# Accident 20010516009149A: Amtr PIETENPOLAIR, Tulsa, OK, May 16, 2001 - Type: FAA accident report (Accident/Incident Data System), as reported - Date: May 16, 2001, 19:39 local time - Place: Tulsa, OK - Damage: Substantial damage - Phase of flight: Fcd/Prec Ldg From Cruise - Operating rules: General operating rules (Part 91) - Location: 36.0496° N, 96.0194° W: From the FAA, an estimate near the named town, within about 3 miles - Nearby events: https://openairdocs.org/map.md?lat=36.0496&lon=-96.0194&mi=10 - Aircraft: N25157, a cancelled registration (https://openairdocs.org/deregistered/N25157-2013-08-06) (OpenAirDocs) - Registry model: Kirchner PIETENPOL AIRCAMPER (registry code 7040319, https://openairdocs.org/model/kirchner-pietenpol-aircamper) (OpenAirDocs) - Registry engine: Amateur-built UNKNOWN ENG (registry code 99999, https://openairdocs.org/engine/amateur-built-unknown-eng) (OpenAirDocs) - Reported make and model: AMTR PIETENPOLAIR - People aboard: 1 - Fatal injuries: 0 - Pilot flight hours: 1,000 total - NTSB investigation: [NTSB FTW01LA120](https://openairdocs.org/ntsb/FTW01LA120) (OpenAirDocs) - FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/) - Page: https://openairdocs.org/incident/20010516009149A ## Narrative As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^. (.19)ON MAY 16, 2001, AT 1939 CENTRAL DAYLIGHT TIME, A KIRCHNER PIETENPOL AIRCAMPER HOME BUILT AIRPLANE, N25157, WAS SUBSTANTIALLY DAMAGED DURING A FORCED LANDING FOLLOWING A LOSS OF ENGINE POWER NEAR TULSA, OKLAHOMA. THE AIRPLANE WAS OWNED AND OPERATED BY THE PRIVATE PILOT WHO WAS NOT INJURED. VISUAL METEOROLOGICAL CONDITIONS PREVAILED, AND A FLIGHT PLAN WAS NOT FILED FOR THE 14 CODE OF FEDERAL REGULATIONS PART 91 PERSONAL FLIGHT. THE FLIGHT ORIGINATED FROM THE SAND RIDGE AIRPORT NEAR COLLINSVILLE, OKLAHOMA, AT 1910, AND WAS DESTINED FOR THE RICHARD LLOYD JONES JR. AIRPORT, TULSA, OKLAHOMA. PRELIMINARY INFORMATION INDICATES THAT WHILE EN ROUTE, THE PILOT OBSERVED A RISE IN ENGINE OIL TEMPERATURE. THE PILOT ELECTED TO MAKE A PRECAUTIONARY LANDING AT THE HARVEY YOUNG AIRPORT; HOWEVER, ENGINE RPM DECREASED TO WHERE ALTITUDE COULD NOT BE MAINTAINED, AND THE PILOT INITIATED A FORCED LANDING TO A BEAN FIELD ABOUT ONE MILE NORTHEAST OF THE AIRPORT. DURING THE LANDING, THE AIRPLANE TOUCHED DOWN "HARD," NOSED OVER, AND CAME TO REST INVERTED. EXAMINATION OF THE AIRPLANE BY FAA INSPECTORS WHO RESPONDED TO THE ACCIDENT SITE, REVEALED THAT THE LANDING GEAR HAD COLLAPSED AND PARTIALLY SEPARATED. THE RIGHT WING SPAR OUTBOARD OF THE LIFT STRUT WAS FRACTURED, AND THE VERTICAL STABILIZER WAS DAMAGED. (-23)THE PILOT STATED HE DEPARTED THE COLLINSVILLE, OK AIRPORT ENROUTE TO JENKS, OK. SOON AFTER DEPARTURE HE NOTICED THE OIL TEMPERATURE WAS INDICATING MAXIMUM TEMPERATURE. ALL OTHER INDICATIONS APPEARING NORMAL HE ELECTED TO CONTINUE THE FLIGHT. SHORTLY THEREAFTER THE ENGINE BEGAN LOSING POWER AND THE PILOT ELECTED TO LAND IN A BEAN FIELD APPROXIMATELY ONE MILE NORTHEAST OF HARVEY YOUNG AIRPORT IN TULSA, OK. THE PILOT REPORTED THE AIRCRAFT STALLED AT APPROXIMATELY 10 FEET IN THE AIR AND IMPACTED THE GROUND IN A RIGHT WING LOW ATTITUDE. SUBSTANTIAL DAMAGE WAS SUSTAINED TO THE LANDING GEAR, PROPELLER AND RIGHT WING. THE PILOT VOLUNTARILY DISCLOSED THAT HIS MEDICAL CERTIFICATE WAS INVALID DUE TO A HEART CONDITION. THIS REPORT TO BE AMENDED AFTER ENGINE TEAR DOWN IN ACCOMPLISHED. (.4) ON MAY 16, 2001, AT 1939 CENTRAL DAYLIGHT TIME, A KIRCHNER PIETENPOL AIRCAMPER HOME BUILT AIRPLANE, N25157, WAS SUBSTANTIALLY DAMAGED DURING A FORCED LANDING FOLLOWING A LOSS OF ENGINE POWER NEAR TULSA, OKLAHOMA. THE AIR PLANE WAS OWNED AND OPERATED BY THE PILOT. THE PRIVATE PILOT, SOLE OCCUPANT, WAS NOT INJURED. VISUAL METEOROLOGICAL CONDITIONS PREVAILED, AND A FLIGHT PLAN WAS NOT FILED FOR THE 14 CODE OF FEDERAL REGULATIONS PART 91 PERSONAL FLIGHT. THE FLIGHT ORIGINATED FROM THE SAND RIDGE AIRPORT NEAR COLLINSVILLE, OKLAHOMA, AT 1910, AND WAS DESTINED FOR THE RICHARD LLOYD JONES JR. AIRPORT, TULSA, OKLAHOMA. WHILE EN ROUTE, THE PILOT OBSERVED A RISE IN ENGINE OIL TEMPERATURE. THE PILOT ELECTED TO MAKE A PRECAUTIONARY LANDING AT THE HARVEY YOUNG AIRPORT; HOWEVER, ENGINE RPM DECREASED TO WHERE ALTITUDE COULD NOT BE MAINTAINED. THE PILOT INITIATED A FORCED LANDING TO A BEAN FIELD ABOUT ONE MILE NORTHEAST OF THE AIRPORT. DURING THE LANDING, THE AIRPLANE TOUCHED DOWN "HARD," NOSED OVER, AND CAME TO REST INVERTED. EXAMINATION OF THE AIRPLANE BY FAA INSPECTORS, WHO RESPONDED TO THE ACCIDENT SITE, REVEALED THAT THE MAIN LANDING GEAR HAD COLLAPSED AND WAS PARTIALLY SEPARATED. THE RIGHT WING SPAR OUTBOARD OF THE LIFT STRUT WAS FRACTURED, AND THE VERTICAL STABILIZER WAS DAMAGED. AN EXAMINATION OF THE CORVAIR AUTOMOTIVE ENGINE, BY THE OWNER, REVEALED A STUCK OIL COOLER THERMOSTAT VALVE. THE THERMOSTAT VALVE WAS FOUND STUCK IN THE POSITION THAT WOULD PREVENT OIL FROM FLOWING THROUGH THE OIL COOLER. ADDITIONALLY, PIECES OF A BROKEN PISTON RING WERE FOUND IN THE ENGINE'S OIL SUMP. ATTEMPTS TO OBTAIN A COMPLETED PILOT/OPERATOR AIRCRAFT ACCIDENT REPORT, NTSB FORM 6120.1/2, FROM THE PILOT/OWNER WERE UNSUCCESSFUL. ## 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 FTW01LA120](https://openairdocs.org/ntsb/FTW01LA120), May 17, 2001: Kirchner Pietenpol Aircamper (N25157), Tulsa, OK, substantial damage. Probable cause: the pilot's inadequate flare during the forced landing, which resulted in a hard landing. A contributing factor was the engine overheating due a stuck oil cooler thermostat valve, which resulted in a… ## Other reports on N25157 (1) Matched to the same aircraft by N-number and date. - [Accident 19790921031679A](https://openairdocs.org/incident/19790921031679A), Sep 21, 1979: Amtrpl AIRCAMPER (N25157), Minneapolis, MN, Substantial damage. Left landing gear wheel & axle separated from aircraft on landing roll. Veered off runway. Defect in welding. 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.