Air carrier medium large transport misses radio call due TCASII volume while in descent to lax.

Attributes
ACN	209055
Time
Date	199204
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lax
State Reference	CA
Altitude	msl bound lower : 8000 msl bound upper : 8000
Environment
Flight Conditions	Mixed
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : lax tower : mfe
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent 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 : 240 flight time total : 10000 flight time type : 10000
ASRS Report	209055
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During approach to lax, first officer was off ATC making a required PA and TCASII was talking, I missed an important call on a busy frequency. TCASII call was made on an aircraft previously sighted and was unnecessary. TCASII needs a way to prevent a call on an aircraft already in sight.

Original NASA ASRS Text

Title: ACR MLG MISSES RADIO CALL DUE TCASII VOLUME WHILE IN DSCNT TO LAX.

Narrative: DURING APCH TO LAX, FO WAS OFF ATC MAKING A REQUIRED PA AND TCASII WAS TALKING, I MISSED AN IMPORTANT CALL ON A BUSY FREQ. TCASII CALL WAS MADE ON AN ACFT PREVIOUSLY SIGHTED AND WAS UNNECESSARY. TCASII NEEDS A WAY TO PREVENT A CALL ON AN ACFT ALREADY IN SIGHT.

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.