# 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 17 of 29 · 1,408 cases

## Cases, newest first

- [NTSB BFO90FA008](https://openairdocs.org/ntsb/BFO90FA008.md): Piper PA-28-181 · Laurel, MD · Accident · No injuries · Field investigation · Final report · Nov 5, 1989 · N47759 · Substantial damage
  > Lost of engine power caused by material failure of the number three cylinder exhaust valve. The failure was attributed to excessive temperature.
- [NTSB FTW90FA013](https://openairdocs.org/ntsb/FTW90FA013.md): Cessna 414 · San Antonio, TX · Accident · Serious injuries · Field investigation · Final report · Oct 19, 1989 · N5820H · Substantial damage
  > The failure of the right propeller unfeathering accumulator hose due to improper installation and chaffing, and the pilot's operation of the airplane beyond its engine out performance capability. Factors were inadequate company maintenance, and the pilot's…
- [NTSB NYC90LA008](https://openairdocs.org/ntsb/NYC90LA008.md): Cessna 150 · Madison, CT · Accident · No injuries · Limited investigation · Final report · Oct 9, 1989 · N50165 · Substantial damage
  > A loss of engine power, due to a stuck exhaust valve in the number 4 cylinder. Factors related to the accident were: the pilot's excessive airspeed on final approach, and his failure to attain the proper touchdown point during the landing.
- [NTSB ATL90LA005](https://openairdocs.org/ntsb/ATL90LA005.md): Cessna 120 · Maysville, KY · Accident · Minor injuries · Limited investigation · Final report · Oct 8, 1989 · N1829N · Substantial damage
  > The improper inspection of the airplanes engine by the pilot/owner resulting in five rocker box cover screws being missing and subsequent loss of engine oil due to the cover vibrating and causing a hole to be worn in it. Subsequent loss of engine power due to…
- [NTSB CHI89DEM10](https://openairdocs.org/ntsb/CHI89DEM10.md): Fletcher SONERAI-2L · Interlochen, MI · Accident · 1 fatal · Final report · Sep 30, 1989 · N76DJ · Destroyed
  > Loose cylinder due to improper maintenance by the pilot/owner, which resulted in overheating and failure of the aluminum cylinder head. The presence of trees was considered to be a factor.
- [NTSB CHI89LA191](https://openairdocs.org/ntsb/CHI89LA191.md): Bell 206B-3 · Chicago, IL · Accident · No injuries · Limited investigation · Final report · Sep 19, 1989 · N9229X · Substantial damage
  > A hard landing caused by the pilot not being able to judge his altitude above or his closure rate to terrain because of high vegetation in the area available for a forced landing. An engine faulure caused by material failure of the compressor section is a…
- [NTSB FTW89LA165](https://openairdocs.org/ntsb/FTW89LA165.md): Cessna 172N · Waxahachie, TX · Accident · No injuries · Limited investigation · Final report · Sep 17, 1989 · N738BB · Substantial damage
  > Failure of the #3 exhaust valve due to exposure to overtemperature operating conditions.
- [NTSB ATL89FA214](https://openairdocs.org/ntsb/ATL89FA214.md): Piper PA-28R-180 · Gordon, AL · Accident · 3 fatal · Field investigation · Final report · Sep 17, 1989 · N7503J · Substantial damage
  > The improper installation of the fuel gascolator bowl by maintenance personnel, which resulted in fuel leakage and a loss of fuel pressure to the engine.
- [NTSB DEN89LA214](https://openairdocs.org/ntsb/DEN89LA214.md): Piper PA-18A-150 · Winston, NM · Accident · Serious injuries · Limited investigation · Final report · Sep 12, 1989 · N9496D · Destroyed
  > Deteriorated carburetor float. Factors related to the accident were: high density altitude and the terrain conditions in the emergency landing area.
- [NTSB LAX89LA297](https://openairdocs.org/ntsb/LAX89LA297.md): Bell 206B · Murrieta, CA · Accident · No injuries · Limited investigation · Final report · Sep 6, 1989 · N111JG · Substantial damage
  > A partial loss of engine power due to contaminates in the fuel control unit. The origin of the contaminates was not determined. Contributing factor(s) was: the helicopter was not equipped with floats.
- [NTSB FTW89LA161](https://openairdocs.org/ntsb/FTW89LA161.md): Cessna 152 · Carmin, TX · Accident · No injuries · Limited investigation · Final report · Sep 5, 1989 · N94777 · Destroyed
  > Loss of power for an unknown reason. Factors related to the accident were the ditch & fence.
- [NTSB LAX89FA295](https://openairdocs.org/ntsb/LAX89FA295.md): North American P51D · Mar Vista, CA · Accident · Serious injuries · Field investigation · Final report · Sep 3, 1989 · N51MR · Substantial damage
  > The pilot's poor in-flight planning in attempting to immediately return to the airport and not following established procedures after the loss of power after takeoff. The failure of an intake valve was a factor in the accident.
- [NTSB LAX89LA298](https://openairdocs.org/ntsb/LAX89LA298.md): Stinson 108 · Cool, CA · Accident · No injuries · Limited investigation · Final report · Sep 1, 1989 · N97628 · Substantial damage
  > Failure of the #2 piston. Failure of the mechanic to properly overhaul the engine was a related factor.
- [NTSB LAX89LA282](https://openairdocs.org/ntsb/LAX89LA282.md): Beech B35 · San Diego, CA · Accident · Serious injuries · Limited investigation · Final report · Aug 20, 1989 · N8868A · Substantial damage
  > Loss of engine power for undetermined reasons. Factors that related to the accident were: unavaliable altitude, remedial action not possible, unsuitable terrain, high vegetation, and the trees.
- [NTSB NYC89LA195](https://openairdocs.org/ntsb/NYC89LA195.md): Enstrom 280C · Milbridge, ME · Accident · No injuries · Limited investigation · Final report · Aug 16, 1989 · N89JD · Substantial damage
  > Failure of the number 3 intake valve outer spring. The water (river) in the emergency landing area was a related factor.
- [NTSB LAX89LA273](https://openairdocs.org/ntsb/LAX89LA273.md): Cessna 172N · Seligman, AZ · Accident · Minor injuries · Limited investigation · Final report · Aug 13, 1989 · N5961J · Substantial damage
  > A loss of engine power due to a failure of the number 3 cylinder exhaust valve rocker arm pivot stud, which was in turn caused by a stuck exhaust valve.
- [NTSB LAX89LA267](https://openairdocs.org/ntsb/LAX89LA267.md): Grumman American AA-5B · Terminal Island, CA · Accident · No injuries · Limited investigation · Final report · Aug 8, 1989 · N28565 · Substantial damage
  > The fatigue failure of an exhaust valve due to excessive wear of the respective valve guide. Factors related to the accident were: the fence & cars in the emergency landing area.
- [NTSB FTW89LA144](https://openairdocs.org/ntsb/FTW89LA144.md): Cessna 172G · Mckinney, TX · Accident · No injuries · Limited investigation · Final report · Aug 5, 1989 · N4377L · Substantial damage
  > Total failure of the engine assembly/rocker arm/tappet shaft.
- [NTSB CHI89DEX06](https://openairdocs.org/ntsb/CHI89DEX06.md): Grumman G-164A · Sullivan, IN · Accident · No injuries · Final report · Aug 2, 1989 · N952X · Substantial damage
  > A failure of the supercharger oil seal which resulted in a partial loss of engine power during takeoff and the uncontrolled touchdown during the forced landing. Factors related to the accident were: partial failure of the supercharger and spark plub fowling.
- [NTSB ATL89FA188](https://openairdocs.org/ntsb/ATL89FA188.md): Beech 70 · Albany, GA · Accident · 6 fatal · Field investigation · Final report · Aug 2, 1989 · N11TP · Destroyed
  > The fatigue failure of the supercharger intermediate drive gear shaft (gear tooth), which resulted in a partial loss of power, and the pilot's initiation of lift-off before reaching VMC airspeed. Factors related to the accident were: the worn intermediate…
- [NTSB CHI89LA146](https://openairdocs.org/ntsb/CHI89LA146.md): Piper PA-32R-300 · Nappanee, IN · Accident · No injuries · Limited investigation · Final report · Jul 27, 1989 · N3923F · Substantial damage
  > The pilot-in-command's improper preflight calculation of weight and balance and the aircraft's inadequate climb capability due to low compression.
- [NTSB FTW89DRA08](https://openairdocs.org/ntsb/FTW89DRA08.md): Grumman-Schweizer G-164B · Anahuac, TX · Accident · Minor injuries · Final report · Jul 18, 1989 · N6633Q · Destroyed
  > Failure of the supercharger bearing. The dirt bank was a contributing factor.
- [NTSB ATL89LA178](https://openairdocs.org/ntsb/ATL89LA178.md): Piper PA-32RT-300T · Columbus, OH · Accident · No injuries · Limited investigation · Final report · Jul 12, 1989 · N2153K · Substantial damage
  > The improper installation of the propeller governor idler-gear shaft retaining set-screw, which led to an engine oil leak and resulted in a loss of engine power; and the reduction of the pilot's ability to see outside the airplane due to oil on the windshield.
- [NTSB MIA89LA188](https://openairdocs.org/ntsb/MIA89LA188.md): Cessna 182 · Kissimmee, FL · Accident · Minor injuries · Limited investigation · Final report · Jul 9, 1989 · N6199B · Substantial damage
  > The failure of the carburetor throttle cable because of an inadequate annual inspection conducted 4.6 flight hours and one month before the accident.
- [NTSB LAX89LA236](https://openairdocs.org/ntsb/LAX89LA236.md): Cessna 150M · Venice, CA · Accident · No injuries · Limited investigation · Final report · Jul 7, 1989 · N704YY · Substantial damage
  > The improper installation and inspection of the carburetor throttle linkage arm.
- [NTSB LAX89DVG07](https://openairdocs.org/ntsb/LAX89DVG07.md): Schweizer G-164B · Willows, CA · Accident · No injuries · Final report · Jul 4, 1989 · N3627G · Substantial damage
  > Failure of the connecting rod on #1 cylinder of the aircraft powerplant.
- [NTSB MKC89LA142](https://openairdocs.org/ntsb/MKC89LA142.md): Grumman-Schweizer G-164A · Waldenburg, AR · Accident · No injuries · Limited investigation · Final report · Jun 23, 1989 · N9725 · Substantial damage
  > The total failure of the engine supercharger which resulted in a loss of engine power.
- [NTSB FTW89DRD09](https://openairdocs.org/ntsb/FTW89DRD09.md): Schweizer G-164A · Bunkie, LA · Accident · No injuries · Final report · Jun 23, 1989 · N602Y · Substantial damage
  > The loss of the number five cylinder in flight, resulting in a loss of engine RPM. The pilot misjudged the landing flare height due to obscured vision from fire and smoke and the airplane stalled and impacted the ground nose first.
- [NTSB FTW89LA114](https://openairdocs.org/ntsb/FTW89LA114.md): Cessna 150J · Minden, LA · Accident · No injuries · Limited investigation · Final report · Jun 20, 1989 · N60625 · Destroyed
  > The loss of engine power due to improper maintenance performed during an annual inspection 1.6 flying hours prior to the accident which resulted in the mixture control becoming disconnected.
- [NTSB LAX89LA221](https://openairdocs.org/ntsb/LAX89LA221.md): Cessna 172E · Grass Valley, CA · Accident · No injuries · Limited investigation · Final report · Jun 18, 1989 · N3618S · Substantial damage
  > Failure to perform maintenance inspections prescribed by the magneto, engine and aircraft manufacturers. The high density altitude and terrain conditions were contributing factors.
- [NTSB CHI89DEK01](https://openairdocs.org/ntsb/CHI89DEK01.md): Piper PA-28 · Albany, OH · Accident · Serious injuries · Final report · Jun 18, 1989 · N40973 · Substantial damage
  > Seizure of the #4 exhaust valve and bending of its respective push rod, which resulted in a significant loss of engine power. Contributing factors were: lack of a suitable emergency landing area, trees, and the fence.
- [NTSB LAX89LA217](https://openairdocs.org/ntsb/LAX89LA217.md): Cessna 421 · Picacho, AZ · Accident · Minor injuries · Limited investigation · Final report · Jun 17, 1989 · N421S · Destroyed
  > Failure of the number three exhaust valve on the left engine. A major factor was the high density altitude where the airplane would not operate on single engine.
- [NTSB ATL89LA162](https://openairdocs.org/ntsb/ATL89LA162.md): Cessna 150M · Knoxville, TN · Accident · Minor injuries · Limited investigation · Final report · Jun 17, 1989 · N714SR · Substantial damage
  > The pilot's failure to recognize that the engine was not developing full power and the delay in performing remedial action until it was too late to stop the airplane on the runway.
- [NTSB ATL89FA163](https://openairdocs.org/ntsb/ATL89FA163.md): Cessna 172F · Vernon, AL · Accident · 1 fatal · Field investigation · Final report · Jun 17, 1989 · N7939U · Substantial damage
  > Improper maintenance of the spark plugs by the pilot/mechanic which resulted in a partial loss of engine power, and the pilot's failure to clear trees during an emergency landing in an open field resulting in an inadvertent stall.
- [NTSB CHI89FA109](https://openairdocs.org/ntsb/CHI89FA109.md): Piper PA-28R-200 · Saint Charles, IL · Accident · No injuries · Field investigation · Final report · Jun 16, 1989 · N5242T · Substantial damage
  > The failure of the mechanic to properly inspect the alternate air door during annual inspection. This failure led to air starvation, loss of power, and a forced landing by the pilot onto rough terrain.
- [NTSB ATL89LA159](https://openairdocs.org/ntsb/ATL89LA159.md): Cessna 152 · Jackson, TN · Accident · No injuries · Limited investigation · Final report · Jun 13, 1989 · N24451 · Substantial damage
  > The separation of the mixture cable from the carburetor. Contributing factor(s) was: inadequate maintenance and inspection of the airplane and the soft terrain encountered during the forced landing.
- [NTSB FTW89FA107](https://openairdocs.org/ntsb/FTW89FA107.md): Pitts S-1S · Henryetta, OK · Accident · Serious injuries · Field investigation · Final report · Jun 2, 1989 · N64652 · Destroyed
  > An engine power loss due to the separation and departure of an exhaust stack. The stack failed due to poor weld. Factor(s) was: the terrain conditions of the selected forced landing site.
- [NTSB SEA89LA093](https://openairdocs.org/ntsb/SEA89LA093.md): Piper PA-22-150 · Black Diamond, WA · Accident · No injuries · Limited investigation · Final report · May 28, 1989 · N6121D · Substantial damage
  > Power loss due to magneto failure. Contributing to the accident were lack of suitable terrain for forced landing and the presence of obstacles.
- [NTSB LAX89LA197](https://openairdocs.org/ntsb/LAX89LA197.md): Aerospatiale AS350D · Waialae Falls, HI · Accident · Minor injuries · Limited investigation · Final report · May 21, 1989 · N6003S · Substantial damage
  > Improper maintenance/adjustment of the engine fuel control unit by company maintenance personnel, which resulted in a slight loss of engine power, and failure of the pilot to maintain rotor RPM, while turning and taking off from a hover with a relatively…
- [NTSB DEN89LA122](https://openairdocs.org/ntsb/DEN89LA122.md): Cessna 175 · Sheridan, WY · Accident · No injuries · Limited investigation · Final report · May 21, 1989 · N7557M · Substantial damage
  > Binding (stuck) #4 exhaust valve. High vegetation (hay) and a hidden obstruction (ditch) were contributing factors.
- [NTSB FTW89LA097](https://openairdocs.org/ntsb/FTW89LA097.md): Piper PA-24-250 · Decatur, TX · Accident · No injuries · Limited investigation · Final report · May 20, 1989 · N5874P · Substantial damage
  > Inadequate inspection of the exhaust system by the maintenance personnel during the latest annual inspection.
- [NTSB ATL89LA146](https://openairdocs.org/ntsb/ATL89LA146.md): Ercoupe 415-C · Troy, NC · Accident · 1 fatal · Limited investigation · Final report · May 13, 1989 · N99766 · Destroyed
  > An undetermined powerplant problem, which resulted in a loss of engine power, and the pilot/mechanic's failure to assure the aircraft was properly inspected before flight. Factors related to the accident were: the pilot's delay in making a precautionary…
- [NTSB MIA89LA136](https://openairdocs.org/ntsb/MIA89LA136.md): Cessna 152 · Miami, FL · Accident · No injuries · Limited investigation · Final report · Apr 23, 1989 · N704XE · Substantial damage
  > Failure of a rocker shaft boss on the number three cylinder. A related factor was the rough terrain in the emergency landing area.
- [NTSB SEA89LA073](https://openairdocs.org/ntsb/SEA89LA073.md): Donner/Parton Avid Flyer · Stanwood, WA · Accident · No injuries · Limited investigation · Final report · Apr 20, 1989 · N4409D · Substantial damage
  > An ignition lead became disconnected from one cylinder, which resulted in a partial power loss. A factor related to the accident was: soft terrain in the touchdown area.
- [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 MIA89LA127](https://openairdocs.org/ntsb/MIA89LA127.md): Air Tractor AT-301 · Fort Pierce, FL · Accident · No injuries · Limited investigation · Final report · Apr 13, 1989 · N3159D · Substantial damage
  > Failure of the number five cylinder. Factors related to the accident were: the proximity of homes in the area, which precluded jettisoning of the chemical load, and high vegetation in the emergency landing area.
- [NTSB FTW89DPJ03](https://openairdocs.org/ntsb/FTW89DPJ03.md): Air Tractor 301 · Jefferson, OK · Accident · No injuries · Final report · Apr 7, 1989 · N4369S · Substantial damage
  > Loss of engine power, due to a cracked number 4 cylinder. A factor related to the accident was: the terrace (dirt bank) in the emergency landing area.
- [NTSB CHI89DEP02](https://openairdocs.org/ntsb/CHI89DEP02.md): Cessna 172M · West Bend, WI · Accident · No injuries · Final report · Mar 27, 1989 · N9578V · Substantial damage
  > Partial failure of the throttle cable. Unsuitable (soft) terrain and transmission wires in the landing area were considered to be factors.
- [NTSB MKC89LA086](https://openairdocs.org/ntsb/MKC89LA086.md): Cessna 150 · Papillion, NE · Accident · Serious injuries · Limited investigation · Final report · Mar 26, 1989 · N3832J · Substantial damage
  > The contamination of the fuel screen by foreign matter and operation of the aircraft with known deficiencies.
- [NTSB SEA89LA059](https://openairdocs.org/ntsb/SEA89LA059.md): Grumman-Schweizer G-164A · Rosalia, WA · Accident · No injuries · Limited investigation · Final report · Mar 25, 1989 · N8792H · Substantial damage
  > A loss of engine power due to a supercharger failure. Contributing to the accident was the soft terrain on which the forced landing was made.

Next page: https://openairdocs.org/ntsb.md?occurrence=352&page=18

## 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=17

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