Air carrier crew has TCASII RA.

Attributes
ACN	448280
Time
Date	199909
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	intersection : weard
State Reference	MA
Altitude	msl bound lower : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : a90.tracon
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Route In Use	enroute other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : multi engine
ASRS Report	448280
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe other anomaly other
Independent Detector	aircraft equipment : tcas other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued advisory none taken : unable
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance
Primary Problem	Airspace Structure

Narrative:

ATC called out traffic at 12 O'clock, 5 mi, which progressed from a TA to an RA. We had a visual on a small aircraft believed to be the cause of the RA. The TCASII called for a climb for traffic. We climbed out of our assigned altitude to comply with the RA warning, advised bos, then returned to 6000 ft when the conflict was satisfied.

Original NASA ASRS Text

Title: ACR CREW HAS TCASII RA.

Narrative: ATC CALLED OUT TFC AT 12 O'CLOCK, 5 MI, WHICH PROGRESSED FROM A TA TO AN RA. WE HAD A VISUAL ON A SMALL ACFT BELIEVED TO BE THE CAUSE OF THE RA. THE TCASII CALLED FOR A CLB FOR TFC. WE CLBED OUT OF OUR ASSIGNED ALT TO COMPLY WITH THE RA WARNING, ADVISED BOS, THEN RETURNED TO 6000 FT WHEN THE CONFLICT WAS SATISFIED.

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.