Large transport receives TCASII RA, responds with climb.

Attributes
ACN	273813
Time
Date	199406
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bos
State Reference	MA
Altitude	msl bound lower : 7500 msl bound upper : 8500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute airway : bos
Flight Plan	VFR
Aircraft 2
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 20000 flight time type : 16000
ASRS Report	273813
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : commercial
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

ATC, bos approach, advised of light aircraft traffic 12 O'clock 7500 ft and offered us descent. We declined. We were given a slowdown from 250-210 KTS and a frequency change. Shortly thereafter we got a TCASII TA. Followed by a TCASII RA to 'climb.' starting the climb we noticed 200 ft separation from traffic on TCASII. We climbed to 8500 ft. Later conversation with bos TRACON revealed other traffic to be a cessna 172 but couldn't get numbers. Boston did not seem to be concerned by the 'near miss' and in fact wondered of our concern.

Original NASA ASRS Text

Title: LGT RECEIVES TCASII RA, RESPONDS WITH CLB.

Narrative: ATC, BOS APCH, ADVISED OF LIGHT ACFT TFC 12 O'CLOCK 7500 FT AND OFFERED US DSCNT. WE DECLINED. WE WERE GIVEN A SLOWDOWN FROM 250-210 KTS AND A FREQ CHANGE. SHORTLY THEREAFTER WE GOT A TCASII TA. FOLLOWED BY A TCASII RA TO 'CLB.' STARTING THE CLB WE NOTICED 200 FT SEPARATION FROM TFC ON TCASII. WE CLBED TO 8500 FT. LATER CONVERSATION WITH BOS TRACON REVEALED OTHER TFC TO BE A CESSNA 172 BUT COULDN'T GET NUMBERS. BOSTON DID NOT SEEM TO BE CONCERNED BY THE 'NEAR MISS' AND IN FACT WONDERED OF OUR CONCERN.

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.