Altitude deviation caused by reaction to TCAS ii.

Attributes
ACN	163411
Time
Date	199011
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : psp airport : ont
State Reference	CA
Altitude	msl bound lower : 14000 msl bound upper : 16000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla
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 enroute airway : zla
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 80 flight time total : 12000 flight time type : 850
ASRS Report	163411
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 7000 flight time type : 300
ASRS Report	163390
Events
Anomaly	altitude deviation : crossing restriction not met non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

In our descent at approximately 16000' we experienced a TCAS ii alert to climb to avoid traffic. We climbed about 1000' and then returned to our descent. We were not able to make an altitude restriction at bands intersection. We never saw the traffic, but the controller comfirmed it was a VFR small transport. The system (TCAS ii) seems to work well but we need to become more familiar with TCAS so that we an advise ATC of our intentions as the situation develops.

Original NASA ASRS Text

Title: ALT DEVIATION CAUSED BY REACTION TO TCAS II.

Narrative: IN OUR DSNT AT APPROX 16000' WE EXPERIENCED A TCAS II ALERT TO CLB TO AVOID TFC. WE CLBED ABOUT 1000' AND THEN RETURNED TO OUR DSNT. WE WERE NOT ABLE TO MAKE AN ALT RESTRICTION AT BANDS INTXN. WE NEVER SAW THE TFC, BUT THE CTLR COMFIRMED IT WAS A VFR SMT. THE SYS (TCAS II) SEEMS TO WORK WELL BUT WE NEED TO BECOME MORE FAMILIAR WITH TCAS SO THAT WE AN ADVISE ATC OF OUR INTENTIONS AS THE SITUATION DEVELOPS.

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.