A B757 was cleared to climb to FL340 in oceanic airspace. TCASII showed traffic at same altitude 13 NM ahead. Incident reported to controling agency.

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Attributes
ACN	432341
Time
Date	199903
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lppo.artcc special use airspace : 2283/285ab.warning
State Reference	FO
Altitude	msl bound lower : 33000 msl bound upper : 34000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : lppo.artcc
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other other other vortac
Flight Phase	cruise : enroute altitude change
Route In Use	enroute : other oceanic
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : lppo.artcc artcc : bird.artcc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Route In Use	enroute : other oceanic
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 17000 flight time type : 3000
ASRS Report	432341
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Events
Anomaly	conflict : airborne less severe
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : took precautionary avoidance action
Consequence	other
Miss Distance	horizontal : 78000 vertical : 0
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	Ambiguous
Air Traffic Incident	Inter Facility Coordination Failure Operational Error

Narrative:

Flight crossed 41 degrees north 20 degrees west at XX15Z at FL330. We requested and were given a climb to FL340. Some time later (I can't locate the chart, but I did report the conflict to santa maria radio giving the time and location), I noticed traffic off our right wing and ahead of us. TCASII indicated the traffic was at our altitude. As the traffic crossed in front of us TCASII read approximately 13 NM. I noted the time and 1 min 50 seconds later, we crossed the traffic's contrail. Dispatch has asked santa maria to look into the matter. There was either a communication problem or an error in determining the relative position of the aircraft. I have located the chart on which I logged the position of the event at approximately XX51Z. The report to xyx, first officer, radio was made at approximately XX56Z.

Original NASA ASRS Text

Title: A B757 WAS CLRED TO CLB TO FL340 IN OCEANIC AIRSPACE. TCASII SHOWED TFC AT SAME ALT 13 NM AHEAD. INCIDENT RPTED TO CTLING AGENCY.

Narrative: FLT CROSSED 41 DEGS N 20 DEGS W AT XX15Z AT FL330. WE REQUESTED AND WERE GIVEN A CLB TO FL340. SOME TIME LATER (I CAN'T LOCATE THE CHART, BUT I DID RPT THE CONFLICT TO SANTA MARIA RADIO GIVING THE TIME AND LOCATION), I NOTICED TFC OFF OUR R WING AND AHEAD OF US. TCASII INDICATED THE TFC WAS AT OUR ALT. AS THE TFC CROSSED IN FRONT OF US TCASII READ APPROX 13 NM. I NOTED THE TIME AND 1 MIN 50 SECONDS LATER, WE CROSSED THE TFC'S CONTRAIL. DISPATCH HAS ASKED SANTA MARIA TO LOOK INTO THE MATTER. THERE WAS EITHER A COM PROB OR AN ERROR IN DETERMINING THE RELATIVE POS OF THE ACFT. I HAVE LOCATED THE CHART ON WHICH I LOGGED THE POS OF THE EVENT AT APPROX XX51Z. THE RPT TO XYX, FO, RADIO WAS MADE AT APPROX XX56Z.

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.