Medium large transport has TCASII RA on climb out. Responds with descent.

Attributes
ACN	221046
Time
Date	199209
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : ont
State Reference	CA
Altitude	msl bound lower : 6000 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ont
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
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 : 8800 flight time type : 4000
ASRS Report	221046
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

TCASII RA descend commanded. We followed since we had no visual. Approach did call out the traffic, a twin engine small transport. We informed departure of our descent. We descended to 6000 ft (approximately) before 'clear of conflict' TCASII call.

Original NASA ASRS Text

Title: MLG HAS TCASII RA ON CLBOUT. RESPONDS WITH DSCNT.

Narrative: TCASII RA DSND COMMANDED. WE FOLLOWED SINCE WE HAD NO VISUAL. APCH DID CALL OUT THE TFC, A TWIN ENG SMT. WE INFORMED DEP OF OUR DSCNT. WE DSNDED TO 6000 FT (APPROX) BEFORE 'CLR OF CONFLICT' TCASII CALL.

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.