# 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 1 of 29 · 1,408 cases

## Latest cases

- [NTSB LAX08LA025](https://openairdocs.org/ntsb/LAX08LA025.md): Interplane XJ · Independence, OR · Accident · Serious injuries · Limited investigation · Final report · Nov 2, 2007 · N232PM · Substantial damage
  > A partial loss of engine power for undetermined reasons. Also causal was the pilot's failure to maintain adequate airspeed, which resulted in a spin and collision with terrain
- [NTSB DEN08LA014](https://openairdocs.org/ntsb/DEN08LA014.md): Cessna 210 · Canon City, CO · Accident · No injuries · Limited investigation · Final report · Oct 17, 2007 · N215MD · Substantial damage
  > The failure of the engine throttle cable resulting in a lack of engine power when commanded.
- [NTSB NYC08FA012](https://openairdocs.org/ntsb/NYC08FA012.md): Aero Commander 560-F · Wiley Ford, WV · Accident · 4 fatal · Field investigation · Final report · Oct 14, 2007 · N6370U · Destroyed
  > A partial power loss in the right engine due to the failure of the number one exhaust valve, and the airplane's inability to maintain a climb on one engine for unknown reasons. Contributing to the accident were fog and rising terrain. [This report was…
- [NTSB LAX08LA009](https://openairdocs.org/ntsb/LAX08LA009.md): Cessna 172L · Prescott, AZ · Accident · Minor injuries · Limited investigation · Final report · Oct 10, 2007 · N9897G · Substantial damage
  > The failure of maintenance personnel to detect fatigue cracks in the number 3 exhaust rocker arm, which lead to a partial loss of engine power.
- [NTSB CHI08CA015](https://openairdocs.org/ntsb/CHI08CA015.md): Cessna 150H · Clarksville, AR · Accident · Minor injuries · Data collection · Final report · Oct 5, 2007 · N22899 · Substantial damage
  > Failure of the flight instructor to identify the lack of airplane performance in a timely manner and to reject the takeoff. An additional cause was the partial loss of engine power for undetermined reasons. A contributing factor was the presence of the power…
- [NTSB SEA08LA001](https://openairdocs.org/ntsb/SEA08LA001.md): Cessna 172N · Green Valley, AZ · Accident · No injuries · Limited investigation · Final report · Oct 2, 2007 · N6291D · Substantial damage
  > The loss of engine power due to the separation of the number three cylinder exhaust rocker arm.
- [NTSB ATL07LA131](https://openairdocs.org/ntsb/ATL07LA131.md): Grumman G-164A · Pittsgrove, NJ · Accident · No injuries · Limited investigation · Final report · Sep 29, 2007 · N8761H · Substantial damage
  > A partial loss of engine power due to low compression for undetermined reasons.
- [NTSB NYC07CA230](https://openairdocs.org/ntsb/NYC07CA230.md): Grenier Kitfox IV · Moultonboro, NH · Accident · No injuries · Data collection · Final report · Sep 16, 2007 · N20577 · Substantial damage
  > The failure of both spark plugs in the number 3 cylinder which resulted in a partial loss of engine power.
- [NTSB NYC07LA221](https://openairdocs.org/ntsb/NYC07LA221.md): Piper PA-23-250 · Bernardsville, NJ · Accident · No injuries · Limited investigation · Final report · Sep 6, 2007 · N62BA · Substantial damage
  > The failure by unidentified maintenance personnel to follow appropriate procedures when attaching the No. 3 cylinder, which was replaced subsequent to the engine overhaul and not entered in the logbook, resulting in fatigue failures of the cylinder studs.
- [NTSB DEN07LA149](https://openairdocs.org/ntsb/DEN07LA149.md): Piper PA-31P · Newton, KS · Accident · No injuries · Limited investigation · Final report · Aug 28, 2007 · N7325L · Substantial damage
  > The failure of the exhaust gasket on the number 6 cylinder for undetermined reasons. A contributing factor was the lack of suitable terrain for the forced landing.
- [NTSB DEN07LA138](https://openairdocs.org/ntsb/DEN07LA138.md): Air Tractor AT-301 · Alamosa, CO · Accident · Minor injuries · Limited investigation · Final report · Aug 18, 2007 · N69WN · Substantial damage
  > The failure of the number one cylinder due to fatigue. Contributing to the accident was the pilot's diminished visual lookout due to the oil covered windscreen.
- [NTSB ENG07IA034](https://openairdocs.org/ntsb/ENG07IA034.md): Learjet · Salt Lake City, UT · Incident · No injuries · Incident investigation · Final report · Aug 12, 2007 · N244F · No damage
  > The fatigue fracture of the fan blade due to the blade vendor's improper setup of the forging dies, which resulted in fan blades with airfoils that were below the minimum thickness in the highest stressed area of the airfoil and resulted in operating stresses…
- [NTSB MIA07LA132](https://openairdocs.org/ntsb/MIA07LA132.md): Roger A Dalke E.B. Jenny · Wakefield, VA · Accident · Minor injuries · Limited investigation · Final report · Aug 11, 2007 · N59486 · Substantial damage
  > The pilot/owner's inadequate maintenance which resulted in a radiator leak, a loss of engine coolant, the engine overheating, and partial loss of engine power.
- [NTSB CHI07LA240](https://openairdocs.org/ntsb/CHI07LA240.md): Aircoupe F-1A · Greenwood, IL · Accident · No injuries · Limited investigation · Final report · Jul 30, 2007 · N3041G · Substantial damage
  > The loss of engine power due to carburetor icing, which resulted in the pilot having to perform a forced landing to unsuitable terrain. Factors contributing to the accident were the carburetor icing conditions and the broken carbuerator heat lever.
- [NTSB DFW07LA165](https://openairdocs.org/ntsb/DFW07LA165.md): Air Tractor AT-502 · Slaton, TX · Accident · No injuries · Limited investigation · Final report · Jul 20, 2007 · N15400 · Substantial damage
  > An uncontained failure of the turbine engine's power section for undetermined reasons.
- [NTSB DEN07LA124](https://openairdocs.org/ntsb/DEN07LA124.md): Cessna A185F · Englewood, CO · Accident · No injuries · Limited investigation · Final report · Jul 20, 2007 · N78011 · Substantial damage
  > This case was revised 10/31/2007. Low compression in number 2 cylinder, which reduced the airplane's climb capability. Contributing factors in this accident were the high density altitude conditions, and the tree.
- [NTSB SEA07IA201](https://openairdocs.org/ntsb/SEA07IA201.md): Cirrus Design SR22 · Reno, NV · Incident · No injuries · Incident investigation · Final report · Jul 15, 2007 · N254SR · No damage
  > The failure of the left turbocharger as a result of a production defect in the unit's compressor due to a machining process change by the manufacturer that was made without formal documentation or substantiation.
- [NTSB ANC07LA058](https://openairdocs.org/ntsb/ANC07LA058.md): Cessna 150 · Fairbanks, AK · Accident · Minor injuries · Limited investigation · Final report · Jun 28, 2007 · N66655 · Substantial damage
  > A partial loss of engine power due to a stuck engine exhaust valve during takeoff initial climb. A contributing factor was the airplane's excessive gross weight.
- [NTSB ANC07LA056](https://openairdocs.org/ntsb/ANC07LA056.md): Piper PA-12 · Anchorage, AK · Accident · No injuries · Limited investigation · Final report · Jun 27, 2007 · N78456 · Substantial damage
  > The malfunction of an engine magneto during cruise flight, which resulted in a partial loss of engine power, and an on-ground encounter with terrain. A factor associated with the accident was the high vegetation at the off-airport landing site.
- [NTSB MIA07LA111](https://openairdocs.org/ntsb/MIA07LA111.md): Beech A36 · Cullman, AL · Accident · Serious injuries · Limited investigation · Final report · Jun 22, 2007 · N18491 · Substantial damage
  > The pilot’s mismanagement of an in-flight emergency, which resulted in a gear-up landing and runway overrun. Contributing to the accident was a breach to the engine crankcase above and in line with the No. 1 cylinder.
- [NTSB ATL07LA092](https://openairdocs.org/ntsb/ATL07LA092.md): Cessna 172 · Brinson, GA · Accident · No injuries · Limited investigation · Final report · Jun 19, 2007 · N921JR · Substantial damage
  > A partial loss of engine power due to a blocked carburetor jet.
- [NTSB SEA07LA170](https://openairdocs.org/ntsb/SEA07LA170.md): Piper PA-28-161 · Redlands, CA · Accident · No injuries · Limited investigation · Final report · Jun 10, 2007 · N130RJ · Substantial damage
  > The restriction of the carburetor float as a result of a misadjusted retractor clip. A contributing factor was the fire.
- [NTSB DFW07CA126](https://openairdocs.org/ntsb/DFW07CA126.md): Gray Jack Tean Rocket F1 · Seabrook, TX · Accident · Minor injuries · Data collection · Final report · Jun 1, 2007 · N61R · Substantial damage
  > The loss of engine power for undetermined reason. A contributing factor was the lack of suitable terrain for the precautionary landing.
- [NTSB LAX07LA179](https://openairdocs.org/ntsb/LAX07LA179.md): Cessna TU206G · Napa, CA · Accident · Minor injuries · Limited investigation · Final report · May 28, 2007 · N7395C · Substantial damage
  > Failure of the number 5 connecting rod due to oil starvation.
- [NTSB NYC07LA125](https://openairdocs.org/ntsb/NYC07LA125.md): Cessna 172E · Leesburg, VA · Accident · Minor injuries · Limited investigation · Final report · May 23, 2007 · N3982S · Substantial damage
  > The loss of engine power that resulted from the failure of an exhaust valve rocker arm during cruise.
- [NTSB LAX07LA153](https://openairdocs.org/ntsb/LAX07LA153.md): Piper PA-28-140 · Tucson, AZ · Accident · No injuries · Limited investigation · Final report · May 8, 2007 · N5895U · Substantial damage
  > A loss of engine power while maneuvering due to a broken exhaust valve. Contributing to the accident was the rough terrain.
- [NTSB NYC07LA107](https://openairdocs.org/ntsb/NYC07LA107.md): Grumman S-2B · Cherry Point, NC · Accident · Serious injuries · Limited investigation · Final report · May 3, 2007 · N5234A · Substantial damage
  > The flightcrew's failure to comply with the published emergency procedure following a loss of engine power on the right engine. Contributing to the accident was the failure of a magneto in the right engine.
- [NTSB ATL07LA079](https://openairdocs.org/ntsb/ATL07LA079.md): Hughes 369D · Whiteville, NC · Accident · Minor injuries · Limited investigation · Final report · Apr 24, 2007 · N11AS · Substantial damage
  > A partial loss of engine power due to fatigue fracture of the power turbine governor spring, causing a false pneumatic signal to the fuel control and a corresponding reduction in fuel flow.
- [NTSB DEN07LA083](https://openairdocs.org/ntsb/DEN07LA083.md): Beech 35 · Topeka, KS · Accident · Minor injuries · Limited investigation · Final report · Apr 9, 2007 · N460B · Substantial damage
  > The use of unapproved bolts to mount the crankshaft and gear together, causing fatigue and failure of those mounting bolts, resulting in the subsequent loss of engine power. Factors contributing to the accident were the separation of the crankshaft gear, and…
- [NTSB ENG07IA018](https://openairdocs.org/ntsb/ENG07IA018.md): Learjet · Palm Springs, CA · Incident · No injuries · Incident investigation · Final report · Mar 31, 2007 · N244FX · Minor damage
  > The fatigue fracture of the fan blade due to the blade vendor's improper setup of the forging dies, which resulted in fan blades with airfoils that were below the minimum thickness in the highest stressed area of the airfoil and resulted in operating stresses…
- [NTSB ANC07LA026](https://openairdocs.org/ntsb/ANC07LA026.md): Cessna 175 · Bunnell, FL · Accident · No injuries · Limited investigation · Final report · Mar 31, 2007 · N8092T · Substantial damage
  > The loss of engine power during cruise due to the separation of an engine piston, which resulted in a forced landing in a swamp and a collision with trees.
- [NTSB ATL07LA063](https://openairdocs.org/ntsb/ATL07LA063.md): Randy Stanley Rotoway Exc 162F · Foley, AL · Accident · No injuries · Limited investigation · Final report · Mar 29, 2007 · N494D · Substantial damage
  > Loss of engine power due to failure of the No. 4 engine exhaust valve.
- [NTSB MIA07IA067](https://openairdocs.org/ntsb/MIA07IA067.md): Cessna 172S · Moore Haven, FL · Incident · No injuries · Incident investigation · Final report · Mar 26, 2007 · N57FH · No damage
  > A loss of engine power due to foreign object damage to the oil pump.
- [NTSB LAX07LA114](https://openairdocs.org/ntsb/LAX07LA114.md): Mooney M20B · St. George, UT · Accident · No injuries · Limited investigation · Final report · Mar 18, 2007 · N74503 · Substantial damage
  > Oil contamination of the right magneto. Factors were the airplane owner's failure to comply with manufacturer's service bulletins and overhaul porcedures.
- [NTSB NYC07LA068](https://openairdocs.org/ntsb/NYC07LA068.md): Piper PA-28-140 · Saluda, VA · Accident · Serious injuries · Limited investigation · Final report · Feb 22, 2007 · N32285 · Substantial damage
  > The improper repair of the carburetor heat control linkage by person(s) unknown. Contributing to the accident was the pilot's improper decision to takeoff, with the engine developing partial power.
- [NTSB ANC07LA016](https://openairdocs.org/ntsb/ANC07LA016.md): Douglas C54G-DC · Nenana, AK · Accident · No injuries · Limited investigation · Final report · Jan 17, 2007 · N82FA · Substantial damage
  > The failure of an engine cylinder during cruise flight, which resulted in an in-flight fire, and subsequent emergency gear-up landing on snow-covered tundra. A factor in the accident was the failure of the fire suppression equipment to extinguish the fire.
- [NTSB MIA07CA033](https://openairdocs.org/ntsb/MIA07CA033.md): Ryan Aeronautical ST3KR · Lake Butler, FL · Accident · Minor injuries · Data collection · Final report · Jan 6, 2007 · N56434 · Substantial damage
  > a partial loss of engine power due to a disconnected throttle control push-rod, which resulted in a forced landing and collision with trees and the ground.
- [NTSB MIA07LA032](https://openairdocs.org/ntsb/MIA07LA032.md): Clopton Aero Aerocomp Compair 7SL · Merritt Island, FL · Accident · Minor injuries · Limited investigation · Final report · Dec 21, 2006 · N286JL · Substantial damage
  > The airplane manufacturer's inadequate maintenance prior to final aircraft delivery, which resulted in fuel filter blockage and engine fuel starvation.
- [NTSB DFW07CA037](https://openairdocs.org/ntsb/DFW07CA037.md): Hughes 269B · Houma, LA · Accident · No injuries · Data collection · Final report · Dec 11, 2006 · N9396F · Substantial damage
  > A partial loss of engine power as a result of a cracked engine cylinder and broken spark plug which resulted in a hard landing. A factor was that it was not possible to attain proper rotor RPM.
- [NTSB LAX07LA040](https://openairdocs.org/ntsb/LAX07LA040.md): Stinson 108-1 · San Jose, CA · Accident · No injuries · Limited investigation · Final report · Nov 20, 2006 · N97949 · Substantial damage
  > Partial loss of engine power due to a seized exhaust valve during cruise flight. Rough terrain at the forced landing site was a contributing factor.
- [NTSB LAX07FA035](https://openairdocs.org/ntsb/LAX07FA035.md): Cessna 421B · Big Bear Lake, CA · Accident · 3 fatal · Field investigation · Final report · Nov 14, 2006 · N642BD · Destroyed
  > Failure of the turbine wheel shaft in the left turbocharger during the takeoff initial climb for undetermined reasons, and the pilot's failure to attain and maintain safe single engine airspeed that led to a loss of control.
- [NTSB DEN07CA019](https://openairdocs.org/ntsb/DEN07CA019.md): Luscombe 8F · Wellsville, KS · Accident · No injuries · Data collection · Final report · Nov 5, 2006 · N26324 · Substantial damage
  > A loss of engine power due to the ingestion of the number 2 intake valve into its cylinder. Contributing factors included the pilot allowing the airspeed and altitude to drop, making a safe landing not possible.
- [NTSB NYC07CA016](https://openairdocs.org/ntsb/NYC07CA016.md): Jahns RV-7 · Farmingdale, NJ · Accident · No injuries · Data collection · Final report · Oct 31, 2006 · N916R · Substantial damage
  > A loss of engine power due to a disconnected throttle/power lever linkage. A contributingfactor was the owner/builder's improper installation of the throttle linkage.
- [NTSB LAX07LA022](https://openairdocs.org/ntsb/LAX07LA022.md): Fish Vans RV-6 · Turlock, CA · Accident · Serious injuries · Limited investigation · Final report · Oct 28, 2006 · N1198N · Substantial damage
  > a partial loss of engine power due to the broken piston rings in the no. 4 cylinder. Also causal was the pilot's failure to maintain adequate airspeed while maneuvering for a forced landing, which resulted in a stall/mush.
- [NTSB DFW06CA217](https://openairdocs.org/ntsb/DFW06CA217.md): Brantly Helicopter B-2B · Carrizo Springs, TX · Accident · No injuries · Data collection · Final report · Sep 29, 2006 · N888CF · Substantial damage
  > The loss of engine power due to a malfunction of the electric fuel pump. A contributing factor was the lack of suitable terrain for the forced landing.
- [NTSB NYC06LA219](https://openairdocs.org/ntsb/NYC06LA219.md): Beech F33A · South Windsor, CT · Accident · Minor injuries · Limited investigation · Final report · Sep 7, 2006 · N3708B · Substantial damage
  > A loosening of the fuel injector lines from the fuel manifold valve, which resulted in a partial loss of engine power.
- [NTSB DFW06LA195](https://openairdocs.org/ntsb/DFW06LA195.md): Cessna A188B · Sumrall, MS · Accident · 1 fatal · Limited investigation · Final report · Aug 4, 2006 · N86188 · Substantial damage
  > The pilot's failure to maintain airspeed which resulted in an inadvertent stall. Contributing factors were the partial loss of engine power and the low altitude.
- [NTSB NYC06LA179](https://openairdocs.org/ntsb/NYC06LA179.md): Cessna 172N · Pompton Lakes, NJ · Accident · 1 fatal · Limited investigation · Final report · Jul 14, 2006 · N4792D · Destroyed
  > Improper maintenance of the throttle shaft, which resulted in a partial loss of engine power during cruise flight, and subsequent impact with trees during a forced landing.
- [NTSB LAX06LA230](https://openairdocs.org/ntsb/LAX06LA230.md): Cessna 152 · Pacoima, CA · Accident · Minor injuries · Limited investigation · Final report · Jul 14, 2006 · N25512 · Substantial damage
  > a loss of engine power due to the failure of maintenance personnel to tighten the top spark plugs, and install the leads for the ignition harness to the top spark plugs.
- [NTSB NYC06CA181](https://openairdocs.org/ntsb/NYC06CA181.md): Carlson Sparrow · New Galilee, PA · Accident · Serious injuries · Data collection · Final report · Jul 10, 2006 · UNREG · Substantial damage
  > The pilot's failure to maintain airspeed, which resulted in an inadvertent stall and impact with terrain. A factor in the accident was the partial loss of engine power for undetermined reasons.

Next page: https://openairdocs.org/ntsb.md?occurrence=352&page=2

## 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

---
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.