Commuter mdt altitude deviation excursion from clearance altitude in response to TCASII RA.

Attributes
ACN	193441
Time
Date	199104
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : hpn
State Reference	NY
Altitude	msl bound lower : 3000 msl bound upper : 3400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	Medium Transport, High Wing, 2 Turboprop Eng
Flight Phase	cruise other descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument pilot : atp
Experience	flight time last 90 days : 250 flight time total : 8000 flight time type : 1100
ASRS Report	193441
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	Other
Miss Distance	horizontal : 3000 vertical : 400
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

First TCASII RA: we were level at 3000 ATC called traffic. We saw a small small aircraft and continued at 3000. As we got closer TCASII gave us a climb call with the green arc at 2500 FPM. We started a climb at about 3400 ft we were clear of traffic and we returned to 3000 ft. Second TCASII RA: about 9 mins later we were on a wide right downwind for 34 at hpn and we got a similar TCASII alert. We climbed to about 3400 then returned to 3000. We notified ATC nothing more was said.

Original NASA ASRS Text

Title: COMMUTER MDT ALTDEV EXCURSION FROM CLRNC ALT IN RESPONSE TO TCASII RA.

Narrative: FIRST TCASII RA: WE WERE LEVEL AT 3000 ATC CALLED TFC. WE SAW A SMALL SMA AND CONTINUED AT 3000. AS WE GOT CLOSER TCASII GAVE US A CLB CALL WITH THE GREEN ARC AT 2500 FPM. WE STARTED A CLB AT ABOUT 3400 FT WE WERE CLR OF TFC AND WE RETURNED TO 3000 FT. SECOND TCASII RA: ABOUT 9 MINS LATER WE WERE ON A WIDE R DOWNWIND FOR 34 AT HPN AND WE GOT A SIMILAR TCASII ALERT. WE CLBED TO ABOUT 3400 THEN RETURNED TO 3000. WE NOTIFIED ATC NOTHING MORE WAS SAID.

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.