# NTSB investigations, 1997: 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 LAX98LA053](https://openairdocs.org/ntsb/LAX98LA053.md): McDonnell Douglas 369HS · Saipan, India · Accident · Minor injuries · Limited investigation · Final report · Dec 6, 1997 · N9068F · Destroyed
  > The failure of the maintenance facility to comply with the service bulletins, which resulted in the development of a corrosion pit, subsequent leakage and failure of the acceleration bellows of the fuel control.
- [NTSB CHI98LA046](https://openairdocs.org/ntsb/CHI98LA046.md): Luscombe 8A · Lincoln, NE · Accident · Minor injuries · Limited investigation · Final report · Nov 24, 1997 · N71329 · Substantial damage
  > the throttle linkage coming apart in flight, and the inadvertent stall.
- [NTSB NYC98FA018](https://openairdocs.org/ntsb/NYC98FA018.md): Enstrom F-28C · Fairview, PA · Accident · No injuries · Field investigation · Final report · Oct 24, 1997 · N1944J · Substantial damage
  > inadequate maintenance, which led to detonation and a melted piston, and subsequent power loss.
- [NTSB MIA98LA003](https://openairdocs.org/ntsb/MIA98LA003.md): Cessna 182G · Jackson, MS · Accident · Minor injuries · Limited investigation · Final report · Oct 3, 1997 · N3434S · Substantial damage
  > A partial loss of engine power during the initial climb due to a blockage of the induction system by a piece of gasket material.
- [NTSB ANC97LA158](https://openairdocs.org/ntsb/ANC97LA158.md): Pilatus PC-6-350 · Palmer, AK · Accident · No injuries · Limited investigation · Final report · Sep 30, 1997 · N4911 · Substantial damage
  > An underspeed of the propeller system.
- [NTSB MIA97LA251](https://openairdocs.org/ntsb/MIA97LA251.md): Cessna 170 · Troy, NC · Accident · No injuries · Limited investigation · Final report · Sep 29, 1997 · N2554V · Substantial damage
  > delay of the pilot to abort the takeoff after noting sluggish acceleration during the takeoff roll. Factors relating to the accident were: improper timing of the magneto(s), and a malfunction of the carburetor.
- [NTSB CHI97LA299](https://openairdocs.org/ntsb/CHI97LA299.md): Beech C23 · Champaign, IL · Accident · No injuries · Limited investigation · Final report · Sep 24, 1997 · N1851Z · Substantial damage
  > an undetermined engine and/or oil system failure that resulted in an oil leak and subsequent loss of engine power. A related factor was: high vegetation (corn crop) in the emergency landing area.
- [NTSB NYC97LA184](https://openairdocs.org/ntsb/NYC97LA184.md): Cessna 150L · Easton, NY · Accident · Serious injuries · Limited investigation · Final report · Sep 21, 1997 · N6865G · Substantial damage
  > mechanical binding of the number three exhaust valve, and the pilot/owner's improper planning/decision by failing to ensure the engine was operating properly before takeoff. A related factor was: the pilot/owner's failure to ensure that annual maintenance was…
- [NTSB MIA97LA250](https://openairdocs.org/ntsb/MIA97LA250.md): Piper PA-28R-200 · Miami, FL · Accident · No injuries · Limited investigation · Final report · Sep 19, 1997 · N4315X · Substantial damage
  > The failure of the pilot to properly plan his descent and approach for a forced landing following partial loss of engine power resulting in the aircraft landing short of the intended landing runway. A factor in the accident was improper inspection of the…
- [NTSB CHI97LA284](https://openairdocs.org/ntsb/CHI97LA284.md): North American-Aero Classics P-51D · Monroe, MI · Accident · 2 fatal · Limited investigation · Final report · Sep 6, 1997 · N6345T · Destroyed
  > the pilot operating the airplane with a known coolant leak, coolant exhaustion, overheating of the engine, and subsequent failure of a connecting rod, which resulted in a partial loss of engine power; and failure of the pilot to see the powerline. The…
- [NTSB ANC97LA141](https://openairdocs.org/ntsb/ANC97LA141.md): Cessna 150H · Yakutat, AK · Accident · No injuries · Limited investigation · Final report · Sep 2, 1997 · N467SR · Substantial damage
  > A partial blockage of the main fuel supply line to the engine, caused by improper manufacture of the fuel line by unknown maintenance personnel.
- [NTSB ATL97LA127](https://openairdocs.org/ntsb/ATL97LA127.md): Air Tractor AT-301 · Clewiston, FL · Accident · No injuries · Limited investigation · Final report · Aug 29, 1997 · N7307C · Substantial damage
  > The crack in the #8 cylinder head which led to the loss of power. A factor was the soft terrain.
- [NTSB FTW97LA322](https://openairdocs.org/ntsb/FTW97LA322.md): Rockwell S-2R · Columbus, NM · Accident · Serious injuries · Limited investigation · Final report · Aug 21, 1997 · N4893X · Substantial damage
  > a loss of engine power due to failure of an exhaust side rocker box and valve mechanism, and pilot incapacitation due to loss of consciousness after being struck in the head by parts separating from the engine.
- [NTSB MIA97LA233](https://openairdocs.org/ntsb/MIA97LA233.md): Air Tractor AT-301 · Waynesboro, GA · Accident · Minor injuries · Limited investigation · Final report · Aug 16, 1997 · N4411S · Substantial damage
  > The obscured vision of the pilot due to oil covering the windscreen. Contributing to the accident was the partial loss of engine power due to a cracked head of one of the cylinders and unsuitable terrain encountered during the forced landing.
- [NTSB SEA97LA186](https://openairdocs.org/ntsb/SEA97LA186.md): Cessna 172M · Langley, WA · Accident · No injuries · Limited investigation · Final report · Aug 5, 1997 · N73158 · Substantial damage
  > A failed exhaust valve. Factors were tailwind and excessive airspeed during the ensuing forced landing..
- [NTSB FTW97LA298](https://openairdocs.org/ntsb/FTW97LA298.md): Piper J3C-65 · Castle Rock, CO · Accident · No injuries · Limited investigation · Final report · Aug 3, 1997 · N5985V · Substantial damage
  > A partial loss of engine power due to a cylinder exhaust valve jammed in the open position from excessive carbon deposits. A factor was the lack of suitable terrain on which to make a forced landing.
- [NTSB LAX97LA261](https://openairdocs.org/ntsb/LAX97LA261.md): Classic Waco YMF · Sedona, AZ · Accident · No injuries · Limited investigation · Final report · Jul 26, 1997 · N369BP · Substantial damage
  > A partial loss of engine power due to a loose rocker arm adjustment nut on the number 6 cylinder. The loose adjustment nut was due to inadequate maintenance adjustment performed by the engine manufacturer.
- [NTSB FTW97LA258](https://openairdocs.org/ntsb/FTW97LA258.md): Aero Commander 500-B · Dallas, TX · Accident · Serious injuries · Limited investigation · Final report · Jul 8, 1997 · N802TC · Substantial damage
  > The pilot-in-command's failure to follow emergency procedures to reduce drag and maintain best climb airspeed. Factors were the partial loss of engine power due to the cracks in the #1 and #4 cylinders as the result of an unapproved modification of their…
- [NTSB ANC97FA099](https://openairdocs.org/ntsb/ANC97FA099.md): de Havilland DHC-2 · Skwentna, AK · Accident · 4 fatal · Field investigation · Final report · Jul 5, 1997 · N5164G · Substantial damage
  > a loss of engine power due to the fatigue failure of the no.1 exhaust push rod. Factors contributing to the accident were: insufficient information on pushrod inspection and overhaul from the manufacturer, unsuitable terrain available for landing, and the…
- [NTSB NYC97LA132](https://openairdocs.org/ntsb/NYC97LA132.md): Globe GC-1B · Yates, NY · Accident · No injuries · Limited investigation · Final report · Jun 30, 1997 · CFNXL · Substantial damage
  > The failure of the cylinder bolts, and the lack of suitable terrain for a forced landing.
- [NTSB SEA97LA152](https://openairdocs.org/ntsb/SEA97LA152.md): Cessna 172A · Ogden, UT · Accident · Minor injuries · Limited investigation · Final report · Jun 26, 1997 · N6844X · Substantial damage
  > The fracture of the no. 4 exhaust valve and subsequent loss of engine power. Factors contributing to the accident include a congested landing area, and rough terrain.
- [NTSB CHI97FA188](https://openairdocs.org/ntsb/CHI97FA188.md): Cessna 172N · Canton, MI · Accident · Serious injuries · Field investigation · Final report · Jun 26, 1997 · N7031Q · Substantial damage
  > A loss of engine power due to fuel starvation from a binding throttle/power lever cable. Also causal was the improper maintenance, installation of the throttle arm. Contributing to the accident were the dark night and unsuitable terrain for the forced landing.
- [NTSB LAX97LA224](https://openairdocs.org/ntsb/LAX97LA224.md): Enstrom F-28-F · Riverside, CA · Accident · Minor injuries · Limited investigation · Final report · Jun 25, 1997 · N99YC · Substantial damage
  > failure by unknown maintenance personnel to retorque the nuts on the retainer cover.
- [NTSB NYC97LA128](https://openairdocs.org/ntsb/NYC97LA128.md): Mooney M20C · Bellwood, PA · Accident · Minor injuries · Limited investigation · Final report · Jun 24, 1997 · N6756N · Substantial damage
  > the total loss of engine power due to failed connecting rods.
- [NTSB NYC97LA124](https://openairdocs.org/ntsb/NYC97LA124.md): Piper PA-28-140 · Hammonton, NJ · Accident · Serious injuries · Limited investigation · Final report · Jun 21, 1997 · N43464 · Destroyed
  > A loss of engine power due to a partially blocked engine muffler.
- [NTSB MIA97LA190](https://openairdocs.org/ntsb/MIA97LA190.md): Schweizer G-164B · Edwards, MS · Accident · No injuries · Limited investigation · Final report · Jun 20, 1997 · N6816Q · Substantial damage
  > failure of the distributor drive gear in the right magneto, resulting in loss of engine power and a forced landing. The lack of suitable terrain for a forced landing was a related factor.
- [NTSB MIA97LA182](https://openairdocs.org/ntsb/MIA97LA182.md): Cessna 210F · Waycross, GA · Accident · Minor injuries · Limited investigation · Final report · Jun 13, 1997 · N1817F · Substantial damage
  > the private pilot's failure to maintain airspeed, while maneuvering in an attempt to reverse direction, which resulted in an inadvertent stall, and subsequent in-flight collision with terrain.
- [NTSB IAD97LA085](https://openairdocs.org/ntsb/IAD97LA085.md): Mc Ardle Kolb Mark III · Findlay, OH · Accident · Serious injuries · Limited investigation · Final report · Jun 11, 1997 · N1144T · Substantial damage
  > The loss of power due to one of two carburetors disconnecting in flight for undetermined reasons, and the subsequent collision with the terrain during forced landing.
- [NTSB NYC97LA149](https://openairdocs.org/ntsb/NYC97LA149.md): Piper PA-25-235 · Preston, MD · Accident · No injuries · Limited investigation · Final report · May 29, 1997 · N4497Y · Substantial damage
  > The pilot's improper flare during a precautionary landing, which resulted in a hard landing. A factor in the accident was the failure of the left magneto, which resulted in a partial loss of engine power.
- [NTSB SEA97LA116](https://openairdocs.org/ntsb/SEA97LA116.md): Piper PA-28-140 · Hysham, MT · Accident · Minor injuries · Limited investigation · Final report · May 20, 1997 · N32142 · Substantial damage
  > A failure of an engine exhaust valve and the pilot's misjudgement of altitude/distance during an emergency landing at an airstrip.
- [NTSB CHI97LA142](https://openairdocs.org/ntsb/CHI97LA142.md): Mooney M20F · Wheeling, IL · Accident · No injuries · Limited investigation · Final report · May 20, 1997 · N6950V · Substantial damage
  > binding of the number four exhaust valve, which resulted in a partial power loss. A factor was the ravine.
- [NTSB FTW97LA185](https://openairdocs.org/ntsb/FTW97LA185.md): Mooney M20C · Torreon, NM · Accident · Minor injuries · Limited investigation · Final report · May 9, 1997 · N7853V · Substantial damage
  > failure of the forward number four piston pin plug, and the subsequent obstruction of internal oil passages of the lubricating system, which resulted in partial loss of engine power. Factors relating to the accident were: the crosswind condition and lack of…
- [NTSB FTW97LA180](https://openairdocs.org/ntsb/FTW97LA180.md): Cessna 172N · Las Cruces, NM · Accident · No injuries · Limited investigation · Final report · May 7, 1997 · N733WJ · Substantial damage
  > The improper installation of the throttle arm castellated nut, which resulted in a partial loss of power. A factor was the lack of suitable terrain for the forced landing.
- [NTSB CHI97IA117](https://openairdocs.org/ntsb/CHI97IA117.md): Boeing 737-200 · Chicago, IL · Incident · Minor injuries · Incident investigation · Final report · Apr 28, 1997 · N9063U · Minor damage
  > inadequate nickel plating was applied to the compressor disk during the rework process at the operator's overhaul facility, which resulted in a brittle fracture in the disk and an uncontained engine failure. A factor was the operator's lack of written…
- [NTSB LAX97LA163](https://openairdocs.org/ntsb/LAX97LA163.md): Piper PA-28R-201T · Tucson, AZ · Accident · No injuries · Limited investigation · Final report · Apr 18, 1997 · N2847F · Substantial damage
  > The partial blockage of the No. 2 cylinder injection line/nozzle by a transient contaminant, which induced an excessively lean mixture in that cylinder, and the subsequent overheating of the cylinder and intake valve. The engine power loss was due to the open…
- [NTSB MIA97LA112](https://openairdocs.org/ntsb/MIA97LA112.md): Charles J. Keuthan Zephyr II · Bunnell, FL · Accident · Serious injuries · Limited investigation · Final report · Mar 31, 1997 · N52958 · Substantial damage
  > Inadvertent stall/mush by the pilot while maneuvering for a forced landing. Contributing to the accident was the partial loss of engine power due to a partial failure of the top compression ring of one of the cylinders.
- [NTSB CHI97FA093](https://openairdocs.org/ntsb/CHI97FA093.md): Stinson 108 · Greenfield, IN · Accident · 1 fatal · Field investigation · Final report · Mar 27, 1997 · N97120 · Destroyed
  > a loss of engine power due to restricted movement in the exhaust valve and rotted/weathered ignition harness, and the pilot's failure to maintain airspeed which resulted in an inadvertant stall.
- [NTSB ANC97LA042](https://openairdocs.org/ntsb/ANC97LA042.md): Cessna 207 · Grayling, AK · Accident · Minor injuries · Limited investigation · Final report · Mar 27, 1997 · N1747U · Substantial damage
  > The partial loss of engine power due to a fractured connecting rod bolt, which was precipitated by fatigue. A factor associated with the accident was the snow covered terrain in the emergency landing site.
- [NTSB FTW97LA117](https://openairdocs.org/ntsb/FTW97LA117.md): Grumman G-164 · Newkirk, OK · Accident · No injuries · Limited investigation · Final report · Mar 6, 1997 · N527Y · Substantial damage
  > The partial loss of engine power due to failure of the blower (integral supercharger). A factor was the power line over which the pilot had to maneuver during the forced landing which resulted in insufficient airspeed to flare the airplane.
- [NTSB SEA97LA061](https://openairdocs.org/ntsb/SEA97LA061.md): Luscombe 8A · Morgan, UT · Accident · No injuries · Limited investigation · Final report · Feb 22, 1997 · N77947 · Substantial damage
  > Disconnection of the mixture control wire wound cable sheath. A factor was the abrupt, elevated edge of the highway pavement.
- [NTSB ATL97IA035](https://openairdocs.org/ntsb/ATL97IA035.md): Boeing 757-232 · Atlanta, GA · Incident · No injuries · Incident investigation · Final report · Jan 31, 1997 · N611DL · Minor damage
  > failure of the Stage 1 High Pressure Turbine due to a fatigue fracture in a disk blade retention lug.
- [NTSB FTW97LA086](https://openairdocs.org/ntsb/FTW97LA086.md): Mahan Starduster II · Atlanta, TX · Accident · Serious injuries · Limited investigation · Final report · Jan 19, 1997 · N45227 · Substantial damage
  > improper maintenance by unknown person(s), which resulted in the failure of the throttle cable and a substantial loss of engine power. A factor relating to the accident was: the lack of suitable terrain for the forced landing.
- [NTSB LAX97LA088](https://openairdocs.org/ntsb/LAX97LA088.md): McDonnell Douglas 369D · Kamuela, HI · Accident · No injuries · Limited investigation · Final report · Jan 12, 1997 · N7012G · Substantial damage
  > fuel system contamination resulting in a partial loss of power, and the failure of the pilot to maintain adequate rotor rpm to cushion the autorotative landing and prevent main rotor blade contact with the tailboom. Factors were the inadequacy of…

## 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") = 1997
  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=1997

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