Aircraft landed with left main gear retracted. This was a known malfunction.

Attributes
ACN	1287952
Time
Date	201508
Local Time Of Day	1201-1800
Place
Locale Reference	HIO.Airport
State Reference	OR
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	VFR Route
Flight Plan	VFR
Person 1
Function	Local
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 1
Events
Anomaly	ATC Issue All Types Aircraft Equipment Problem Critical Ground Event / Encounter Gear Up Landing

Narrative:

Aircraft X departed VFR. Shortly after take-off the pilot advised local of a gear malfunction/issue. Aircraft X performed a low approach over the runway and we observed the pilot side of the gear retracted while the co-pilot gear appeared down. Aircraft X circled the airspace for a few minutes until the fire brigade arrived at the airport. Aircraft X landed and came to a stop/disabled at [runways] intersection. No injuries; unknown damage; pilot was sole occupant; 3 hours of fuel. I contacted one of the airport's FBO who dispatched a crew to assist the aircraft. My shift ended prior to the aircraft being removed from the runway.everything went smooth except for the phone calls from the service desk.

Original NASA ASRS Text

Title: Aircraft landed with left main gear retracted. This was a known malfunction.

Narrative: Aircraft X departed VFR. Shortly after take-off the pilot advised local of a gear malfunction/issue. Aircraft X performed a low approach over the runway and we observed the pilot side of the gear retracted while the co-pilot gear appeared down. Aircraft X circled the airspace for a few minutes until the fire brigade arrived at the airport. Aircraft X landed and came to a stop/disabled at [runways] intersection. No injuries; unknown damage; pilot was sole occupant; 3 hours of fuel. I contacted one of the airport's FBO who dispatched a crew to assist the aircraft. My shift ended prior to the aircraft being removed from the Runway.Everything went smooth except for the phone calls from the Service desk.

Data retrieved from NASA's ASRS site 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.