, REESTABLISHED THE TURN TO 280. ARTCC WAS ADVISED OF THE ENTIRE OCCURRENCE. NEITHER PLT EVER SAW THE TFC, ALTHOUGH CONDITIONS WERE MOSTLY VMC.

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.