# NTSB investigations, 2004: 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 LAX05LA057](https://openairdocs.org/ntsb/LAX05LA057.md): Orr Long-Ez · Yucca Valley, CA · Accident · No injuries · Limited investigation · Final report · Dec 31, 2004 · N321EZ · Substantial damage
  > a loss of engine power due to ignition system failure due to rain water grounding/shorting of the magneto switches.
- [NTSB SEA05LA032](https://openairdocs.org/ntsb/SEA05LA032.md): Aerostar 601 · Hamilton, MT · Accident · No injuries · Limited investigation · Final report · Dec 30, 2004 · N601DF · Destroyed
  > A partial loss of engine power due to the lack of lubrication and subsequent failure of the left engine's right turbocharger for undetermined reasons, and subsequent forced landing after takeoff. A factor was the unsuitable terrain for the forced landing.
- [NTSB IAD05LA026](https://openairdocs.org/ntsb/IAD05LA026.md): Cessna 150C · East Moriches, NY · Accident · Minor injuries · Limited investigation · Final report · Dec 25, 2004 · N7857Z · Substantial damage
  > Several mechanical deficiencies which either independently or collectively resulted in a subsequent loss of engine power. A factor in the accident was the obstruction in the forced landing area.
- [NTSB NYC05LA030](https://openairdocs.org/ntsb/NYC05LA030.md): Day VP-2 · Warrenton, VA · Accident · No injuries · Limited investigation · Final report · Dec 8, 2004 · N19LC · Substantial damage
  > A loss of engine power for an undetermined reason.
- [NTSB ATL05FA032](https://openairdocs.org/ntsb/ATL05FA032.md): Cessna 421B · Apison, TN · Accident · 5 fatal · Field investigation · Final report · Dec 2, 2004 · N421SD · Destroyed
  > The pilot's improper identification of a partial loss of engine power on initial takeoff climb resulting in a collision with trees and the ground. A factor was a partial failure of the left engine starter adapter due to overload.
- [NTSB LAX05LA042](https://openairdocs.org/ntsb/LAX05LA042.md): Piper PA-22-108 · Big Pine, CA · Accident · No injuries · Limited investigation · Final report · Nov 28, 2004 · N4913Z · Substantial damage
  > oil exhaustion due to an improper oil breather tube installation, which became plugged in flight due to frozen moisture build-up. The blocked breather tube then created a crankcase over pressure that caused a failure of the crankshaft seal. The rough, uneven…
- [NTSB CHI05CA036](https://openairdocs.org/ntsb/CHI05CA036.md): Spaulding Tailwind W-8 · Davey, NE · Accident · No injuries · Data collection · Final report · Nov 24, 2004 · N191AS · Substantial damage
  > The loss of engine power due to the loss of oil pressure as a result of the pilot's failure to properly install the oil line to the oil cooler. A factor was the rough terrain.
- [NTSB DEN05CA020](https://openairdocs.org/ntsb/DEN05CA020.md): Mooney M20E · Santa Rosa, NM · Accident · No injuries · Data collection · Final report · Nov 5, 2004 · N2695W · Substantial damage
  > Inadequate maintenance inspection which failed to detect the separation of the right P-lead, resulting in a loss of engine power.
- [NTSB LAX05LA025](https://openairdocs.org/ntsb/LAX05LA025.md): Eurocopter AS350B3 · Sierra Vista, AZ · Accident · No injuries · Limited investigation · Final report · Nov 2, 2004 · N106LN · Substantial damage
  > An inconsistency between the engines' two N2 sensor signals caused the fuel control to enter a fixed mode, which limited the power available. Contributing to the accident was the lack of altitude and airspeed available to give the pilot time to select a…
- [NTSB LAX05LA002](https://openairdocs.org/ntsb/LAX05LA002.md): Classic Waco YMF · Sedona, AZ · Accident · No injuries · Limited investigation · Final report · Oct 2, 2004 · N43064 · Substantial damage
  > a loss of engine power due to the fatigue fracture of the number 7 cylinder exhaust rocker arm as a result of a grinding operation during manufacture.
- [NTSB ATL05LA001](https://openairdocs.org/ntsb/ATL05LA001.md): Stinson 108 · Ashland, AL · Accident · Minor injuries · Limited investigation · Final report · Oct 2, 2004 · N40129 · Substantial damage
  > A total loss of engine power in cruise flight due to the fatigue failure of the No.4 cylinder exhaust valve.
- [NTSB DFW05CA021](https://openairdocs.org/ntsb/DFW05CA021.md): Bellanca BL-17-30A · Roanoke, TX · Accident · No injuries · Data collection · Final report · Sep 27, 2004 · N28086 · Substantial damage
  > The disconnection of the engine mixture control cable due to improper maintenance which resulted in a loss of engine power.
- [NTSB IAD04LA048](https://openairdocs.org/ntsb/IAD04LA048.md): Boeing A75N (PT17) · Bayport, NY · Accident · Minor injuries · Limited investigation · Final report · Sep 22, 2004 · N57003 · Substantial damage
  > The failure of a magneto, which resulted in a loss of engine power. Factors in the accident were the pilot's decision to take off downwind, which resulted in reduced airplane performance, and the tail wind.
- [NTSB ATL04CA191](https://openairdocs.org/ntsb/ATL04CA191.md): Pinkham Challenger II · Lancaster, SC · Accident · Serious injuries · Data collection · Final report · Sep 22, 2004 · N2079S · Substantial damage
  > A partial loss of engine power in-flight due to water ingestion and his misjudgment of obstacle clearance resulting in a collision with trees and the ground. A factor in the accident was the pilot's failure to follow the manufactures instructions for…
- [NTSB CHI04CA261](https://openairdocs.org/ntsb/CHI04CA261.md): Abbott RAF 2000 · Pontiac, MI · Accident · No injuries · Data collection · Final report · Sep 18, 2004 · N702BX · Substantial damage
  > The partial loss of engine power due to the scoring and overheating of the cylinders as a result of the pilot/owner's improper servicing of the modified engine cooling system. Additional factors included the pilot/owner modifying and servicing the engine…
- [NTSB NYC04LA211](https://openairdocs.org/ntsb/NYC04LA211.md): Cessna 172M · Medina, OH · Accident · No injuries · Limited investigation · Final report · Sep 10, 2004 · N172WW · Substantial damage
  > The partial loss of engine power due to inadequate maintenance and by failure to comply with service instruction for low engine compression.
- [NTSB DEN04LA136](https://openairdocs.org/ntsb/DEN04LA136.md): Cessna 182 · Gillette, WY · Accident · No injuries · Limited investigation · Final report · Sep 6, 2004 · N2725G · Substantial damage
  > improper engine overhaul performed by the mechanic which resulted in the fractured exhaust valve and subsequent partial loss of engine power. Contributing to the accident was the lack of suitable terrain for a forced landing.
- [NTSB MIA04LA123](https://openairdocs.org/ntsb/MIA04LA123.md): Bell 206B3 · Panama City, FL · Accident · No injuries · Limited investigation · Final report · Aug 24, 2004 · N107PH · Substantial damage
  > Inadequate maintenance inspection resulting in the partial loss of engine power due to a loose pneumatic line on the governor and ditching of the helicopter.
- [NTSB MIA04LA122](https://openairdocs.org/ntsb/MIA04LA122.md): Robinson R-22 · West Palm Beach, FL · Accident · Minor injuries · Limited investigation · Final report · Aug 24, 2004 · N4062X · Substantial damage
  > The partial loss of engine power due to low cylinder compression during recovery from a practice autorotation resulting in a hard landing and damage to the helicopter.
- [NTSB CHI04CA237](https://openairdocs.org/ntsb/CHI04CA237.md): Enstrom F-28A · Leroy, MN · Accident · Serious injuries · Data collection · Final report · Aug 23, 2004 · N9573 · Substantial damage
  > The partial loss of engine power due to the missing 1/8-27 NPT Allen plug as a result of other maintenance personnel undertorquing the plug. Additionally, the pilot improperly excecuted a run on landing. A factor was the loss of tail rotor effectiveness.
- [NTSB CHI04FA234](https://openairdocs.org/ntsb/CHI04FA234.md): Cessna 172E · Decorah, IA · Accident · 2 fatal · Field investigation · Final report · Aug 22, 2004 · N5410T · Destroyed
  > The pilot's intentional operation of the airplane with a defective magneto, his failure to abort the takeoff due to degraded aircraft performance, and his failure to obtain or maintain airspeed which resulted in a stall/spin and subsequent impact with the…
- [NTSB NYC04LA192](https://openairdocs.org/ntsb/NYC04LA192.md): Waco QCF · Rhinebeck, NY · Accident · No injuries · Limited investigation · Final report · Aug 14, 2004 · N11478 · Substantial damage
  > A partial loss of engine power due to a magneto failure.
- [NTSB DCA04IA066](https://openairdocs.org/ntsb/DCA04IA066.md): Boeing B-777 · Houston, TX · Incident · No injuries · Incident investigation · Final report · Aug 11, 2004 · G-VIID · Minor damage
  > the failure of a high pressure turbine blade which damaged an oil seal and allowed smoke to enter the cabin. Contributing to the blade failure was the mis-labeling of the blade's part number by the manufacturer, which allowed the blade to remain in service…
- [NTSB IAD04LA035](https://openairdocs.org/ntsb/IAD04LA035.md): Giles Mustang II · Rainelle, WV · Accident · Serious injuries · Limited investigation · Final report · Aug 8, 2004 · N91061 · Substantial damage
  > The partial loss of engine power due to a broken throttle mechanism, which resulted in a forced landing over unsuitable terrain
- [NTSB NYC04LA186](https://openairdocs.org/ntsb/NYC04LA186.md): Cessna 150E · Marlboro, MA · Accident · Minor injuries · Limited investigation · Final report · Aug 7, 2004 · N6159T · Substantial damage
  > The loss of engine power due to a stuck cylinder exhaust valve. Factors were the tailwind and a jammed engine cylinder exhaust valve.
- [NTSB SEA04LA139](https://openairdocs.org/ntsb/SEA04LA139.md): Grumman G-164A · Nyssa, OR · Accident · Minor injuries · Limited investigation · Final report · Jul 23, 2004 · N7220 · Substantial damage
  > The failure (fracture) of the number four cylinder head during an aerial application run. Factors include the soft crop-covered terrain.
- [NTSB DEN04LA112](https://openairdocs.org/ntsb/DEN04LA112.md): Swearingen SA-226T · Rifle, CO · Accident · No injuries · Limited investigation · Final report · Jul 21, 2004 · N84GA · Substantial damage
  > the pilot's failure to maintain aircraft control during the aborted takeoff resulting in the airplane departing the runway and striking a runway light and two taxiway signs. Factors contributing to the accident were the broken sensor wire to the left engine's…
- [NTSB CHI04TA193](https://openairdocs.org/ntsb/CHI04TA193.md): PZL-Mielec M-18T · Pine Ridge, SD · Accident · No injuries · Final report · Jul 12, 2004 · N7077N · Substantial damage
  > The propeller went to an overspeed condition as a result of contamination of the propeller control unit due to improper servicing by the operator and the mechanic. A factor was the hilly terrain.
- [NTSB DEN04CA101](https://openairdocs.org/ntsb/DEN04CA101.md): Whitlock Rotorway Exec 162F · Meeker, CO · Accident · No injuries · Data collection · Final report · Jul 10, 2004 · N518W · Substantial damage
  > aircraft control not maintained by the pilot. A contributing factor was the failure of the supercharger.
- [NTSB FTW04LA176](https://openairdocs.org/ntsb/FTW04LA176.md): Rockwell S-2R · Jonesville, LA · Accident · Minor injuries · Limited investigation · Final report · Jul 6, 2004 · N8486V · Substantial damage
  > The pilot's failure to maintain clearance with the power lines.
- [NTSB NYC04LA156](https://openairdocs.org/ntsb/NYC04LA156.md): Cessna 182Q · Brighton Beach, NY · Accident · No injuries · Limited investigation · Final report · Jul 4, 2004 · N6550F · Substantial damage
  > A partial loss of engine power during cruise flight for undetermined reasons.
- [NTSB DEN04CA096](https://openairdocs.org/ntsb/DEN04CA096.md): Cessna T210J · Cheyenne, WY · Accident · Minor injuries · Data collection · Final report · Jul 3, 2004 · N2KD · Substantial damage
  > the detachment of the nut and bolt that attaches the throttle control cable to the fuel induction due to improper maintenance. Contributing factors were the fiber optics wire, fence, and ditch, and the unavailability of suitable terrain on which to make a…
- [NTSB IAD04LA027](https://openairdocs.org/ntsb/IAD04LA027.md): Grumman G-164A · Chatsworth, NJ · Accident · No injuries · Limited investigation · Final report · Jul 2, 2004 · N915X · Substantial damage
  > A blocked internal oil passage, which resulted in inadequate lubrication of the blower impeller shaft, and the subsequent partial loss of engine power.
- [NTSB NYC04CA150](https://openairdocs.org/ntsb/NYC04CA150.md): Henes Zenair CH 701 · Mansfield, OH · Accident · No injuries · Data collection · Final report · Jul 1, 2004 · N98EH · Substantial damage
  > The pilot's failure to maintain directional control during a precautionary landing. A factor was the pilot's unapproved maintenance modification resulting in the loss of oil pressure and partial loss of engine power.
- [NTSB MIA04LA097](https://openairdocs.org/ntsb/MIA04LA097.md): Gulfstream American AA5B · Crystal River, FL · Accident · No injuries · Limited investigation · Final report · Jun 14, 2004 · N4516V · Substantial damage
  > The failure of the number three cylinder exhaust valve which resulted in the partial loss of engine power. The pilot's misjudgment of speed and distance resulted in an overrun of the runway.
- [NTSB LAX04LA267](https://openairdocs.org/ntsb/LAX04LA267.md): Schweizer G-164B · Richvale, CA · Accident · No injuries · Limited investigation · Final report · Jun 7, 2004 · N3626T · Substantial damage
  > the loss of engine power during takeoff due to the engine's deteriorated fuel control unit's inner drive shaft bearing. The reason for the bearing's deteriorated condition could not be determined.
- [NTSB FTW04LA131](https://openairdocs.org/ntsb/FTW04LA131.md): Cooke Rotorway Exec · Willis, TX · Accident · No injuries · Limited investigation · Final report · May 15, 2004 · N319RC · Substantial damage
  > The partial loss of engine power due to the failure of the #1 cylinder valve retainer clip. A contributing factor was the lack of suitable terrain for the forced landing.
- [NTSB MIA04FA076](https://openairdocs.org/ntsb/MIA04FA076.md): Cessna 177RG · Tampa, FL · Accident · 2 fatal · Field investigation · Final report · Apr 20, 2004 · N1910Q · Substantial damage
  > Improper maintenance by other maintenance personnel, and the reinstallation of an unserviced magneto during an engine overhaul, which resulted in the magneto malfunctioning, a loss of engine power, and the airplane being ditched into the water.
- [NTSB FTW04LA109](https://openairdocs.org/ntsb/FTW04LA109.md): Spannagel RV-8A · Borger, TX · Accident · No injuries · Limited investigation · Final report · Apr 15, 2004 · N82LS · Substantial damage
  > A partial loss of engine power as a result of inadequate clearance between the journals and bearings.
- [NTSB LAX04FA187](https://openairdocs.org/ntsb/LAX04FA187.md): Piper PA-28RT-201T · Concord, CA · Accident · Serious injuries · Field investigation · Final report · Apr 13, 2004 · N2920C · Destroyed
  > a loss of engine power due to improper maintenance repair procedures and use of improper parts.
- [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 SEA04LA064](https://openairdocs.org/ntsb/SEA04LA064.md): Grumman G-44 · Belliigham, WA · Accident · No injuries · Limited investigation · Final report · Apr 2, 2004 · N65914 · Substantial damage
  > The failure of the pilot to select the proper touchdown point while conducting a forced landing. Factors included the #1 engine malfunction, the right propeller oil control valve leak, and the shallow subsurface terrain condition.
- [NTSB LAX04LA170](https://openairdocs.org/ntsb/LAX04LA170.md): Cessna 188B · Planada, CA · Accident · No injuries · Limited investigation · Final report · Mar 25, 2004 · N478Q · Destroyed
  > the partial loss of engine power due to the separation of the number 5 cylinder fuel injector supply line. The fuel line separation was due to company maintenance personnel's failure to secure the b-nut fitting following maintenance. Factors in the accident…
- [NTSB IAD04LA008](https://openairdocs.org/ntsb/IAD04LA008.md): Rockwell 112A · Bedford, MA · Accident · Minor injuries · Limited investigation · Final report · Jan 25, 2004 · N1381J · Destroyed
  > Failure of the #2 piston connecting rod cap, which resulted in a hole in the engine crankcase and a loss of engine power. A factor was dark night lighting condition.
- [NTSB FTW04LA059](https://openairdocs.org/ntsb/FTW04LA059.md): Piper PA-23-160 · Fort Worth, TX · Accident · No injuries · Limited investigation · Final report · Jan 9, 2004 · N3289P · Substantial damage
  > The pilot's failure to maintain control and the partial loss of engine power as a result of an improperly installed mixture control linkage.

## 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 year(c."eventDate") = 2004
  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&year=2004

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