Air carrier medium large transport reversed descent in response to TCASII RA.

Attributes
ACN	197112
Time
Date	199112
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ont
State Reference	CA
Altitude	msl bound lower : 10000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ont tower : fat
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent other
Route In Use	arrival star : star
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 5000
ASRS Report	197112
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 14425
ASRS Report	197215
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

On descent into ontario, ca, airport on the ziggy 3 arrival at approximately garey intersection descending through 10000 ft with clearance to 8000 ft TCASII called 'traffic.' after a moment TCASII called 'monitor vertical speed' then 'climb'. We complied until hearing 'clear of conflict.' the TCASII screen indicated 2 aircraft during conflict. We passed both aircraft never seeing them visually.

Original NASA ASRS Text

Title: ACR MLG REVERSED DSCNT IN RESPONSE TO TCASII RA.

Narrative: ON DSCNT INTO ONTARIO, CA, ARPT ON THE ZIGGY 3 ARR AT APPROX GAREY INTXN DSNDING THROUGH 10000 FT WITH CLRNC TO 8000 FT TCASII CALLED 'TFC.' AFTER A MOMENT TCASII CALLED 'MONITOR VERT SPD' THEN 'CLB'. WE COMPLIED UNTIL HEARING 'CLR OF CONFLICT.' THE TCASII SCREEN INDICATED 2 ACFT DURING CONFLICT. WE PASSED BOTH ACFT NEVER SEEING THEM VISUALLY.

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.