Flight crew followed TCASII RA and deviated from assigned altitude.

Attributes
ACN	303583
Time
Date	199505
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ogd airport : slc
State Reference	UT
Altitude	msl bound lower : 9000 msl bound upper : 9000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : slc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
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 : 10000 flight time type : 180
ASRS Report	303583
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : instrument pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 150 flight time total : 4000 flight time type : 100
ASRS Report	303632
Events
Anomaly	altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Supplementary
Air Traffic Incident	Pilot Deviation other

Narrative:

First officer (flying) responded to an RA on the TCASII to descend (no traffic was observed on TCASII nor was traffic called out by ATC prior to alert). A sink rate was established in accordance with RA (1800-2000 FPM down). The RA extinguished still showing a TA followed immediately by another RA showing the green arc at 500 FPM descent with the red arc below it. At this time we corrected our descent back to a climb. At this time the RA extinguished. We overshot our leveloff (9000 ft) so we descended back to 9000 ft. We alerted ATC of our RA and deviation. Flight continued to slc without further incident. Targets appearing then disappearing is a common problem. This is the first time I've had a target appear with an immediate RA.

Original NASA ASRS Text

Title: FLC FOLLOWED TCASII RA AND DEVIATED FROM ASSIGNED ALT.

Narrative: FO (FLYING) RESPONDED TO AN RA ON THE TCASII TO DSND (NO TFC WAS OBSERVED ON TCASII NOR WAS TFC CALLED OUT BY ATC PRIOR TO ALERT). A SINK RATE WAS ESTABLISHED IN ACCORDANCE WITH RA (1800-2000 FPM DOWN). THE RA EXTINGUISHED STILL SHOWING A TA FOLLOWED IMMEDIATELY BY ANOTHER RA SHOWING THE GREEN ARC AT 500 FPM DSCNT WITH THE RED ARC BELOW IT. AT THIS TIME WE CORRECTED OUR DSCNT BACK TO A CLB. AT THIS TIME THE RA EXTINGUISHED. WE OVERSHOT OUR LEVELOFF (9000 FT) SO WE DSNDED BACK TO 9000 FT. WE ALERTED ATC OF OUR RA AND DEV. FLT CONTINUED TO SLC WITHOUT FURTHER INCIDENT. TARGETS APPEARING THEN DISAPPEARING IS A COMMON PROB. THIS IS THE FIRST TIME I'VE HAD A TARGET APPEAR WITH AN IMMEDIATE RA.

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.