NTSB investigations: Amateur-built UNKNOWN ENG
61 cases on aircraft whose registry engine model is Amateur-built UNKNOWN ENG, where the first occurrence was “Loss of engine power(total) - mech failure/malf”. Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.
Cases per year
| 1982 | 3 |
|---|---|
| 1984 | 2 |
| 1985 | 3 |
| 1986 | 1 |
| 1988 | 3 |
| 1989 | 1 |
| 1990 | 1 |
| 1991 | 2 |
| 1992 | 3 |
| 1993 | 2 |
| 1995 | 4 |
| 1996 | 4 |
| 1998 | 1 |
| 1999 | 2 |
| 2000 | 5 |
| 2003 | 5 |
| 2004 | 4 |
| 2005 | 4 |
| 2006 | 5 |
| 2007 | 6 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "SELECT c.\"ntsbNumber\", c.\"eventDate\", c.\"eventType\", c.\"eventCity\", c.\"eventStateOrRegion\", a.n_number, a.\"aircraftMake\", a.\"aircraftModel\", c.\"highestInjuryLevel\", c.\"totalFatal\", c.\"completionStatus\", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c.\"mKey\" AND a.position = 1
WHERE c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('99999')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o.\"occurrenceNumber\" = 1 AND o.\"occurrenceCode\" = 351))
ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('99999')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 351))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB LAX08CA033Accident · Minor injuriesData collectionFinal reportSenft/Anderson/salmon C-5 · Tucson, AZa total loss of engine power due to the failure of the number 3 articulating rod.NTSB CHI07CA262Accident · No injuriesData collectionFinal reportBeech BE-77 · Bloomington, INThe loss of engine power due to fuel exhaustion as a result of the pilot's inadequate preflight.NTSB SEA07FA195Accident · 1 fatalField investigationFinal reportYakovlev YAK-55M · Everett, WAThe pilot's inadequate preflight planning and inspection that led to oil exhaustion and a catastrophic engine failure. Also causal was the pilot's attempted operation of an aircraft with known deficiencies, and the lack of a current airworthiness inspection.…NTSB LAX07LA197Accident · Minor injuriesLimited investigationFinal reportEvenson Roger J Vans RV-9A · Tucson, AZthe loss of engine power during takeoff-initial climb, which resulted from the owner/builder's improper adjustment of the supercharger waste gate valve, that resulted in the failure of the waste gate servo motor.NTSB ATL07CA084Accident · No injuriesData collectionFinal reportRotorway Rotorway Intl 162F · Argyle, NYThe loss of engine power due to the sticking of the exhaust valves that resulted from carbon buildup.NTSB SEA07LA095Accident · No injuriesLimited investigationFinal reportDiemert/Rotorway Exec 162 F · Roseburg, ORa total loss of engine power due to the failure of the primary and secondary electronic control units (ECU's) within the engine's Fully Automated Digital Electronic Control.NTSB LAX07CA063Accident · No injuriesData collectionFinal reportBelcher Helicycle · Boulder City, NVa loss of engine power due to a fractured fuel line.NTSB NYC07LA026Accident · 1 fatalLimited investigationFinal reportVogel Glastar 41 · Snow Shoe, PAThe builder's improper installation of an additional alternator. Contributing to the accident were the night lighting conditions.NTSB SEA06LA167Accident · Minor injuriesLimited investigationFinal reportKinnson Lancair IV-P Turbine · Helena, MTThe total loss of engine power as a result of turbine over temperature due to the pilot's failure to follow proper procedures for engine operation. A contributing factor was the lack of suitable terrain for the ensuing forced landing.NTSB SEA06CA080Accident · No injuriesData collectionFinal reportPitrolo GL-25 · Worden, MTThe loss of engine power due to failure of both electronic ignition systems. A contributing factor was the lack of suitable terrain for the forced landing.NTSB SEA06LA074Accident · No injuriesLimited investigationFinal reportCentral Copters Lancair IV-P · Belgrade, MTThe total loss of drive power to the aircraft's propeller while on a visual final approach, due to the decoupling of the quill shaft between the reduction gearbox and the engine power section. Factors include a dark night, no suitable terrain on which to…NTSB IAD05LA144Accident · Serious injuriesLimited investigationFinal reportHoward Whyte Nieuport 28 · Dayton, OHA loss of engine power due to the installation of incorrect spring type terminal contacts which were accidentally supplied by the engine distributor.NTSB SEA05LA189Accident · No injuriesLimited investigationFinal reportBallhagen/Shyrock Q-2 · Kalispell, MTThe pilot/owner's improper setting of the engine's valve clearance, leading to the failure of the exhaust valves to fully close and a total loss of power while on a VFR downwind, and the pilot/owner's failure to maintain sufficient airspeed as he tried to…NTSB ATL05LA052Accident · No injuriesLimited investigationFinal reportWSK PZL Mielec M-18A · Macedonia, SCThe fatigue cracking of the planetary gear housing, which resulted in the loss of engine power.NTSB IAD05LA033Accident · No injuriesLimited investigationFinal reportGhiles MCR-01 VLA · Cincinnati, OHA total loss of engine power due to an oil hose collapse, which resulted in failure of the #4 connecting rod.NTSB CHI05CA032Accident · Serious injuriesData collectionFinal reportOlson Sonex · Oconomowoc, WIThe loss of engine power due to a fatigue fracture of the crankshaft. An additional cause to the accident was the pilot/builder's failure to verify the dimensions of the shrink-fit crankshaft components prior reassembling the engine. A factor to the accident…NTSB NYC04LA201Accident · No injuriesLimited investigationFinal reportPZL 101 · Chazy, NYThe total loss of engine power due to the fractured crankshaft.NTSB LAX04LA229Accident · No injuriesLimited investigationFinal reportSimmons BD-5 · Goodyear, AZThe overheating and failure of the number 4 connecting rod, which resulted in a total loss of engine power during descent.NTSB CHI04CA142Accident · No injuriesData collectionFinal reportKauffman Bede IV · Acme, MIEngine oil starvation and inadequate maintenance by the pilot.NTSB LAX04LA069Accident · Serious injuriesLimited investigationFinal reportAllison KR-2 · Glendale, AZloss of engine power due to a loose carburetor jet. A contributing factor was the owner/operators failure to have a condition inspection performed on the aircraft.NTSB CHI04LA019Accident · No injuriesLimited investigationFinal reportBeech A36 · Davenport, IAA loss of engine power due to fuel starvation as a result of the improper installation of the fuel nozzle. Also causal was the engine manufacturer's improper installation instructions for the nozzle pressure port plug on the fuel manifold valve. A factor…NTSB CHI03LA214Accident · No injuriesLimited investigationFinal reportAyres S2R-G10 · Staples, MNThe fatigue fracture of the oil jet flange resulting in a total engine failure during the aerial application.NTSB ATL03LA106Accident · No injuriesLimited investigationFinal reportPolstra Zodiac CH 601 HDS · Thomson, GAThe total loss of engine power due to the fatigue fracture of the No. 3 cylinder intake valve, which resulted in a forced landing to rough terrain and subsequent collision with small trees and a tree stump.NTSB MIA03LA080Accident · Serious injuriesLimited investigationFinal reportDitommasso-Keminski Great Lakes 2T-1A · Daytona Beach, FLThe pilot's improper preflight planning/decision to perform a second flight with known deficiencies in equipment, and his failure to maintain airspeed above the airplane's stall speed while maneuvering to reverse direction to land, after the engine…NTSB LAX00LA350Accident · No injuriesLimited investigationFinal reportWorgull Hornet · Camp Verde, AZSeparation of the forward spark plug due to wear damage to the cylinder head threads. A factor in the accident was traffic on the highway and the pilot having to maneuver to avoid the traffic.NTSB CHI00LA226Accident · 1 fatalLimited investigationFinal reportHalsmer Crazy 8 · Lafayette, INAircraft control not being maintained by the pilot during the forced landing. Factors to the accident were the engine failure due to an overtemperature, the pilot's lack of familiarity with the aircraft, and the trees.NTSB NYC00LA156Accident · Minor injuriesLimited investigationFinal reportStewart S-51 · Forty Fort, PAThe owner/builder's inadequate design, resulting in total failure of the reduction gear assembly accessory drive shaft.NTSB FTW00LA178Accident · Minor injuriesLimited investigationFinal reportGulfstream-Schweizer G-164D · Welsh, LAThe excessive wear of the reduction gearbox's 1st stage sungear, which resulted in its subsequent fatigue fracture and failure. Factors were the operator not performing the recommended overhaul of the engine, and a lack of suitable terrain for the forced…NTSB MIA00LA132Accident · Serious injuriesLimited investigationFinal reportHartline Glastar · Woodstock, ALa total engine failure for undetermined reason, resulting in a forced landing and subsequent impact with a tree.NTSB LAX00LA034Accident · Serious injuriesLimited investigationFinal reportHawker Siddeley Hunter T MK 7 · Mesa, AZThe fatigue failure and separation the stage 3 compressor blades due to corrosion pitting of the blade retention lug bores. A factor in the accident was the failure of the various post military surplus operators of this engine to incorporate the…NTSB LAX99LA304Accident · Minor injuriesLimited investigationFinal reportGlover Teenie TWO · Chino, CAThe in-flight separation and loss of the carburetor fuel jet resulting from the pilot's improper installation of the component. Also causal was the pilot's failure to maintain an adequate airspeed margin following the loss of power, which resulted in an…NTSB LAX98LA192Accident · No injuriesLimited investigationFinal reportArner Challenger II S · Pleasant Valley, AZLoss of engine power due to a loose spark plug wire cap caused by a broken spark plug retainer spring.NTSB SEA96LA196Accident · Serious injuriesLimited investigationFinal reportWestcott Glasair I-FT · Puyallup, WAfailure of the air inlet screen, and subsequent ingestion of the foam air filter. An inadequate maintenance modification by the amateur builder and no suitable landing area were related factors.NTSB NYC96LA117Accident · Minor injuriesLimited investigationFinal reportCessna 177B · Chatham, MAfailure of the oil pump, which resulted in oil starvation and subsequent failure of the number two and four cylinder connecting rods. Also causal was inadequate maintenance by noncompliance with the airworthiness directive that required replacement of the oil…NTSB FTW96FA216Accident · 2 fatalField investigationFinal reportNanchang CJ-6A · Shreveport, LAa loss of engine power due to failure of the pressure carburetor diaphragm which led to restricted fuel flow through the carburetor and eventual fuel starvation. Factors contributing to the accident were the unsuitable terrain and tall trees which resulted in…NTSB FTW96LA132Accident · No injuriesLimited investigationFinal reportGrumman G-164A · Dewitt, ARa loss of engine power due to the malfunction of the carburetor as a result of an improper overhaul. A factor was the unsuitable terrain for the forced landing.NTSB LAX95LA309Accident · No injuriesLimited investigationFinal reportJosephson MC-15 Cricket · San Diego, CAthe failure of the left engine due to inadequate maintenance of the ignition system.NTSB NYC95FA188Accident · 1 fatalField investigationFinal reportBeech 58 · Mapleton, METhe pilot inadvertently shut down the right engine and feathered the propeller after a loss of power in the left engine, and he failed to maintain adequate airspeed, which resulted in an inadvertent stall/spin and collision with the ground. A factor relating…NTSB FTW95LA317Accident · Minor injuriesLimited investigationFinal reportGrumman G-164A · Mccrory, ARThe loss of engine power due to a cracked cylinder. A factor was the lack of suitable terrain for the forced landing.NTSB CHI95LA117Accident · No injuriesLimited investigationFinal reportLewis KR-2 · Ogallala, NEthe owner/builder's improper maintenance (installation). Factors were the carburetor reversed and the mixture control cable not secured.NTSB ANC93IA176Incident · No injuriesIncident investigationFinal reportSikorsky C54A · Anita Bay, AKThe separation of the turbine blade from the power turbine disc.NTSB SEA93LA150Accident · No injuriesLimited investigationFinal reportHoopes Hummelbird · Salt Lake City, UTA fractured crankshaft.NTSB NYC92IA129Incident · No injuriesIncident investigationFinal reportBoeing 767-231ER · Jamica, NYThe failure of the fifth stage low pressure turbine vanes due to fatigue.NTSB FTW92LA132Accident · No injuriesLimited investigationFinal reportSchweizer G-164D · Welsh, LAThe engine failure at liftoff due to the failure of multiple turbine blades and the pilot's inability to maintain directional control during the aborted takeoff.NTSB LAX92LA208Accident · No injuriesLimited investigationFinal reportCorbus/Winters BD-5B · Fresno, CAThe total loss of engine power during initial climb due to a fracture and failure of the engine starter ring gear. A contributing factor which was related to the mechanical failure was the airplane owner's inadequate maintenance.NTSB NYC91DNC04Accident · Minor injuriesFinal reportLaurent A. Cloutier BD-5B · Gilford, NHEngine failure due to a faulty oil pressure relief valve resulting in an emergency landing on unsuitable terrain.NTSB SEA91LA092Accident · Minor injuriesLimited investigationFinal reportSmelser KR-2 · Spokane, WAA failure of the fuel drain valve which resulted in fuel exhaustion and a loss of engine power.NTSB SEA91LA031Accident · No injuriesLimited investigationFinal reportBeech 3NM · Bozeman, MTThe failure of the right engine master rod.NTSB DEN89LA165Accident · Minor injuriesLimited investigationFinal reportHenry Vickers HCV-110 · Newcastle, WYThe failure to the magneto. The selection of a powerplant with a single magneto system was an improper choice and directly contributed to the cause. The pilot's misjudgement of the wind for the approach to a forced landing resulted in an improper ground…NTSB MIA89LA053Accident · Minor injuriesLimited investigationFinal reportPilatus P-2/05 · St. Augustine, FLAfter an en route stop, the pilot took off in the newly acquired acft. Shortly after gear and flap retraction, the eng sustained a partial loss of power. The plt stated that all eng gages appeared normal and a turn was begun in an attempt to return to the…