# Accident 19990612006829A: Amtr SX300, Ogden, UT, June 12, 1999 - Type: FAA accident report (Accident/Incident Data System), as reported - Date: June 12, 1999, 12:00 local time - Place: Ogden, UT - Airport: Hill Afb Airport - Damage: Substantial damage - Phase of flight: Ground Taxi, Other Airplane - Operating rules: General operating rules (Part 91) - Location: 41.1198° N, 111.9793° W: From the FAA, an estimate near the named town, within about 3 miles - Nearby events: https://openairdocs.org/map.md?lat=41.1198&lon=-111.9793&mi=10 - Aircraft: N120J, registered now (https://openairdocs.org/aircraft/N120J) (OpenAirDocs) - Registry model: Butler John R SX 300 (registry code 05612VN, https://openairdocs.org/model/butler-john-r-sx-300) (OpenAirDocs) - Registry engine: Lycoming IO-540 series (registry code 41530, https://openairdocs.org/engine/lycoming-io-540-series) (OpenAirDocs) - Reported make and model: AMTR SX300 - People aboard: 1 - Fatal injuries: 0 - Pilot flight hours: 19,414 total, 900 in this make and model, 20 in the last 90 days - NTSB investigation: [NTSB DEN99LA100](https://openairdocs.org/ntsb/DEN99LA100) (OpenAirDocs) - FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/) - Page: https://openairdocs.org/incident/19990612006829A ## Narrative As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^. ACFT WAS INVOLVED IN AN AIR SHOW WHEN ITS LEFT MAIN LANDING GEAR COLLAPSED ON LANDING. (FROM .19) ON JUNE 12, 1999, AT 1200 MOUNTAIN DAYLIGHT TIME, A BUTLER SX-300 HOMEBUILT AIRCRAFT, N120J, SUSTAINED SUBSTANTIAL DAMAGE WHEN THE LEFT MAIN LANDING GEAR COLLAPSED DURING TAXI FROM LANDING AT HILL AFB, UTAH. THE COMMERCIAL PILOT WAS NO INJURED. VISUAL METEOROLOGICAL CONDITIONS PREVAILED FOR THIS AIR SHOW FLIGHT OPERATING UNDER TITLE 14 CFR PART 91 AND NO FLIGHT PLAN WAS FILED. THE FLIGHT DEPARTED HILL AFB AT 1150. ACCORDING TO PRELIMINARY INFORMATION, THE PILOT WAS TAXIING THE AIRCRAFT TO THE RAMP FOLLOWING LANDING AND THE LEFT MAIN LANDING GEAR COLLAPSED WHEN HE MADE A TURN. (-23) SEE ATTACHED SHEET (.4) ON JUNE 12, 1999, AT 1200 MOUNTAIN DAYLIGHT TIME, A BUTLER SX-300 HOMEBUILT EXPERIMENTAL AIRCRAFT, N120J, SUSTAINED SUBSTANTIAL DAMAGE WHEN THE LEFT MAIN LANDING GEAR COLLAPSED DURING TAXI FROM LANDING AT HILL AFB, OGDEN, UTAH. THE COMMERCIAL PILOT AND SOLE OCCUPANT WAS NOT INJURED. VISUAL METEOROLOGICAL CONDITIONS PREVAILED FOR THIS AIR SHOW FLIGHT OPERATING UNDER TI TLE 14 CFR PART 91 AND NO FLIGHT PLAN WAS FILED. THE FLIGHT DEPARTED SALT LAKE CITY, UTAH, EARLIER IN THE DAY. THE PILOT SAID HE WAS TAXIING THE AIRCRAFT TO THE RAMP FOLLOWING LANDING AND THE LEFT MAIN LANDING GEAR COLLAPSED WHEN HE MADE A TURN. ACCORDING TO THE FEDERAL AVIATION ADMINISTRATION (FAA) INSPECTOR WHO EXAMINED THE AIRCRAFT FOLLOWING THE ACCIDENT, THE PILOT HAD LANDING GEAR PROBLEMS A FEW DAYS BEFORE THE ACCIDENT. THE PILOT RELATED TO THE FAA INSPECTOR THAT HE HAD HEARD A LOUD "BANG/THUMP" FROM THE LANDING GEAR BUT COULD NOT FIND THE ORIGIN. IN A POST-ACCIDENT EXAMINATION, THE FAA INSPECTOR EXAMINED THE LEFT LANDING GEAR AND DETERMINED THE STRUT'S OUTER TRUNNION FLANGE HAD CRACKED AND BROKE FREE FROM ITS ATTACHMENT BOLT. THE INSPECTOR SAID THIS ACTION ALLOWED THE STRUT TO ROTATE FORWARD. WITH THIS ROTATION, THE ACTUATOR RAM THREADED ROD END BENT, THEN SNAPPED FREE FROM THE SELF-ALIGNING ANTI-FRICTION ROD END ASSEMBLY. THE STRUT CONTINUED FORWARD AND IMPACTED THE FUSELAGE CAUSING DAMAGE TO A STRUCTURAL BULKHEAD. BOTH SIDES OF THE EMPENNAGE SUSTAINED DAMAGE AND EXHIBITED WRINKLED SKIN PANELS. ## The NTSB's investigation of this event (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB DEN99LA100](https://openairdocs.org/ntsb/DEN99LA100), Jun 12, 1999: Butler SX-300 (N120J), Hill Afb, UT, substantial damage. Probable cause: A failure of the left main landing gear attachment for undetermined reasons. ## Other reports on N120J (2) Matched to the same aircraft by N-number and date. - [Accident 20120103000289A](https://openairdocs.org/incident/20120103000289A), Jan 3, 2012: Butler John R SX 300 (N120J), Truth Or Conseq, NM, Substantial damage. On January 3, 2012, at 1220 MST a Butler SX-30, N120J, registered to rainbow sports, inc., sustained a hard landing while on a personal flight, visual… - [Incident 20010903023639I](https://openairdocs.org/incident/20010903023639I), Sep 3, 2001: Amtr SX300 (N120J), Salt Lake City, UT, Minor damage. (-23) Aircraft departed slc, on climbout pilot noticed that the hydraulic power pack advisory light indicated it was still operating. Pilot turned the circuit… From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.