Reporter loss of separation between a B767 and a B747 at FL340.

Attributes
ACN	390068
Time
Date	199801
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ozn
State Reference	FO
Altitude	msl bound lower : 34000 msl bound upper : 34000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny tracon : cae
Operator	common carrier : air carrier
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute : atlantic enroute : other oceanic
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B747 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : other oceanic enroute : atlantic
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 10 controller radar : 10
ASRS Report	390068
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	other other : unspecified
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 96000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

HB767 flying 4000N/5500W 3600N/6000W was at FL340. HB747 flying 3906N/5500W 3900N/6000W was at FL330 and controller climbed flight to FL340 without seeing traffic. Controller then got up for a break, didn't say anything during briefing. I sat down and within mins the odaps controller advised me of the situation. I immediately climbed the B767 to FL350. The odaps controller would have seen it earlier but 5 data blocks were all in the same location, and due to scale limitations the o-man didn't see it. If o-pos had been split out the scale could've been increased to eliminate data block overlap.

Original NASA ASRS Text

Title: RPTR LOSS OF SEPARATION BTWN A B767 AND A B747 AT FL340.

Narrative: HB767 FLYING 4000N/5500W 3600N/6000W WAS AT FL340. HB747 FLYING 3906N/5500W 3900N/6000W WAS AT FL330 AND CTLR CLBED FLT TO FL340 WITHOUT SEEING TFC. CTLR THEN GOT UP FOR A BREAK, DIDN'T SAY ANYTHING DURING BRIEFING. I SAT DOWN AND WITHIN MINS THE ODAPS CTLR ADVISED ME OF THE SIT. I IMMEDIATELY CLBED THE B767 TO FL350. THE ODAPS CTLR WOULD HAVE SEEN IT EARLIER BUT 5 DATA BLOCKS WERE ALL IN THE SAME LOCATION, AND DUE TO SCALE LIMITATIONS THE O-MAN DIDN'T SEE IT. IF O-POS HAD BEEN SPLIT OUT THE SCALE COULD'VE BEEN INCREASED TO ELIMINATE DATA BLOCK OVERLAP.

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.