<< >> NASA ASRS Report 447590, August 1999

B747 turns wide on localizer intercept and receives TCASII RA account aircraft on approach to parallel runway.

Attributes
ACN	447590
Time
Date	199908
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lax.airport
State Reference	CA
Altitude	msl single value : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 25r other
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 24r other
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : cfi pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 184 flight time total : 9800 flight time type : 2200
ASRS Report	447590
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : multi engine
Events
Anomaly	conflict : airborne less severe other anomaly other other spatial deviation
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	flight crew : took evasive action
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On approach into lax, we were assigned runway 25R. Other traffic was on approach for the north side of the airport, runway 24R. As the PF turned onto the localizer, we got a 'descend now' TCASII alert. We were already descending and the alert went away. We had come in from an 11 hour flight. We had traffic in front of us on runway 25L we were trying to slow for. And we had traffic on our left and right. All were in sight. We should have turned earlier onto the localizer to avoid swinging too wide on the intercept.

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Original NASA ASRS Text

Title: B747 TURNS WIDE ON LOC INTERCEPT AND RECEIVES TCASII RA ACCOUNT ACFT ON APCH TO PARALLEL RWY.

Narrative: ON APCH INTO LAX, WE WERE ASSIGNED RWY 25R. OTHER TFC WAS ON APCH FOR THE N SIDE OF THE ARPT, RWY 24R. AS THE PF TURNED ONTO THE LOC, WE GOT A 'DSND NOW' TCASII ALERT. WE WERE ALREADY DSNDING AND THE ALERT WENT AWAY. WE HAD COME IN FROM AN 11 HR FLT. WE HAD TFC IN FRONT OF US ON RWY 25L WE WERE TRYING TO SLOW FOR. AND WE HAD TFC ON OUR L AND R. ALL WERE IN SIGHT. WE SHOULD HAVE TURNED EARLIER ONTO THE LOC TO AVOID SWINGING TOO WIDE ON THE INTERCEPT.

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.