Aircraft passed under traffic he was following after departure.

Attributes
ACN	108340
Time
Date	198904
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : lax
State Reference	CA
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : lax
Operator	common carrier : air carrier
Make Model Name	Widebody Transport
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : sid
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	108340
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 800
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

ATC asked if we had traffic at 12 O'clock. I confirmed that I had traffic at that position. ATC cleared us to climb VFR and stay below that traffic. As we climbed, we spotted the widebody transport at 2 O'clock. We leveled off to pass approximately 800-1000' below the widebody transport. ATC gave improper position of the traffic and I misidented the traffic. The traffic I saw at 12 O'clock was not close enough to see the air carrier.

Original NASA ASRS Text

Title: ACFT PASSED UNDER TRAFFIC HE WAS FOLLOWING AFTER DEP.

Narrative: ATC ASKED IF WE HAD TFC AT 12 O'CLOCK. I CONFIRMED THAT I HAD TFC AT THAT POS. ATC CLRED US TO CLB VFR AND STAY BELOW THAT TFC. AS WE CLBED, WE SPOTTED THE WDB AT 2 O'CLOCK. WE LEVELED OFF TO PASS APPROX 800-1000' BELOW THE WDB. ATC GAVE IMPROPER POS OF THE TFC AND I MISIDENTED THE TFC. THE TFC I SAW AT 12 O'CLOCK WAS NOT CLOSE ENOUGH TO SEE THE ACR.

Data retrieved from NASA's ASRS site as of August 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.