Air carrier widebody transport track heading deviation on SID out of lax.

Attributes
ACN	190584
Time
Date	199110
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lax
State Reference	CA
Altitude	msl bound lower : 900 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : lax
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : initial climbout : intermediate altitude
Route In Use	departure sid : sid enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 120 flight time total : 21000 flight time type : 200
ASRS Report	190584
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 300
ASRS Report	190586
Events
Anomaly	non adherence : clearance other spatial deviation
Independent Detector	other flight crewa other other : unspecified
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared to turn to heading 235 degree at shoreline maintain 2000 ft on a loop 8 departure. At about 900 ft TCASII alarm -- traffic, traffic sounded twice, no aircraft in sight. Turned to heading 235 degree and was changed to departure control and as soon as the frequency was set controller gave heading of 160 degree climb to 13000. First officer acknowledged, read back clearance. Left turn was begun and the flight, who we were following, asked who the clearance was for and departure responded that it was for them. We stopped the turn at 210 degree and returned to the assigned heading and continued the departure. Although it is not usual to get a clearance for a turn that early, I thought that they may be turning us to clear the traffic on TCASII.

Original NASA ASRS Text

Title: ACR WDB TRACK HDG DEV ON SID OUT OF LAX.

Narrative: CLRED TO TURN TO HDG 235 DEG AT SHORELINE MAINTAIN 2000 FT ON A LOOP 8 DEP. AT ABOUT 900 FT TCASII ALARM -- TFC, TFC SOUNDED TWICE, NO ACFT IN SIGHT. TURNED TO HDG 235 DEG AND WAS CHANGED TO DEP CTL AND AS SOON AS THE FREQ WAS SET CTLR GAVE HDG OF 160 DEG CLB TO 13000. FO ACKNOWLEDGED, READ BACK CLRNC. L TURN WAS BEGUN AND THE FLT, WHO WE WERE FOLLOWING, ASKED WHO THE CLRNC WAS FOR AND DEP RESPONDED THAT IT WAS FOR THEM. WE STOPPED THE TURN AT 210 DEG AND RETURNED TO THE ASSIGNED HDG AND CONTINUED THE DEP. ALTHOUGH IT IS NOT USUAL TO GET A CLRNC FOR A TURN THAT EARLY, I THOUGHT THAT THEY MAY BE TURNING US TO CLR THE TFC ON TCASII.

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.