Commuter has close proximity and TCASII RA on vectors for approach.

Attributes
ACN	256932
Time
Date	199311
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bos
State Reference	MA
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : bos artcc : zoa
Operator	common carrier : air carrier
Make Model Name	Light Transport
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 270 flight time type : 4000
ASRS Report	256932
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Supplementary
Air Traffic Incident	other

Narrative:

We were being vectored off the airway to start approach to runway 33L in bos. Our route was from pvd to bos. ATC decided to keep us at 3000 ft due to the short duration of flight. At 25 mi southeast of bos airport a target shows up on TCASII at same altitude (3000 ft). RA 'climb' is issued, which my first officer adhered to. ATC later confirmed seeing the target show up also and then thanked us for the correction.

Original NASA ASRS Text

Title: COMMUTER HAS CLOSE PROX AND TCASII RA ON VECTORS FOR APCH.

Narrative: WE WERE BEING VECTORED OFF THE AIRWAY TO START APCH TO RWY 33L IN BOS. OUR RTE WAS FROM PVD TO BOS. ATC DECIDED TO KEEP US AT 3000 FT DUE TO THE SHORT DURATION OF FLT. AT 25 MI SE OF BOS ARPT A TARGET SHOWS UP ON TCASII AT SAME ALT (3000 FT). RA 'CLB' IS ISSUED, WHICH MY FO ADHERED TO. ATC LATER CONFIRMED SEEING THE TARGET SHOW UP ALSO AND THEN THANKED US FOR THE CORRECTION.

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.