Gfk controller describes possible loss of separation during intersecting runway operations.

Attributes
ACN	661266
Time
Date	200505
Place
Locale Reference	airport : gfk.airport
State Reference	ND
Altitude	agl bound lower : 0 agl bound upper : 500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : gfk.tower
Operator	general aviation : instructional
Make Model Name	PA-44 Seminole Turbo Seminole
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff ground : takeoff roll
Flight Plan	VFR
Aircraft 2
Controlling Facilities	tower : gfk.tower
Operator	general aviation : instructional
Make Model Name	Decathlon
Operating Under FAR Part	Part 91
Flight Phase	landing other
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : radar
Experience	controller limited radar : 4
ASRS Report	661266
Person 2
Affiliation	other
Function	flight crew : single pilot
Events
Anomaly	conflict : airborne critical incursion : runway non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

Runways 35L and 26 intersect. Closed pattern operations as well as most activities were running on runway 35L and runway 35R. Departures were approved on runway 26. Decathlon was doing closed patterns on runway 35L. Seminole was departing runway 26. I observed decathlon in an apparent go around. I launched seminole with the assumption that decathlon had gone around on his own. Decathlon reported that he did a stop-and-go. Incident is under investigation at this time for a possible runway incursion.

Original NASA ASRS Text

Title: GFK CTLR DESCRIBES POSSIBLE LOSS OF SEPARATION DURING INTERSECTING RWY OPS.

Narrative: RWYS 35L AND 26 INTERSECT. CLOSED PATTERN OPS AS WELL AS MOST ACTIVITIES WERE RUNNING ON RWY 35L AND RWY 35R. DEPS WERE APPROVED ON RWY 26. DECATHLON WAS DOING CLOSED PATTERNS ON RWY 35L. SEMINOLE WAS DEPARTING RWY 26. I OBSERVED DECATHLON IN AN APPARENT GAR. I LAUNCHED SEMINOLE WITH THE ASSUMPTION THAT DECATHLON HAD GONE AROUND ON HIS OWN. DECATHLON RPTED THAT HE DID A STOP-AND-GO. INCIDENT IS UNDER INVESTIGATION AT THIS TIME FOR A POSSIBLE RWY INCURSION.

Data retrieved from NASA's ASRS site as of January 2009 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.