TCASII RA dictated climb to avoid traffic.

Attributes
ACN	187085
Time
Date	199108
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bdl
State Reference	CT
Altitude	msl bound lower : 3000 msl bound upper : 3700
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : bdl
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	arrival other enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : commercial
Experience	flight time last 90 days : 60 flight time total : 5000 flight time type : 400
ASRS Report	187085
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : atp pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 100 flight time total : 10000 flight time type : 1000
ASRS Report	187228
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : far other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 750 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Altitude deviation because of TCASII RA. While on approach to runway 24 at bradley (bdl), we received an RA and aural alert 'climb, climb, climb'. Our vertical speed indicator showed a restr red arc from 6000 FPM down to 1800 FPM up and a green flag to indicate between 1700 FPM to 2000 FPM up. We followed the climb directive and leveled off at 3700 ft. Approach control was notified. We were on a left base, just about to turn an approximately 6-7 mi final. Approach control had notified us of traffic at 12 O'clock 2000 ft about 3 or 4 mi earlier. At the time we were IFR assigned 3000. We were also tracking 4 or 5 aircraft on our vertical speed indicator/radar within 5 mi of our position. Approach told me that the traffic appeared to climb from 2000 to 2500 ft, then level off. Our indication was that the traffic was 500 ft directly below our flight path. WX was marginal VFR due to haze, about 2 mi in-flight visibility. Landed without incident. I talked to the approach control supervisor and he did say that there would be an altitude deviation filed on me classified under TCASII deviation.

Original NASA ASRS Text

Title: TCASII RA DICTATED CLB TO AVOID TFC.

Narrative: ALT DEV BECAUSE OF TCASII RA. WHILE ON APCH TO RWY 24 AT BRADLEY (BDL), WE RECEIVED AN RA AND AURAL ALERT 'CLB, CLB, CLB'. OUR VERT SPD INDICATOR SHOWED A RESTR RED ARC FROM 6000 FPM DOWN TO 1800 FPM UP AND A GREEN FLAG TO INDICATE BTWN 1700 FPM TO 2000 FPM UP. WE FOLLOWED THE CLB DIRECTIVE AND LEVELED OFF AT 3700 FT. APCH CTL WAS NOTIFIED. WE WERE ON A L BASE, JUST ABOUT TO TURN AN APPROX 6-7 MI FINAL. APCH CTL HAD NOTIFIED US OF TFC AT 12 O'CLOCK 2000 FT ABOUT 3 OR 4 MI EARLIER. AT THE TIME WE WERE IFR ASSIGNED 3000. WE WERE ALSO TRACKING 4 OR 5 ACFT ON OUR VERT SPD INDICATOR/RADAR WITHIN 5 MI OF OUR POS. APCH TOLD ME THAT THE TFC APPEARED TO CLB FROM 2000 TO 2500 FT, THEN LEVEL OFF. OUR INDICATION WAS THAT THE TFC WAS 500 FT DIRECTLY BELOW OUR FLT PATH. WX WAS MARGINAL VFR DUE TO HAZE, ABOUT 2 MI INFLT VISIBILITY. LANDED WITHOUT INCIDENT. I TALKED TO THE APCH CTL SUPVR AND HE DID SAY THAT THERE WOULD BE AN ALT DEV FILED ON ME CLASSIFIED UNDER TCASII DEV.

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.