# NTSB investigations: 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.

Page 12 of 29 · 1,408 cases

## Cases, newest first

- [NTSB LAX94FA165](https://openairdocs.org/ntsb/LAX94FA165.md): Ayres S-2R · Reno, NV · Accident · 2 fatal · Field investigation · Final report · Mar 16, 1994 · N40237 · Destroyed
  > An undetermined problem with the engine oil system, a decision to fly the airplane with a known deficiency, and progressive (partial) failure of the engine master rod and bearing.
- [NTSB SEA94LA082](https://openairdocs.org/ntsb/SEA94LA082.md): Cessna 185 · Fort Lewis, WA · Accident · No injuries · Limited investigation · Final report · Mar 13, 1994 · N4732E · Substantial damage
  > The fuel shutoff valve seized in a partially open position.
- [NTSB MIA94LA090](https://openairdocs.org/ntsb/MIA94LA090.md): Cessna TU206F · Crystal River, FL · Accident · No injuries · Limited investigation · Final report · Mar 8, 1994 · N8319Q · Substantial damage
  > The failure of the no 1 piston connecting rod for undetermined causes. The lack of suitable terrain for a forced landing was a factor.
- [NTSB NYC94LA054](https://openairdocs.org/ntsb/NYC94LA054.md): Cessna 172L · Mt. Sterling, KY · Accident · Minor injuries · Limited investigation · Final report · Mar 6, 1994 · N19679 · Substantial damage
  > Inadequate maintenance which resulted in the disconnection of the throttle cable from the carburetor and the subsequent loss of engine power. Factors were the annual inspection not performed, and complacency.
- [NTSB LAX94LA114](https://openairdocs.org/ntsb/LAX94LA114.md): Cessna 150F · Borrego Springs, CA · Accident · Serious injuries · Limited investigation · Final report · Feb 6, 1994 · N8855S · Substantial damage
  > 1) the pilot's decision to takeoff in an aircraft with a known, yet unresolved, engine performance deficiency, and 2) the pilot's failure to maintain an adequate airspeed while maneuvering back to the runway. A factor in the accident was the weld repair of…
- [NTSB MIA94LA050](https://openairdocs.org/ntsb/MIA94LA050.md): Aerospatiale AS-350 · Lakeland, FL · Accident · Serious injuries · Limited investigation · Final report · Jan 13, 1994 · N902BA · Destroyed
  > The pilot-in-command's failure to follow the emergency procedure in the flight manual for governor malfunction. Contributing to the accident was inadequate written procedures in the flight manual by the aircraft manufacturer.
- [NTSB ATL94LA025](https://openairdocs.org/ntsb/ATL94LA025.md): Sikorsky H34-G · Walterboro, SC · Accident · Minor injuries · Limited investigation · Final report · Dec 1, 1993 · N8503J · Substantial damage
  > The seizure of the aircraft throttle to engine linkage for unknown reasons.
- [NTSB BFO94LA010](https://openairdocs.org/ntsb/BFO94LA010.md): Gulfstream American AA-5B · Sterling, MA · Accident · Minor injuries · Limited investigation · Final report · Nov 14, 1993 · N28215 · Substantial damage
  > Separation of the number one exhaust valve due to fatigue cracking which resulted in loss of engine power. Other related factors were misjudgment of altitude and airspeed by the pilot resulting in on ground collision with the terrain and subsequent nose over.
- [NTSB BFO94LA001](https://openairdocs.org/ntsb/BFO94LA001.md): Univair Ercoupe 415E · Willis, VA · Accident · No injuries · Limited investigation · Final report · Nov 1, 1993 · N94440 · Substantial damage
  > the failure of the airplane's throttle cable fitting due to undetermined reasons, which prevented the pilot from applying power above engine idle. A factor in this accident was the lack of suitable terrain for the pilot to complete a forced landing without…
- [NTSB FTW93LA268](https://openairdocs.org/ntsb/FTW93LA268.md): Cessna 182G · Baytown, TX · Accident · No injuries · Limited investigation · Final report · Sep 25, 1993 · N2149R · Substantial damage
  > The fuel starvation power loss due to a sticking carburetor float. A factor was the lack of suitable terrain onto which a forced landing could be executed.
- [NTSB FTW93LA260](https://openairdocs.org/ntsb/FTW93LA260.md): Cessna A188B · Manila, AR · Accident · No injuries · Limited investigation · Final report · Sep 19, 1993 · N731UF · Substantial damage
  > Partial loss of engine power due to the collapse of an air induction hose.
- [NTSB CHI93LA359](https://openairdocs.org/ntsb/CHI93LA359.md): Cessna 172F · Indianapolis, IN · Accident · No injuries · Limited investigation · Final report · Sep 12, 1993 · N5678R · Substantial damage
  > The failure of the left magneto, which resulted in a partial loss of engine power.
- [NTSB ATL93LA157](https://openairdocs.org/ntsb/ATL93LA157.md): Air Tractor AT301 · Deatsville, AL · Accident · No injuries · Limited investigation · Final report · Sep 11, 1993 · N36613 · Substantial damage
  > Was a crack in no.3 cylinder head which resulted in the loss of engine power.
- [NTSB MIA93FA190](https://openairdocs.org/ntsb/MIA93FA190.md): Beech 35 · Frisco, NC · Accident · Serious injuries · Field investigation · Final report · Sep 6, 1993 · N88V · Substantial damage
  > The pilot's failure to maintain airspeed (vso) resulting in a stall/mush. Contributing to the accident was the near total loss of engine power due to separation of one of the two counterweights for undetermined reasons.
- [NTSB LAX93LA345](https://openairdocs.org/ntsb/LAX93LA345.md): Cessna 172G · Avalon, CA · Accident · No injuries · Limited investigation · Final report · Sep 6, 1993 · N4143L · Destroyed
  > the oil starvation related failure of the number 1 and 2 connecting rods due to improper torque of the crankcase through bolts at the number 2 cylinder, which allowed fretting of the bearing surfaces and the resulting closure of the oil ports. The under…
- [NTSB BFO93LA162](https://openairdocs.org/ntsb/BFO93LA162.md): Sterner Super CAT · Cherryville, PA · Accident · No injuries · Limited investigation · Final report · Sep 6, 1993 · N531SC · Substantial damage
  > The movement of a thumbscrew on the fuel filter system which resulted in fuel flow blockage and subsequent partial power loss. A factor in this accident was the lack of suitable terrain for the emergency landing.
- [NTSB FTW93FA251](https://openairdocs.org/ntsb/FTW93FA251.md): Cessna 182C · Porter, TX · Accident · 3 fatal · Field investigation · Final report · Sep 4, 1993 · N8488T · Destroyed
  > Partial loss of engine power for undetermined reasons. Factors in the accident which may have contributed were the distorted and separated muffler components resulting from improper maintenance by an unknown person.
- [NTSB CHI93LA343](https://openairdocs.org/ntsb/CHI93LA343.md): Cessna T210N · Lake In The Hil, IL · Accident · No injuries · Limited investigation · Final report · Aug 31, 1993 · N6649N · Substantial damage
  > Chafing of a fuel system line.
- [NTSB NYC93LA176](https://openairdocs.org/ntsb/NYC93LA176.md): Champion Citabria 7-GCBC · Fire Island, NY · Accident · Minor injuries · Limited investigation · Final report · Aug 28, 1993 · N5029L · Substantial damage
  > Failure of the #4 cylinder valve stem.
- [NTSB SEA93LA181](https://openairdocs.org/ntsb/SEA93LA181.md): Hiller UH-12E · Auburn, WA · Accident · No injuries · Limited investigation · Final report · Aug 23, 1993 · N9785C · Substantial damage
  > Failure of the connecting rod bolt. The high vegetation was a factor.
- [NTSB SEA93LA180](https://openairdocs.org/ntsb/SEA93LA180.md): Beech C23 · Lakeview, OR · Accident · No injuries · Limited investigation · Final report · Aug 21, 1993 · N6547R · Substantial damage
  > A fractured exhaust valve. The rough terrain was a factor.
- [NTSB CHI93DEC01](https://openairdocs.org/ntsb/CHI93DEC01.md): Bradford Pietenpol Skyscout · Eaton Rapids, MI · Accident · Minor injuries · Final report · Aug 21, 1993 · N4301D · Substantial damage
  > the pilot's failure to maintain airspeed which resulted in an inadvertant stall. Factors related to the accident were the low altitude and the restricted movement of the carburetor needle.
- [NTSB LAX93LA327](https://openairdocs.org/ntsb/LAX93LA327.md): Air Tractor AT-301 · Dos Palos, CA · Accident · No injuries · Limited investigation · Final report · Aug 18, 1993 · N2330V · Substantial damage
  > The failure of the master rod which resulted in a complete loss of engine power and subsequent forced landing. The irrigation ditch was a factor in this accident.
- [NTSB CHI93LA325](https://openairdocs.org/ntsb/CHI93LA325.md): Cessna 152-II · Keokuk, IA · Accident · No injuries · Limited investigation · Final report · Aug 17, 1993 · N47716 · Substantial damage
  > the loss of engine power due to an exhaust valve failure. A factor related to the accident is the power line.
- [NTSB FTW93LA239](https://openairdocs.org/ntsb/FTW93LA239.md): Grumman-Schweizer G-164A · Garwood, TX · Accident · No injuries · Limited investigation · Final report · Aug 13, 1993 · N7993 · Substantial damage
  > The partial power loss for undetermined reasons. A factor was the lack of suitable terrain onto which a forced landing could be executed.
- [NTSB CHI93LA311](https://openairdocs.org/ntsb/CHI93LA311.md): Piper PA-28R-200 · Millard, NE · Accident · No injuries · Limited investigation · Final report · Aug 6, 1993 · N233LC · Substantial damage
  > Improper maintenance/inspection of the aircraft by (other) maintenance personnel, and subsequent blockage of the induction air system by an object (alternate air door) that was not removed during previous maintenance.
- [NTSB FTW93FA229](https://openairdocs.org/ntsb/FTW93FA229.md): Cessna 152 · Houston, TX · Accident · 1 fatal · Field investigation · Final report · Aug 5, 1993 · N24893 · Destroyed
  > Company management's dispatch of an airplane with known deficiencies, their failure to correct the deficiencies, and the student pilot's inadvertent entry into a stall. Factors which contributed to the accident were: chafed wiring, fouled spark plugs, a…
- [NTSB BFO93LA142](https://openairdocs.org/ntsb/BFO93LA142.md): North American AT-6 · Matawan, NJ · Accident · No injuries · Limited investigation · Final report · Jul 30, 1993 · N6617X · Substantial damage
  > The water collection in the ignition harness which rendered the lower cylinder spark plugs inoperative resulting in partial power loss.
- [NTSB CHI93LA282](https://openairdocs.org/ntsb/CHI93LA282.md): Grumman G164 · Brule, NE · Accident · No injuries · Limited investigation · Final report · Jul 29, 1993 · N8368 · Substantial damage
  > The unsuitable terrain encountered. Factors relating to this accident include total failure of an engine cylinder, and a hidden obstruction.
- [NTSB FTW93LA216](https://openairdocs.org/ntsb/FTW93LA216.md): Cessna 172N · Purcell, OK · Accident · No injuries · Limited investigation · Final report · Jul 25, 1993 · N4884G · Substantial damage
  > The lack of suitable terrain onto which to execute the forced landing which was neccesitated by the partial power loss. The power loss was a result of the fatigue failure of the exhaust valve rocker arm attachment stud. A factor was the night conditions.
- [NTSB CHI93DTG02](https://openairdocs.org/ntsb/CHI93DTG02.md): Aero Commander S2R · Hoople, ND · Accident · No injuries · Final report · Jul 18, 1993 · N5635X · Substantial damage
  > A loss of engine power due to a cracked engine cylinder.
- [NTSB CHI93LA256](https://openairdocs.org/ntsb/CHI93LA256.md): Quad City Challenger II Specia · Ottawa, IL · Accident · Minor injuries · Limited investigation · Final report · Jul 13, 1993 · N415JR · Substantial damage
  > The pilot in command's failure to maintain proper clearance. Factors to the accident include an oil fouled spark plug and a power ground cable.
- [NTSB LAX93LA286](https://openairdocs.org/ntsb/LAX93LA286.md): Stephens VP2 · Lodi, CA · Accident · No injuries · Limited investigation · Final report · Jul 11, 1993 · N31349 · Substantial damage
  > the grounding of the magneto coil to the magneto case due to a crack in the coil sheath.
- [NTSB LAX93FA282](https://openairdocs.org/ntsb/LAX93FA282.md): Piper PA-34-200 · La Verne, CA · Accident · Minor injuries · Field investigation · Final report · Jul 8, 1993 · N1392T · Destroyed
  > The flight instructor's failure to obtain/maintain best the single-engine rate-of-climb airspeed, and his failure to ensure that the landing gear was retracted. A factor related to the accident was contamination in the fuel system, which blocked fuel flow…
- [NTSB FTW93LA201](https://openairdocs.org/ntsb/FTW93LA201.md): Mooney M20J · Spring, TX · Accident · Minor injuries · Limited investigation · Final report · Jun 30, 1993 · N3740H · Substantial damage
  > The pilot's improperly planned approach and the resultant overshoot of the intended landing area. Factors were the partial power loss due to internal corrosion, and the inadvertent stall.
- [NTSB NYC93LA129](https://openairdocs.org/ntsb/NYC93LA129.md): Piper PA-28-236 · West Milford, NJ · Accident · Serious injuries · Limited investigation · Final report · Jun 27, 1993 · N8220J · Substantial damage
  > A manufacturer's defect which resulted in fatigue failure of the magneto impluse coupling spring and the loss of engine power. A factor was unsuitable terrain.
- [NTSB FTW93LA191](https://openairdocs.org/ntsb/FTW93LA191.md): Cessna 150L · Navasota, TX · Accident · Minor injuries · Limited investigation · Final report · Jun 16, 1993 · N11069 · Substantial damage
  > Partial power loss due to left magneto fluctuating due to loose coil. A factor was the lack of suitable terrain for the forced landing
- [NTSB MIA93LA143](https://openairdocs.org/ntsb/MIA93LA143.md): Hughes 369HS · Orlando, FL · Accident · Minor injuries · Limited investigation · Final report · Jun 15, 1993 · N500RT · Substantial damage
  > Unsuitable terrain encountered during the autorotative forced landing. Contributing to the accident was total loss of engine power due to seizure of the compressor impeller following failure of the no.2 bearing for undetermined reasons.
- [NTSB CHI93LA205](https://openairdocs.org/ntsb/CHI93LA205.md): Cessna 172P · Hartford, WI · Accident · No injuries · Limited investigation · Final report · Jun 14, 1993 · N55404 · Substantial damage
  > The failure of the number four cylinder and unsuitable terrain.
- [NTSB ANC93IA093](https://openairdocs.org/ntsb/ANC93IA093.md): Cessna 206 · Portage, AK · Incident · No injuries · Incident investigation · Final report · Jun 13, 1993 · N4672U · Minor damage
  > The failure of the number two cylinder connecting rod bearing due to the shifting of the bearing within its journal race which produced an oil starvation/thermal distress event.
- [NTSB DEN93LA068](https://openairdocs.org/ntsb/DEN93LA068.md): Cessna 172N · Livermore, CO · Accident · No injuries · Limited investigation · Final report · Jun 11, 1993 · N4829E · Substantial damage
  > A partial power loss when the rocker box for one cylinder disengaged. A factor was: unsuitable terrain for a forced landing.
- [NTSB FTW93LA178](https://openairdocs.org/ntsb/FTW93LA178.md): Bell-Transworld 47G-2 · Wynne, AR · Accident · No injuries · Limited investigation · Final report · Jun 5, 1993 · N9238Z · Substantial damage
  > Partial power loss due to the failure of one magneto. A factor was the lack of suitable terrain for the forced landing.
- [NTSB FTW93LA169](https://openairdocs.org/ntsb/FTW93LA169.md): Grumman G-164A · Weiner, AR · Accident · No injuries · Limited investigation · Final report · May 27, 1993 · N4593 · Substantial damage
  > Partial power loss due to improper installation of the linkage control bracket. 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 FTW93LA152](https://openairdocs.org/ntsb/FTW93LA152.md): Elliott B-80 · Amarillo, TX · Accident · No injuries · Limited investigation · Final report · May 12, 1993 · N42845 · Destroyed
  > The pilot's failure to compensate for wind conditions. Factors were the loss of engine power and the tailwind
- [NTSB CHI93LA166](https://openairdocs.org/ntsb/CHI93LA166.md): Cessna 175 · Houghton Lake, MI · Accident · Minor injuries · Limited investigation · Final report · May 9, 1993 · N7303M · Destroyed
  > The pilot operating the airplane with a known deficiency.
- [NTSB BFO93LA076](https://openairdocs.org/ntsb/BFO93LA076.md): Hockenbury Bowers FLY Baby · Peapack, NJ · Accident · Minor injuries · Limited investigation · Final report · May 9, 1993 · N80PH · Substantial damage
  > The failure of the throttle valve actuating arm which resulted in partial opening of the throttle valve. A factor related to the accident was the unsuitable terrain available for landing.
- [NTSB MIA93LA104](https://openairdocs.org/ntsb/MIA93LA104.md): Air Tractor AT-401 · Fort Pierce, FL · Accident · Minor injuries · Limited investigation · Final report · Apr 17, 1993 · N7316L · Destroyed
  > Failure of the no. 2 cylinder in fatigue for undetermined reasons, over unsuitable terrain. The lack of suitale terrain for the forced landing was a factor.
- [NTSB BFO93FA063](https://openairdocs.org/ntsb/BFO93FA063.md): Piper PA-28-140 · Edgewater, MD · Accident · 1 fatal · Field investigation · Final report · Apr 17, 1993 · N56430 · Destroyed
  > The pilot's improper in-flight planning/decision after selecting the wrong runway for a precautionary landing, which resulted in an inadvertent descent into transmission lines, while attempting to maneuver back to the runway. Factors related to the accident…
- [NTSB SEA93LA092](https://openairdocs.org/ntsb/SEA93LA092.md): Taylorcraft BL-65 · Spokane, WA · Accident · Minor injuries · Limited investigation · Final report · Apr 10, 1993 · N29553 · Substantial damage
  > Failure of the number 4 cylinder exhaust valve seat and the inadvertent stalling of the aircraft by the pilot in command. Factors contributing to the accident were buildings and power lines.

Next page: https://openairdocs.org/ntsb.md?occurrence=352&page=13

## 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."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&page=12

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