# NTSB investigations, ID: Loss of engine power(partial) - mech failure/malf NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports. ## Latest cases - [NTSB SEA04LA065](https://openairdocs.org/ntsb/SEA04LA065.md): Grumman G-164 · Nezperce, ID · Accident · No injuries · Limited investigation · Final report · Apr 5, 2004 · N48564 · Substantial damage > The circumferential fracture of the number seven cylinder head while en route to an aerial fertilizer application, leading to a forced landing on soft terrain, resulting in the collapse of the right main gear leg. Factors include soft terrain at the location… - [NTSB SEA03LA146](https://openairdocs.org/ntsb/SEA03LA146.md): Cessna 182S · Henry's Lake, ID · Accident · No injuries · Limited investigation · Final report · Jul 21, 2003 · N146NE · Substantial damage > A set of inadequately torqued vacuum pump retaining nuts, leading to the failure of the vacuum pump gasket, resulting in oil exhaustion, which resulted in a loss of engine power during cruise. A ditch and rough uneven terrain were factors. - [NTSB SEA02LA121](https://openairdocs.org/ntsb/SEA02LA121.md): Grumman-Schweizer G-164B · Shelley, ID · Accident · Minor injuries · Limited investigation · Final report · Jul 4, 2002 · N297AL · Destroyed > A loss of engine power due to the manufacturer's improperly machined threads, which prevented the cylinder base/head halves from being properly assembled, leading to fatigue propagation and the ultimate separation of the cylinder. A contributing factor was… - [NTSB SEA99LA107](https://openairdocs.org/ntsb/SEA99LA107.md): Grumman-Schweizer G-164A · New Plymouth, ID · Accident · No injuries · Limited investigation · Final report · Jul 7, 1999 · N7869 · Substantial damage > Loss of engine power due to failure of the supercharger impeller. A contributing factor was the ditch. - [NTSB SEA98FA077](https://openairdocs.org/ntsb/SEA98FA077.md): Garlick UH-1H · Hope, ID · Accident · No injuries · Field investigation · Final report · May 19, 1998 · N98NW · Substantial damage > Failure of a misaligned main bearing in the engine. Factors include returning a previously unairworthy-tagged engine to service by the operator's maintenance personnel without sufficient information to identify and correct an unknown engine deficiency. - [NTSB SEA96LA155](https://openairdocs.org/ntsb/SEA96LA155.md): Grumman G-164A · New Plymouth, ID · Accident · No injuries · Limited investigation · Final report · Jul 15, 1996 · N48442 · Substantial damage > a cracked cylinder head, which resulted in partial loss of engine power during takeoff. Factors relating to the accident were: the pilot allowed the gross weight of the airplane to be exceeded, and tall wheat (crop) in the emergency landing area. - [NTSB SEA95LA177](https://openairdocs.org/ntsb/SEA95LA177.md): Piper PA-31 · Boise, ID · Accident · No injuries · Limited investigation · Final report · Aug 6, 1995 · N9111Y · Substantial damage > improper adjustment of the engine fuel control units by company maintenance personnel which led to excessive fuel flow and subsequent partial loss of engine power. Factors contributing to the accident were the rough terrain and high density altitude. - [NTSB SEA95LA165](https://openairdocs.org/ntsb/SEA95LA165.md): Grumman G-164A · Buhl, ID · Accident · 1 fatal · Limited investigation · Final report · Jul 29, 1995 · N48471 · Substantial damage > The loss of power due to the failure of an engine cylinder. The chemical load was not dumped for undetermined reasons and contributed to the severity of injuries. - [NTSB SEA95LA154](https://openairdocs.org/ntsb/SEA95LA154.md): Air Tractor AT-301 · Roberts, ID · Accident · No injuries · Limited investigation · Final report · Jul 17, 1995 · N4326S · Substantial damage > A loss of engine power due to the separation of the number 3 cylinder exhaust valve rocker arm shaft from the cylinder head, which disabled movement of the exhaust valve. A factor was the lack of suitable terrain for the forced landing. - [NTSB SEA93LA120](https://openairdocs.org/ntsb/SEA93LA120.md): Cessna 185A · Lowell, ID · Accident · No injuries · Limited investigation · Final report · May 23, 1993 · N4080Y · Substantial damage > Fatigue of the rocker arm and unsuitable terrain which was encountered during the precautionary landing. - [NTSB SEA91LA139](https://openairdocs.org/ntsb/SEA91LA139.md): Cessna 180G · Challis, ID · Accident · Minor injuries · Limited investigation · Final report · Jun 22, 1991 · N4700U · Substantial damage > That the pilot encountered unsuitable terrain during a forced landing after a power loss due to a fractured cylinder boss and a bent engine pushrod. - [NTSB SEA89LA071](https://openairdocs.org/ntsb/SEA89LA071.md): Air Tractor AT-301 · Grangeville, ID · Accident · Minor injuries · Limited investigation · Final report · Apr 17, 1989 · N4340S · Substantial damage > A partial power loss due to a blower failure. A factor related to the accident was the soft field condition. - [NTSB SEA85LA214](https://openairdocs.org/ntsb/SEA85LA214.md): Bell 206BII · Atlanta, ID · Accident · Minor injuries · Limited investigation · Final report · Sep 14, 1985 · N58012 · Destroyed > A loss of pwr occurred shortly before touchdown. The left skid struck a rock during touchdown causing the acft to roll onto its right side. Twenty-five flt hrs prior to this flt an identical situation occurred and a loose air line to the fuel control was… - [NTSB SEA85LA178](https://openairdocs.org/ntsb/SEA85LA178.md): Bell 47G-3B-1 · Idaho City, ID · Accident · No injuries · Limited investigation · Final report · Jun 11, 1985 · N1333X · Substantial damage > While the student plt was on a x-country flt, the eng lost power after the supercharger failed. The plt stated that he was unable to maintain altitude & RPM; he subsequently made a forced landing in a heavily timbered, mountainous area. - [NTSB SEA84LA199](https://openairdocs.org/ntsb/SEA84LA199.md): Rockwell Thrush SR2 · Nampa, ID · Accident · No injuries · Limited investigation · Final report · Aug 14, 1984 · N5553X · Substantial damage > The acft began to lose power while engaged in aerial application so the plt dumped his load and headed for the airstrip. Enroute the power deteriorated so the plt elected to land. Cutting the mixture gave the engine a surge which caused an overshoot into… - [NTSB SEA83LA043](https://openairdocs.org/ntsb/SEA83LA043.md): Bellanca 17-30A · Pocatello, ID · Accident · No injuries · Limited investigation · Final report · Jan 17, 1983 · N28163 · Substantial damage > During a missed approach a partial power loss occurred during the transition to climb. The plt executed a course reversal to return visually to the arpt. Shortly thereafter he chose to execute an emergency landing on a frontage road which paralleled rr… ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql 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."eventStateOrRegion" = 'ID' AND c."eventCountry" = 'USA' AND c."mKey" IN (SELECT o.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o."occurrenceNumber" = 1 AND o."occurrenceCode" = 352) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?occurrence=352&state=ID --- 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.