C172 pilot reported a near collision with an ultralight on the ground at lru.

Attributes
ACN	1048983
Time
Date	201211
Local Time Of Day	1201-1800
Place
Locale Reference	LRU.Airport
State Reference	NM
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	Visual Approach
Flight Plan	None
Aircraft 2
Make Model Name	Ultralight
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	Visual Approach
Person 1
Function	Instructor Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 30 Flight Crew Total 500 Flight Crew Type 150
Events
Anomaly	Conflict Ground Conflict Critical
Miss Distance	Horizontal 500 Vertical 0

Narrative:

A standard rectangular landing pattern was entered into after overflying lru 500 feet above published pattern altitude. Standard position calls were made while scanning for airborne aircraft/traffic on the ground. No position calls were received; no traffic was observed. A normal landing was made on runway 12. Prior to clearing runway 12 onto runway 8-22 (for taxi); an ultralight landed behind our aircraft. The ultralight did not come closer than 500 feet horizontally and our aircraft was able to clear the active without abnormal ground maneuvering. Upon taxi back to runway 12 we held short and again scanned for traffic. The ultralight was observed to turn 180 deg; and back taxi to the departure end of runway 12 as we held short ready to depart. The ultralight then turned off runway 12; headed nose-to-nose with us holding at the hold short line. It only passed by us by manipulating the wing to 'dip' it under our aircraft wing by mere inches; at a taxi speed that was unsafe for the situation; if such a 'safe' taxi speed could exist in this scenario. This ground maneuver posed an unnecessary risk to property; and was an unsafe act. No radio calls were received from the ultralight. Weather was greater than 10NM visibility with no cloud cover; in daylight.

Original NASA ASRS Text

Title: C172 pilot reported a near collision with an ultralight on the ground at LRU.

Narrative: A standard rectangular landing pattern was entered into after overflying LRU 500 feet above published pattern altitude. Standard position calls were made while scanning for airborne aircraft/traffic on the ground. No position calls were received; no traffic was observed. A normal landing was made on Runway 12. Prior to clearing Runway 12 onto Runway 8-22 (for taxi); an ultralight landed behind our aircraft. The ultralight did not come closer than 500 feet horizontally and our aircraft was able to clear the active without abnormal ground maneuvering. Upon taxi back to Runway 12 we held short and again scanned for traffic. The ultralight was observed to turn 180 deg; and back taxi to the departure end of Runway 12 as we held short ready to depart. The ultralight then turned off Runway 12; headed nose-to-nose with us holding at the hold short line. It only passed by us by manipulating the wing to 'dip' it under our aircraft wing by mere inches; at a taxi speed that was unsafe for the situation; if such a 'safe' taxi speed could exist in this scenario. This ground maneuver posed an unnecessary risk to property; and was an unsafe act. No radio calls were received from the ultralight. Weather was greater than 10NM visibility with no cloud cover; in daylight.

Data retrieved from NASA's ASRS site as of July 2013 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.