TCASII RA induces flight crew deviation. Altitude deviation altitude excursion.

Attributes
ACN	221695
Time
Date	199209
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : rka
State Reference	NY
Altitude	msl bound lower : 23000 msl bound upper : 24000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 6000
ASRS Report	221695
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 15000
ASRS Report	221694
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	vertical : 1000
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation other

Narrative:

During IMC cruise at FL230 we got a TCASII TA. Radar was on because of frontal activity at the 80 mi range. Soon after we got a 'climb, climb' RA. We climbed 1000 ft before it reduced to a 'monitor climb.' we immediately advised ATC. As soon as the RA cleared we returned to our assigned altitude. From what ATC said and the other aircraft confirmed his high rate of climb below us triggered the alert. As far as we can tell all normal in-flight clrncs were maintained.

Original NASA ASRS Text

Title: TCASII RA INDUCES FLC DEV. ALTDEV ALT EXCURSION.

Narrative: DURING IMC CRUISE AT FL230 WE GOT A TCASII TA. RADAR WAS ON BECAUSE OF FRONTAL ACTIVITY AT THE 80 MI RANGE. SOON AFTER WE GOT A 'CLB, CLB' RA. WE CLBED 1000 FT BEFORE IT REDUCED TO A 'MONITOR CLB.' WE IMMEDIATELY ADVISED ATC. AS SOON AS THE RA CLRED WE RETURNED TO OUR ASSIGNED ALT. FROM WHAT ATC SAID AND THE OTHER ACFT CONFIRMED HIS HIGH RATE OF CLB BELOW US TRIGGERED THE ALERT. AS FAR AS WE CAN TELL ALL NORMAL INFLT CLRNCS WERE MAINTAINED.

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.