# 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 15 of 29 · 1,408 cases

## Cases, newest first

- [NTSB FTW91DRA02](https://openairdocs.org/ntsb/FTW91DRA02.md): W. R. Mathis Midget Mustang · Nacogdoches, TX · Accident · Serious injuries · Final report · May 4, 1991 · N43WM · Substantial damage
  > Power loss due to engine starter failure for undetermined reasons.
- [NTSB DEN91LA066](https://openairdocs.org/ntsb/DEN91LA066.md): Cessna 421 · Englewood, CO · Accident · Minor injuries · Limited investigation · Final report · May 1, 1991 · N18DF · Substantial damage
  > Power loss on both engines as a result of exhaust system failure.
- [NTSB LAX91LA188](https://openairdocs.org/ntsb/LAX91LA188.md): Enstrom F28C · Palm Springs, CA · Accident · Serious injuries · Limited investigation · Final report · Apr 29, 1991 · N214MM · Substantial damage
  > Inadequate inspection of the fuel system resulting in an engine power loss and inflight fire due to a loose fuel connection.
- [NTSB NYC91DNA02](https://openairdocs.org/ntsb/NYC91DNA02.md): Bell 47-G3B1 · Harwich, MA · Accident · Minor injuries · Final report · Apr 20, 1991 · N1166W · Substantial damage
  > A failure of the clutch during takeoff due to improper maintenance procedures. Factors related to the accident were insufficient altitude to establish an autorotation.
- [NTSB CHI91DCG02](https://openairdocs.org/ntsb/CHI91DCG02.md): Huff Pulsar · Missouri City, MO · Accident · Serious injuries · Final report · Apr 17, 1991 · N89PB · Substantial damage
  > Oil fouled spark plugs resulting in a partial loss of engine power. Soft terrain in the forced landing area was a factor.
- [NTSB NYC91LA104](https://openairdocs.org/ntsb/NYC91LA104.md): Piper J-4A · Mahopac, NY · Accident · Minor injuries · Limited investigation · Final report · Apr 7, 1991 · N23179 · Substantial damage
  > The erratic performance of the left magneto resulting in inadequate climb capabilities and in flight collision with terrain.
- [NTSB FTW91DPG03](https://openairdocs.org/ntsb/FTW91DPG03.md): Grumman G-164A · Earle, AR · Accident · No injuries · Final report · Apr 2, 1991 · N5336 · Substantial damage
  > A power loss for undetrmined reasons. A factor was the muddy/soft terrain in which the forced landing was performed.
- [NTSB NYC91LA094](https://openairdocs.org/ntsb/NYC91LA094.md): Cessna T210N · Milleville, NJ · Accident · Minor injuries · Limited investigation · Final report · Mar 25, 1991 · N6237Y · Substantial damage
  > The total loss of engine power caused by mechanical failure, which resulted in the pilot landing the airplane on unsuitable terrain.
- [NTSB FTW91LA056](https://openairdocs.org/ntsb/FTW91LA056.md): Cessna 150F · Floresville, TX · Accident · Minor injuries · Limited investigation · Final report · Mar 24, 1991 · N383VU · Substantial damage
  > The failure of the engine due to a jammed valve, incorrect maintenance procedures, and the pilot's improper compensation for the existing wind conditions. A factor was the tailwind.
- [NTSB BFO91LA033](https://openairdocs.org/ntsb/BFO91LA033.md): Cessna 172 · Hagerstown, MD · Accident · No injuries · Limited investigation · Final report · Mar 22, 1991 · N5241D · Substantial damage
  > Worn camshaft lobes which resulted in the loss of engine power.
- [NTSB DEN91LA053](https://openairdocs.org/ntsb/DEN91LA053.md): Rockwell 112B · Nederland, CO · Accident · Serious injuries · Limited investigation · Final report · Mar 18, 1991 · N1241J · Substantial damage
  > Deteriorated ignition harness and ignition lead arcing. Factors were the high density altitude and lack of suitable terrain for the forced landing.
- [NTSB SEA91LA067](https://openairdocs.org/ntsb/SEA91LA067.md): Clyde L. King Osprey II · Aurora, OR · Accident · No injuries · Limited investigation · Final report · Mar 16, 1991 · N69CK · Substantial damage
  > A loss of engine power due to fuel starvation because of an inadequate component and inadequate fuel system design.
- [NTSB LAX91LA129](https://openairdocs.org/ntsb/LAX91LA129.md): Cessna 421B · Tucson, AZ · Accident · Serious injuries · Limited investigation · Final report · Mar 12, 1991 · N924MD · Substantial damage
  > The fatigue failure of the right engine turbo exhaust clamp, and, the failure of the flying pilot to complete the single engine emergency procedures in a timely manner. A factor in the accident was the failure of the pilot in command to adequately supervise…
- [NTSB BFO91LA030](https://openairdocs.org/ntsb/BFO91LA030.md): Piper PA-24-250 · Hagerstown, MD · Accident · Serious injuries · Limited investigation · Final report · Mar 7, 1991 · N6699P · Substantial damage
  > The failure of the throttle control cable. A factor ws the rough terrain.
- [NTSB ANC91LA026](https://openairdocs.org/ntsb/ANC91LA026.md): MBB BO-105-CBS-4 · Valdez, AK · Accident · Minor injuries · Limited investigation · Final report · Feb 10, 1991 · N5413D · Substantial damage
  > Was the pilot-in-command's failure to properly use the approval checklist, improper procedures and directives.
- [NTSB ATL91IA050](https://openairdocs.org/ntsb/ATL91IA050.md): Piper PA-60-600 · Cochran, GA · Incident · No injuries · Incident investigation · Final report · Feb 5, 1991 · N6070D · Minor damage
  > Failure of the right engine shutoff valve which resulted in a complete loss of engine power. The airplane veered off the right side of the runway and the right main landing gear collapsed as a result of the pilots failure to maintain directional control…
- [NTSB ATL91LA049](https://openairdocs.org/ntsb/ATL91LA049.md): Beech V35B · Advance, NC · Accident · No injuries · Limited investigation · Final report · Feb 2, 1991 · N74LE · Substantial damage
  > The pilot's diverted attention and failure to maintain directional control during the takeoff. A factor was the malfunctioning magneto which resulted in the engine sputter.
- [NTSB LAX91LA085](https://openairdocs.org/ntsb/LAX91LA085.md): Piper PA 32-300 · Anaheim, CA · Accident · Minor injuries · Limited investigation · Final report · Jan 21, 1991 · N1885H · Substantial damage
  > Maintenance personnel in that they improperly adjusted the left magneto which resulted in the complete erosion of the electrodes from six of the twelve installed spark plugs. The installation of spark plugs with colder heat ranges than specified by the…
- [NTSB MIA91IA061](https://openairdocs.org/ntsb/MIA91IA061.md): Cessna 210M · Lutz, FL · Incident · No injuries · Incident investigation · Final report · Jan 5, 1991 · N823AR · Minor damage
  > Fuel line chafing, and in-flight fire caused by shorting of the electrical system which resulted in a forced landing with the landing gear not extended.
- [NTSB FTW91FA025](https://openairdocs.org/ntsb/FTW91FA025.md): Piper PA28-181 · Olla, LA · Accident · 1 fatal · Field investigation · Final report · Dec 16, 1990 · N8460Q · Destroyed
  > The collapsed carburetor float and restricted movement of the fuel metering needle. Factors were the darknight, the unsuitable terrain, and the operator's maintenance personnel failure to inspect (repair) the engine.
- [NTSB DEN91LA025](https://openairdocs.org/ntsb/DEN91LA025.md): Grumman AA1B · Roswell, NM · Accident · No injuries · Limited investigation · Final report · Dec 15, 1990 · N1638R · Substantial damage
  > Low cylinder compression and fouled spark plug.
- [NTSB MIA91LA043](https://openairdocs.org/ntsb/MIA91LA043.md): Piper PA-28-151 · Jupiter, FL · Accident · No injuries · Limited investigation · Final report · Dec 12, 1990 · N4480F · Substantial damage
  > Partial loss of engine power due to failure of an exhaust valve, due to a valve guide that was worn beyond specifications.
- [NTSB LAX91FA052](https://openairdocs.org/ntsb/LAX91FA052.md): de Havilland DHC-6-100 · Perris Valley, CA · Accident · Minor injuries · Field investigation · Final report · Dec 9, 1990 · N121PM · Substantial damage
  > A loss of power on the left engine due to a fatigue failure of a compressor turbine blade leading to further compressor blade damage; a worn power turbine governor throttle cam assembly which led to loss of power on the right engine; and inadequate…
- [NTSB NYC91LA044](https://openairdocs.org/ntsb/NYC91LA044.md): Piper PA-28-161 · Atlantic City, NJ · Accident · No injuries · Limited investigation · Final report · Dec 7, 1990 · N8339D · Substantial damage
  > The failure of the pilot to abort the takeoff in sufficient time to prevent an overrun. Factors related to the accident were a partial power loss due to a faulty ignition system.
- [NTSB LAX91LA033](https://openairdocs.org/ntsb/LAX91LA033.md): Mooney M20E · Tuba City, AZ · Accident · Minor injuries · Limited investigation · Final report · Nov 17, 1990 · N5703Q · Substantial damage
  > Failure of the piston rings which reduced the available engine power, and the pilot's continued operation of his airplane with a known engine deficiency during the relatively high density altitude conditions.
- [NTSB NYC91DNE01](https://openairdocs.org/ntsb/NYC91DNE01.md): Craig A. Gordon Teenie TWO · Oxford, CT · Accident · No injuries · Final report · Nov 16, 1990 · N199MG · Substantial damage
  > The failure of the pilot to maintain airspeed which resulted in an inadvertent stall and hard landing. Factors related to the accident were: the power loss and improper maintenance on the engine.
- [NTSB LAX91DUJ03](https://openairdocs.org/ntsb/LAX91DUJ03.md): Air Tractor AT-302 · Somerton, AZ · Accident · No injuries · Final report · Nov 16, 1990 · N4441S · Substantial damage
  > The failure of the number 3 exhaust valve which led to an engine failure and subsequent crash landing.
- [NTSB MIA91FA020](https://openairdocs.org/ntsb/MIA91FA020.md): Aero Commander 680V · Fort Lauderdale, FL · Accident · 2 fatal · Field investigation · Final report · Nov 3, 1990 · N541F · Destroyed
  > The pilot-in-command's decision to continue takeoff with a known deficiency in the airplane - low power on both engines which resulted from open compressor surge valves. The pilot subsequently failed to maintain airspeed while maneuvering in a turn resulting…
- [NTSB MIA91FA017](https://openairdocs.org/ntsb/MIA91FA017.md): Cessna 150G · Marathon, FL · Accident · 1 fatal · Field investigation · Final report · Oct 30, 1990 · N3220J · Destroyed
  > The pilot-in-command's failure to maintain airspeed, while attempting to make a forced landing following a partial loss of engine power. Fatigue failure of the center rocker boss on the #3 cylinder was a related factor.
- [NTSB MIA91LA010](https://openairdocs.org/ntsb/MIA91LA010.md): American AA-5 · Cape Coral, FL · Accident · No injuries · Limited investigation · Final report · Oct 14, 1990 · N5825L · Substantial damage
  > A partial loss of engine power, caused by mechanical failure of the number 3 cylinder engine exhaust valve, for an undetermined reason.
- [NTSB NYC91FA006](https://openairdocs.org/ntsb/NYC91FA006.md): Cessna 152 · Griswold, CT · Accident · 2 fatal · Field investigation · Final report · Oct 8, 1990 · N4708M · Destroyed
  > A broken ehaust valve spring that resulted in a partial loss of power. Factors related to the accident were: darkness, lack of suitable terrain, and failure of the occupants to use their shoulder harnesses.
- [NTSB MIA91FA008](https://openairdocs.org/ntsb/MIA91FA008.md): Mooney M20C · Kissimmee, FL · Accident · Serious injuries · Field investigation · Final report · Oct 7, 1990 · N1389W · Substantial damage
  > Malfunction of both magnetos due to deterioration of the coils, failure of maintenance personnel to comply with an airworthiness directive, and failure of the pilot to maintain adequate visual lookout while on an approach for an emergency landing. Factors…
- [NTSB FTW91FA002](https://openairdocs.org/ntsb/FTW91FA002.md): Enstrom F28-C · Mesquite, TX · Accident · 1 fatal · Field investigation · Final report · Oct 7, 1990 · N88RA · Destroyed
  > Installation error of company maintenance personnel. Factors were the unsuitable terrain, the tailwind, the inability of the pilot to maintain main rotor RPM, and the inadequate annual inspection by company maintenance personnel.
- [NTSB NYC91LA003](https://openairdocs.org/ntsb/NYC91LA003.md): Cessna A150M · Lincoln, RI · Accident · No injuries · Limited investigation · Final report · Oct 5, 1990 · N7922U · Substantial damage
  > On ground collision with a tree while making a forced landing following loss of engine power due to a failed exhaust valve.
- [NTSB MIA91LA006](https://openairdocs.org/ntsb/MIA91LA006.md): Cessna 150M · Tampa, FL · Accident · No injuries · Limited investigation · Final report · Oct 5, 1990 · N704BB · Substantial damage
  > The pilot's decision to fly an airplane with known deficiencies. This resulted in a partial loss of engine power, and a ground collision with a fixed object.
- [NTSB SEA90FA197](https://openairdocs.org/ntsb/SEA90FA197.md): Piper PA-24-260 · Bend, OR · Accident · 2 fatal · Field investigation · Final report · Sep 28, 1990 · N8646P · Destroyed
  > An engine power loss due to fuel starvation as a result of a broken seal in the fuel injector servo. In addition, the pilot misjudged his approach into an open field.
- [NTSB NYC90LA228](https://openairdocs.org/ntsb/NYC90LA228.md): Piper PA-12 · Franconia, NH · Accident · Minor injuries · Limited investigation · Final report · Sep 23, 1990 · N2770M · Substantial damage
  > The landing of the airplane in unsuitable terrain, due to the mechanical failure of the engine center muffler baffle, which blocked the exhaust flow, resulting in a loss of power.
- [NTSB ATL90LA174](https://openairdocs.org/ntsb/ATL90LA174.md): Piper PA-28-151 · Palmetto, GA · Accident · Minor injuries · Limited investigation · Final report · Sep 22, 1990 · N44678 · Substantial damage
  > The number two cylinder exhaust valve sticking in the closed position, which resulted in a partial power loss during the takeoff. A factor in the accident was the pilot's improper preflight inspection, in that he did not correctly analyze the engine problem…
- [NTSB CHI90LA267](https://openairdocs.org/ntsb/CHI90LA267.md): Cessna 182 · Troy, MI · Accident · No injuries · Limited investigation · Final report · Sep 16, 1990 · N6873M · Substantial damage
  > A loss of engine power due to failure of the rocker arm bosses on the #2 cylinder.
- [NTSB MIA90LA182](https://openairdocs.org/ntsb/MIA90LA182.md): Hiller OH-23C · Fort Pierce, FL · Accident · No injuries · Limited investigation · Final report · Sep 11, 1990 · N96168 · Substantial damage
  > Loss of engine power due to separation of the packing seal which seals the distribution zone pipe to the inlet manifold, for undetermined reasons resulting in a hard landing.
- [NTSB FTW90FA177](https://openairdocs.org/ntsb/FTW90FA177.md): Piper PA-32RT-300T · Addison, TX · Accident · Serious injuries · Field investigation · Final report · Sep 10, 1990 · N36720 · Destroyed
  > Fatigue failure of the throttle cable. Factors related to the accident were: darkness and objects (fence and utility poles) in the emergency landing area.
- [NTSB LAX90FA311](https://openairdocs.org/ntsb/LAX90FA311.md): Cessna 411 · Fallon, NV · Accident · 1 fatal · Field investigation · Final report · Sep 3, 1990 · N7321U · Destroyed
  > Failure of the pilot to perform emergency procedures for loss of engine power (including his failure to feather the propeller of the affected engine). Factors related to the accident were: inadequate maintenance, contamination in the fuel system, and overheat…
- [NTSB FTW90DPG13](https://openairdocs.org/ntsb/FTW90DPG13.md): Grumman G-164A · Luxora, AR · Accident · No injuries · Final report · Aug 30, 1990 · N5213 · Substantial damage
  > A partial power loss due to failure of the number five connecting rod. A factor was the soft terrain in which the forced landing was made.
- [NTSB LAX90DVD03](https://openairdocs.org/ntsb/LAX90DVD03.md): Texas Helicopter M47A Wasp · Stockton, CA · Accident · No injuries · Final report · Aug 27, 1990 · N43921 · Substantial damage
  > The pilot misjudged the altitude during the flare/touchdown phase of the autorotation. Factors relating to this accident are failure of the right magneto.
- [NTSB ATL90LA161](https://openairdocs.org/ntsb/ATL90LA161.md): Cessna 172 · Palmetto, GA · Accident · Minor injuries · Limited investigation · Final report · Aug 24, 1990 · N6173E · Substantial damage
  > The pilot's operation of the airplane with known mechanical deficiencies. A factor in the accident was the improperly maintained condition of the magnetos.
- [NTSB FTW90MA161](https://openairdocs.org/ntsb/FTW90MA161.md): Grumman G-159 · Houston, TX · Accident · 3 fatal · Major investigation · Final report · Aug 23, 1990 · N80RD · Destroyed
  > Partial failure of the left engine fuel pump, which resulted in a partial loss of power in the left engine, but not enough of a power loss to trigger and/or complete the autofeathering operation of the left propeller, thus allowing insufficient time for the…
- [NTSB CHI90FA233](https://openairdocs.org/ntsb/CHI90FA233.md): Piper PA-23-160 · Odell, IL · Accident · No injuries · Field investigation · Final report · Aug 16, 1990 · N4231P · Substantial damage
  > A loss of left engine power due to oil accumulation in the right magneto and a non-usable spark lead from the left magneto. In addition, the right engine was unable to provide adequate power to maintain altitude due to a partial blockage in the carburetor by…
- [NTSB ATL90LA159](https://openairdocs.org/ntsb/ATL90LA159.md): Cessna 172 · Ridge Spring, SC · Accident · No injuries · Limited investigation · Final report · Aug 13, 1990 · N66068 · Substantial damage
  > The failure of the maintenance facility/owner to follow standard preventive maintenance procedures. A factor was the pilot's failure to extend the flaps during the forced landing.
- [NTSB LAX90DVD01](https://openairdocs.org/ntsb/LAX90DVD01.md): Convair L-13A · Hayward, CA · Accident · Serious injuries · Final report · Aug 9, 1990 · N13NH · Destroyed
  > Absence of a oil system fitting cap.
- [NTSB ATL90LA155](https://openairdocs.org/ntsb/ATL90LA155.md): Cessna 172L · Greensboro, AL · Accident · No injuries · Limited investigation · Final report · Aug 4, 1990 · N4386Q · Substantial damage
  > The pilot's failure to maintain proper airspeed and attain the proper touchdown point during the emergency landing.

Next page: https://openairdocs.org/ntsb.md?occurrence=352&page=16

## 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=15

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