# Thorp T-18 - Type: Aircraft model (FAA registry) - Registry codes: 89510T7, 89510T8, 89510T3, 89510TC, 89510TD, 89510TF, 89510UB, 89510S7, 89510S8, 89510TA, 89510TB, 89510TE, 89510TJ, 89510TU, 89510TZ, 89510UC, 89510S6, 89510TG, 89510TH, 89510TM, 89510TP, 89510TX, 89510TY - Manufacturer (registry): THORP - Model: T-18 - Aircraft type: Fixed wing single engine - Category: Airplane - Engines: 1 · Reciprocating - Seats: 2 - Weight class: Up to 12,499 lb - Cruise speed: 97 mph - Certification: Not type certificated - Registered aircraft: 26 - Page: https://openairdocs.org/model/thorp-t-18 Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker. The FAA lists this model under more than one registry code, usually for different spellings of the maker. This page covers them all. ## ADs that may apply (OpenAirDocs) Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. None matched. ## Registered aircraft (26) - [N1118M](https://openairdocs.org/aircraft/N1118M): [Brown Brent R](https://openairdocs.org/faa-owner/BROWN%20BRENT%20R), [Edmond, OK](https://openairdocs.org/faa-place/OK/Edmond), built 1970, S/N 390 - [N11DC](https://openairdocs.org/aircraft/N11DC): [11dc LLC](https://openairdocs.org/faa-owner/11DC%20LLC), [Broomfield, CO](https://openairdocs.org/faa-place/CO/Broomfield), S/N 31 - [N12055](https://openairdocs.org/aircraft/N12055): [Twigg John M](https://openairdocs.org/faa-owner/TWIGG%20JOHN%20M), [Pittsburgh, PA](https://openairdocs.org/faa-place/PA/Pittsburgh), built 1974, S/N 79 - [N1488](https://openairdocs.org/aircraft/N1488): [Booth Mac E](https://openairdocs.org/faa-owner/BOOTH%20MAC%20E), [Independence, OR](https://openairdocs.org/faa-place/OR/Independence), S/N 303 - [N18JF](https://openairdocs.org/aircraft/N18JF): [Finney Bruce R](https://openairdocs.org/faa-owner/FINNEY%20BRUCE%20R), [Yelm, WA](https://openairdocs.org/faa-place/WA/Yelm), built 1970, S/N 262 - [N18JT](https://openairdocs.org/aircraft/N18JT): [Bourget Marc J](https://openairdocs.org/faa-owner/BOURGET%20MARC%20J), [Stockton, CA](https://openairdocs.org/faa-place/CA/Stockton), built 1972, S/N 02 - [N18Z](https://openairdocs.org/aircraft/N18Z): [Mays Paul R](https://openairdocs.org/faa-owner/MAYS%20PAUL%20R), [Toney, AL](https://openairdocs.org/faa-place/AL/Toney), built 1971, S/N 394 - [N198NF](https://openairdocs.org/aircraft/N198NF): [Guldi James E](https://openairdocs.org/faa-owner/GULDI%20JAMES%20E), [Port Orange, FL](https://openairdocs.org/faa-place/FL/Port%20Orange), S/N 587 - [N2287C](https://openairdocs.org/aircraft/N2287C): [Kounovsky Jerry F](https://openairdocs.org/faa-owner/KOUNOVSKY%20JERRY%20F), [Tucson, AZ](https://openairdocs.org/faa-place/AZ/Tucson), built 1967, S/N 272 - [N249R](https://openairdocs.org/aircraft/N249R): [Fields Travis](https://openairdocs.org/faa-owner/FIELDS%20TRAVIS), [Lees Summit, MO](https://openairdocs.org/faa-place/MO/Lees%20Summit), built 1972, S/N 06 - [N25002](https://openairdocs.org/aircraft/N25002): [Ramsey Hudson Q](https://openairdocs.org/faa-owner/RAMSEY%20HUDSON%20Q), [Cleburne, TX](https://openairdocs.org/faa-place/TX/Cleburne), built 1972, S/N 257 - [N262PE](https://openairdocs.org/aircraft/N262PE): [Porter Randall L](https://openairdocs.org/faa-owner/PORTER%20RANDALL%20L), [Athol, ID](https://openairdocs.org/faa-place/ID/Athol), built 1971, S/N 492 - [N2721](https://openairdocs.org/aircraft/N2721): [Laney James R](https://openairdocs.org/faa-owner/LANEY%20JAMES%20R), [Granbury, TX](https://openairdocs.org/faa-place/TX/Granbury), S/N 329 - [N2911](https://openairdocs.org/aircraft/N2911): [Dewinter Thomas A](https://openairdocs.org/faa-owner/DEWINTER%20THOMAS%20A), [Waunakee, WI](https://openairdocs.org/faa-place/WI/Waunakee), built 1968, S/N 86 - [N3098](https://openairdocs.org/aircraft/N3098): [Feuerman Jerrold B](https://openairdocs.org/faa-owner/FEUERMAN%20JERROLD%20B), [Denver, CO](https://openairdocs.org/faa-place/CO/Denver), built 1972, S/N 488 - [N312LL](https://openairdocs.org/aircraft/N312LL): [Nilsen Christopher](https://openairdocs.org/faa-owner/NILSEN%20CHRISTOPHER), [Livermore, CA](https://openairdocs.org/faa-place/CA/Livermore), built 1964, S/N 194 - [N338Q](https://openairdocs.org/aircraft/N338Q): [Jones Thomas P](https://openairdocs.org/faa-owner/JONES%20THOMAS%20P), [Quartz Hill, CA](https://openairdocs.org/faa-place/CA/Quartz%20Hill), built 1971, S/N 70 - [N380G](https://openairdocs.org/aircraft/N380G): [Paxton Ronald R](https://openairdocs.org/faa-owner/PAXTON%20RONALD%20R), [Colorado Springs, CO](https://openairdocs.org/faa-place/CO/Colorado%20Springs), built 1972, S/N 380 - [N4083B](https://openairdocs.org/aircraft/N4083B): [Ross Andrew P](https://openairdocs.org/faa-owner/ROSS%20ANDREW%20P), [Sparks, NV](https://openairdocs.org/faa-place/NV/Sparks), S/N 24 - [N427H](https://openairdocs.org/aircraft/N427H): [Kerr Kevin](https://openairdocs.org/faa-owner/KERR%20KEVIN), [Spring Hill, FL](https://openairdocs.org/faa-place/FL/Spring%20Hill), S/N 427 - [N4588](https://openairdocs.org/aircraft/N4588): [Smithenry Eric J](https://openairdocs.org/faa-owner/SMITHENRY%20ERIC%20J), [Newton, IL](https://openairdocs.org/faa-place/IL/Newton), built 1973, S/N 671 - [N4784G](https://openairdocs.org/aircraft/N4784G): [Shinn Steven M Allen](https://openairdocs.org/faa-owner/SHINN%20STEVEN%20M%20ALLEN), [Larkspur, CO](https://openairdocs.org/faa-place/CO/Larkspur), built 1973, S/N 131 - [N5661](https://openairdocs.org/aircraft/N5661): [Bryant Billy Joe](https://openairdocs.org/faa-owner/BRYANT%20BILLY%20JOE), [Seymour, TN](https://openairdocs.org/faa-place/TN/Seymour), built 1971, S/N 588S - [N7199](https://openairdocs.org/aircraft/N7199): [Big Sky Flyers LLC](https://openairdocs.org/faa-owner/BIG%20SKY%20FLYERS%20LLC), [Billings, MT](https://openairdocs.org/faa-place/MT/Billings), built 1971, S/N 419F - [N76KR](https://openairdocs.org/aircraft/N76KR): [Sorensen Bjarne K](https://openairdocs.org/faa-owner/SORENSEN%20BJARNE%20K), [Vero Beach, FL](https://openairdocs.org/faa-place/FL/Vero%20Beach), built 1983, S/N 353 - [N77AK](https://openairdocs.org/aircraft/N77AK): [Rivers Paul E](https://openairdocs.org/faa-owner/RIVERS%20PAUL%20E), [Shannon, IL](https://openairdocs.org/faa-place/IL/Shannon), built 1969, S/N 390-A ## NTSB investigations (24) 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 WPR16LA023](https://openairdocs.org/ntsb/WPR16LA023), Nov 6, 2015: Thorp T 18 (N1488), Independence, OR, substantial damage. Probable cause: A separation of the canopy mechanism during flight, which resulted in the pilot’s precautionary landing and the airplane’s subsequent collision with a fence post. - [NTSB CEN12LA566](https://openairdocs.org/ntsb/CEN12LA566), Aug 21, 2012: Thorp T-18 (N2443), Gilmer, TX, substantial damage. Probable cause: The disconnected metering unit fuel line, which resulted in a loss of engine power. - [NTSB SEA08LA127](https://openairdocs.org/ntsb/SEA08LA127), May 9, 2008: Thorp T-18 (N8613A), Kent, WA, substantial damage, 1 fatal. Probable cause: The loss of engine power for undetermined reasons. Contributing to the accident were the lack of a suitable landing area and the pilot's failure to maintain an adequate airspeed while maneuvering in… - [NTSB SEA07CA185](https://openairdocs.org/ntsb/SEA07CA185), Jun 26, 2007: Hammer Thorp T-18 (N3715), Everett, WA, substantial damage. Probable cause: Excessive airspeed during a return for landing which resulted in an overrun. An unlatched canopy, a proper touchdown point not attained and rough terrain were factors. - [NTSB ATL04CA180](https://openairdocs.org/ntsb/ATL04CA180), Sep 11, 2004: Wood/Thorpe T-18 (N49RT), Olive Branch, MS, substantial damage. Probable cause: The pilot's failure to maintain directional control of the airplane during landing. - [NTSB CHI94LA308](https://openairdocs.org/ntsb/CHI94LA308), Sep 2, 1994: Thalman Thorp T-18 (N2911), Kenosha, WI, substantial damage. Probable cause: the pilot's failure to use carburetor heat in carburetor icing conditions. A factor associated with the accident is the prevailing carburetor icing conditions. - [NTSB CHI92DEE02](https://openairdocs.org/ntsb/CHI92DEE02), Jun 13, 1992: Vandenbos/Thorp T-18 (N4PV), Schaumburg, IL, destroyed. Probable cause: SHORTING OF CONDENSERS ON BOTH MAGNETOS. A FACTOR WAS INADEQUATE MAINTENANCE SERVICING OF THE AIRPLANE BY OTHER MAINTNEANCE PERSONNEL. - [NTSB LAX89DUJ05](https://openairdocs.org/ntsb/LAX89DUJ05), Feb 22, 1989: Warwick Thorp T-18 (N9675Z), Aguila, AZ, substantial damage. Probable cause: FAILURE OF THE PILOT TO MAINTAIN DIRECTIONAL CONTROL, WHICH RESULTED IN THE AIRCRAFT VEERING OFF THE RUNWAY. FACTORS RELATED TO THE ACCIDENT WERE: UNEVEN RUNWAY & THE DITCH. - [NTSB FTW85LA127](https://openairdocs.org/ntsb/FTW85LA127), Feb 24, 1985: Thorpe T-18 (N40HB), Ada, OK, destroyed - [NTSB NYC80FHA18](https://openairdocs.org/ntsb/NYC80FHA18), Jun 22, 1980: Thorp T-18 (N59374), Quakertown, PA, destroyed, 2 fatal - [NTSB SEA79FYP21](https://openairdocs.org/ntsb/SEA79FYP21), May 11, 1979: Thorp T-18 (N1947), Zillah, WA, destroyed - [NTSB FTW78DPG89](https://openairdocs.org/ntsb/FTW78DPG89), Sep 10, 1978: Thorp T-18 (N18Z), N.Little Rock, AR, substantial damage - [NTSB CHI78DEP48](https://openairdocs.org/ntsb/CHI78DEP48), Jul 23, 1978: Thorp T18 (N2911), Kenosha, WI, substantial damage - [NTSB LAX77FUQ39](https://openairdocs.org/ntsb/LAX77FUQ39), Jul 8, 1977: Thorp T-18 (N56LU), Van Nuys, CA, destroyed, 1 fatal - [NTSB DEN77DQA06](https://openairdocs.org/ntsb/DEN77DQA06), Dec 1, 1976: Thorp T18 (N7LN), Santa Fe, NM, substantial damage - [NTSB CHI75FEM28](https://openairdocs.org/ntsb/CHI75FEM28), Feb 23, 1975: Thorp T-18 (N5564), Lansing, MI, destroyed - [NTSB FTW73FPA33](https://openairdocs.org/ntsb/FTW73FPA33), Jun 30, 1973: Thorp T-18 (N7995A), Whitesboro, TX, substantial damage - [NTSB MKC73FCG46](https://openairdocs.org/ntsb/MKC73FCG46), May 28, 1973: Thorp T-18 (N2721), Ozark, MO, substantial damage - [NTSB MIA72FLG37](https://openairdocs.org/ntsb/MIA72FLG37), May 6, 1972: Parks Thorp T-18 (N614DP), St.Matthews, SC, substantial damage - [NTSB DEN72FTM11](https://openairdocs.org/ntsb/DEN72FTM11), Mar 5, 1972: Thorp T-18 (N2043), Kearns, UT, destroyed, 1 fatal - [NTSB OAK70FVA14](https://openairdocs.org/ntsb/OAK70FVA14), May 2, 1970: Thorpe T-18 (N372RB), Huntington Lk, CA, destroyed, 2 fatal - [NTSB SEA70D0023](https://openairdocs.org/ntsb/SEA70D0023), Jul 1, 1969: Thorp T-18 (N3715), Puyallup, WA, substantial damage - [NTSB MKC68F0273](https://openairdocs.org/ntsb/MKC68F0273), Oct 22, 1967: Thorp T-18 (N18117), Anoka, MN, substantial damage - [NTSB OAK67D0331](https://openairdocs.org/ntsb/OAK67D0331), May 21, 1967: Thorp T-18 (N4083B), Lone Pine, CA, destroyed ## FAA accident and incident reports (17) 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. - [Accident 20151106020799A](https://openairdocs.org/incident/20151106020799A), Nov 6, 2015: Thorp T-18 (N1488), Independence, OR, Substantial damage. On departure for second trip around the traffic pattern, canopy support beam failed causing the aft portion of the canopy to separate from the aircraft.… - [Accident 20120821019029A](https://openairdocs.org/incident/20120821019029A), Aug 21, 2012: Thorp T-18 (N2443), Gilmer, TX, Destroyed. On August 21, 2012 the aircraft took off from fox-Stephens Field (kjxi) on rwy 18 and upon climb out the engine lost power. The aircraft subsequently crashed… - [Accident 20080509837109A](https://openairdocs.org/incident/20080509837109A), May 9, 2008: Amtr T18 (N8613A), Kent, WA, Destroyed, 1 fatal. (-23) This was the pilot's first flight of the airplane after being in storage since April 6, 2007. On may 1, 2007, the engine carburetor was replaced with an… - [Accident 20070626009959A](https://openairdocs.org/incident/20070626009959A), Jun 26, 2007: Amtr T18 (N3715), Everett, WA, Substantial damage. (-23) After take off from runway 34L at pae, aircraft reported an open canopy and declared an emergency. Aircraft attempted to land on runway 11 and bounced… - [Incident 20060422005109I](https://openairdocs.org/incident/20060422005109I), Apr 22, 2006: Amtr T18 (N11DC), Longmont, CO, Minor damage. (-23) While on a pleasure flight, the pilot and sole occupant of a homebuilt aircraft encountered minor damage to the top of the right wing after being hit by… - [Accident 20040911021429A](https://openairdocs.org/incident/20040911021429A), Sep 11, 2004: Amtr T18 (N49RT), Olive Branch, MS, Substantial damage. (-23) During landing aircraft veered to the left side of runway and then back across departing the right side hitting a tree. - [Incident 20001104024619I](https://openairdocs.org/incident/20001104024619I), Nov 4, 2000: Amtr T18 (N5GL), Danville, IL. (-23) On 11/4/00 at approx. 1115 CDT while on a personal pleasure flight from Danville, IL., in the local area, the appropriately rated pilot experienced a… - [Accident 19940901034039A](https://openairdocs.org/incident/19940901034039A), Sep 1, 1994: Amtrth THORPT18 (N2911), Kenosha, WI, Substantial damage. Lost power on takeoff. Landed on runway but ran off end. Nosed over. Carb icing beleived problem. - [Incident 19940508017009I](https://openairdocs.org/incident/19940508017009I), May 8, 1994: Amtrth THORPT18 (N18117), Ft Worth, TX, Minor damage. Engine RPM dropped in flight. Forced landing in field. Found foreign material in fuel line. - [Accident 19920613019869A](https://openairdocs.org/incident/19920613019869A), Jun 13, 1992: Amtrth THORPT18 (N4PV), Chicago/Schaumb, IL, Destroyed. Engine quit on takeoff. Crash landed in a pond. Both mags inop. Shorted. Burned pitted points. Mags corroded. - [Incident 19901019054189I](https://openairdocs.org/incident/19901019054189I), Oct 19, 1990: Amtrth THORPT18 (N4PV), Chicago/West Ch, IL, Minor damage. Pilot over corrected with forward pitch on landing. Propeller struck runway. - [Accident 19890222002489A](https://openairdocs.org/incident/19890222002489A), Feb 22, 1989: Amtrth THORPT18 (N9675Z), Aguila, AZ, Substantial damage. Lost control after hitting a rise on the runway on landing. Veered off into ditch. Nosed over. Failed to go around. - [Incident 19860828053009I](https://openairdocs.org/incident/19860828053009I), Aug 28, 1986: Amtrth THORPT18 (N4PV), West Chicago, IL, Minor damage. Veered off side of runway after crosswind landing. Touchdown was left of center line of runway. - [Incident 19860423022409I](https://openairdocs.org/incident/19860423022409I), Apr 23, 1986: Amtrth THORPT18 (N312LL), Detroit, MI, Minor damage. Bounced on landing and lost directional control. Departed side of runway and flipped over. - [Accident 19850224056189A](https://openairdocs.org/incident/19850224056189A), Feb 24, 1985: Amtrth THORPT18 (N40HB), Ada, OK, Destroyed. Total loss of power after takeoff. Stalled, impacted ground. Pilot did not lower nose. Sealant blocked fuel screen. - [Accident 19800622022359A](https://openairdocs.org/incident/19800622022359A), Jun 22, 1980: Amtrth THORPT18 (N59374), Milford, PA, Substantial damage, 1 fatal. Engine problem on go-around. Appears pilot stalled airplane trying to return to runway. Left mag defect noted. - [Accident 19790511011449A](https://openairdocs.org/incident/19790511011449A), May 11, 1979: Amtrth THORPT18 (N1947), Zillah, WA, Substantial damage. Propeller blade failure in flight. Prop was sensenich model M74DM modified for amateur aircraft only. ## The same model under other registry codes Amateur-built copies and renamed makers get their own codes. - [Ranck Amos D T-18](https://openairdocs.org/model/ranck-amos-d-t-18): 1 registered aircraft, registry code 056076Q - [Parker Don T-18](https://openairdocs.org/model/parker-don-t-18): 1 registered aircraft, registry code 056162H - [Henning Ray C T-18](https://openairdocs.org/model/henning-ray-c-t-18): 1 registered aircraft, registry code 056245D - [Johnston Coyt E T-18](https://openairdocs.org/model/johnston-coyt-e-t-18): 1 registered aircraft, registry code 05624BU - [Eversmeyer Larry D T-18](https://openairdocs.org/model/eversmeyer-larry-d-t-18): 1 registered aircraft, registry code 05624ZP - [Purvis T-18](https://openairdocs.org/model/purvis-t-18): 1 registered aircraft, registry code 8951012 - [Dearing T-18](https://openairdocs.org/model/dearing-t-18): 1 registered aircraft, registry code 8951076 - [Amateur Built T-18](https://openairdocs.org/model/amateur-built-t-18): 1 registered aircraft, registry code 89510BC - [Miller-Thorp T-18](https://openairdocs.org/model/miller-thorp-t-18): 1 registered aircraft, registry code 89510BF - [Roemer-Thorp T-18](https://openairdocs.org/model/roemer-thorp-t-18): 1 registered aircraft, registry code 89510BG - [Griffith-Thorp T-18](https://openairdocs.org/model/griffith-thorp-t-18): 1 registered aircraft, registry code 89510BH - [Godwin Robert L. JR. T-18](https://openairdocs.org/model/godwin-robert-l-jr-t-18): 1 registered aircraft, registry code 89510GK --- 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.