Small aircraft X excursion from runway on landing, landing gear collapsed.

Attributes
ACN	165965
Time
Date	199012
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : bis
State Reference	ND
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : bis
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	landing other
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : radar
ASRS Report	165965
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	aircraft equipment problem : less severe inflight encounter : weather other anomaly other
Independent Detector	other controllera
Resolutory Action	flight crew : declared emergency other
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

I was working the tower and approach when small aircraft X entered the pattern from Y19. At this time his radio worked fine and for the next 2 touch and go's. On the 3 downwind, I cleared him for a touch and go runway 31, no response. He continued with the pattern and did a low approach. On his next downwind, I cleared him for touch and go, no response. This time he wobbled his wings as he did another low approach. On the next downwind, I gave him a green light from our light gun. He landed and as he passed A-4 intersection he began to veer to the right (all gears appeared in place on touchdown and final). He continued to veer to right and left the runway 31 at the intersection of runway 31 and runway 35 on the north side. His gear apparently collapsed after getting mirred in the grass and snow. There were no apparent injuries. The min the aircraft left the runway I called our airport and they responded quickly. The aircraft was later taxied back into the GA ramp after getting its gear pinned in place. In the future, a pattern aircraft needs to go to NORDO circling pattern if they lose radio in pattern, and not keep doing the pattern.

Original NASA ASRS Text

Title: SMA X EXCURSION FROM RWY ON LNDG, LNDG GEAR COLLAPSED.

Narrative: I WAS WORKING THE TWR AND APCH WHEN SMA X ENTERED THE PATTERN FROM Y19. AT THIS TIME HIS RADIO WORKED FINE AND FOR THE NEXT 2 TOUCH AND GO'S. ON THE 3 DOWNWIND, I CLRED HIM FOR A TOUCH AND GO RWY 31, NO RESPONSE. HE CONTINUED WITH THE PATTERN AND DID A LOW APCH. ON HIS NEXT DOWNWIND, I CLRED HIM FOR TOUCH AND GO, NO RESPONSE. THIS TIME HE WOBBLED HIS WINGS AS HE DID ANOTHER LOW APCH. ON THE NEXT DOWNWIND, I GAVE HIM A GREEN LIGHT FROM OUR LIGHT GUN. HE LANDED AND AS HE PASSED A-4 INTXN HE BEGAN TO VEER TO THE R (ALL GEARS APPEARED IN PLACE ON TOUCHDOWN AND FINAL). HE CONTINUED TO VEER TO R AND L THE RWY 31 AT THE INTXN OF RWY 31 AND RWY 35 ON THE N SIDE. HIS GEAR APPARENTLY COLLAPSED AFTER GETTING MIRRED IN THE GRASS AND SNOW. THERE WERE NO APPARENT INJURIES. THE MIN THE ACFT LEFT THE RWY I CALLED OUR ARPT AND THEY RESPONDED QUICKLY. THE ACFT WAS LATER TAXIED BACK INTO THE GA RAMP AFTER GETTING ITS GEAR PINNED IN PLACE. IN THE FUTURE, A PATTERN ACFT NEEDS TO GO TO NORDO CIRCLING PATTERN IF THEY LOSE RADIO IN PATTERN, AND NOT KEEP DOING THE PATTERN.

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.