# 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 16 of 29 · 1,408 cases

## Cases, newest first

- [NTSB CHI90DEV08](https://openairdocs.org/ntsb/CHI90DEV08.md): Hilvety Cwii · Moweaqua, IL · Accident · Minor injuries · Final report · Aug 3, 1990 · N7176J · Substantial damage
  > The pilot's failure to maintain flying speed and stalling the airplane while attempting to reverse course for a forced landing. Contributing to the accident was the pilot's failure to properly reinstall spark plug cables during servicing conducted prior to…
- [NTSB ATL90LA151](https://openairdocs.org/ntsb/ATL90LA151.md): Cessna 172B · Midway, TN · Accident · Minor injuries · Limited investigation · Final report · Jul 29, 1990 · N8091X · Substantial damage
  > Total failure of the number four exhaust valve, resulting in engine power loss and the subsequent forced landing of the airplane.
- [NTSB FTW90DPG06](https://openairdocs.org/ntsb/FTW90DPG06.md): WSK PZL Mielec M18A · Hunter, AR · Accident · No injuries · Final report · Jul 28, 1990 · N81699 · Destroyed
  > Loss of part of the engine exhaust collector, as result of improper maintenance replacement/installation.
- [NTSB ATL90DKJ07](https://openairdocs.org/ntsb/ATL90DKJ07.md): Bell-Continental Copters 47G · Clayhatchee, AL · Accident · Serious injuries · Final report · Jul 27, 1990 · N7153 · Substantial damage
  > Failure of the engine magneto(s). The lack of suitable terrain (trees) in the emergency landing area was a related factor.
- [NTSB LAX90LA263](https://openairdocs.org/ntsb/LAX90LA263.md): Piper PA-28-140 · Clarksburg, CA · Accident · Minor injuries · Limited investigation · Final report · Jul 21, 1990 · N1570J · Substantial damage
  > The failure of the airplane's muffler during initial climb.
- [NTSB LAX90LA259](https://openairdocs.org/ntsb/LAX90LA259.md): Cessna 421C · Lancaster, CA · Accident · No injuries · Limited investigation · Final report · Jul 18, 1990 · N6089X · Substantial damage
  > The accident was eroded ignition spark plug electrodes and maintenance personnel neglecting to adjust spark plug electrodes and maintenance personnel neglecting to adjust spark plug gap. The rough terrain in which the aircraft landed was a factor in the…
- [NTSB DEN90LA164](https://openairdocs.org/ntsb/DEN90LA164.md): Mooney M20F · Torrington, WY · Accident · No injuries · Limited investigation · Final report · Jul 14, 1990 · N6456Q · Substantial damage
  > A partial loss of power due to a failed exhaust valve. A factor was the lack of suitable terrain for the forced landing.
- [NTSB CHI90DEP07](https://openairdocs.org/ntsb/CHI90DEP07.md): Bell 47-G2 · Hatley, WI · Accident · No injuries · Final report · Jul 10, 1990 · N6768D · Substantial damage
  > The partial loss of power due to sticking intake valves.
- [NTSB LAX90LA241](https://openairdocs.org/ntsb/LAX90LA241.md): Cessna 152 · Fullerton, CA · Accident · No injuries · Limited investigation · Final report · Jul 2, 1990 · N48418 · Substantial damage
  > The warped condition of the engine valves and valve seats due to excessive and repeated thermal shock cycles.
- [NTSB ANC90LA103](https://openairdocs.org/ntsb/ANC90LA103.md): De Havilland DHC-3 · Beaver Village, AK · Accident · Minor injuries · Limited investigation · Final report · Jun 30, 1990 · N17689 · Substantial damage
  > Mechanical failure of an exhaust rocker arm.
- [NTSB LAX90DUA01](https://openairdocs.org/ntsb/LAX90DUA01.md): Homebuilt JP-350-1 · Torrance, CA · Accident · Minor injuries · Final report · Jun 28, 1990 · N350JP · Substantial damage
  > The aircraft collision with the ground after the pilot experienced a loss of engine thrust due to propeller overspeed condition. Contributing to the accident was the pilot's improper servicing of the propeller hub that allowed the overspeed to occur.
- [NTSB MKC90LA139](https://openairdocs.org/ntsb/MKC90LA139.md): Grumman G-164A · Swifton, AR · Accident · Minor injuries · Limited investigation · Final report · Jun 27, 1990 · N5203 · Substantial damage
  > Failure of the engine driven blower assembly. A factor was the lack of suitable terrain for the forced landing.
- [NTSB LAX90LA231](https://openairdocs.org/ntsb/LAX90LA231.md): Cessna 152 · Fillmore, CA · Accident · No injuries · Limited investigation · Final report · Jun 26, 1990 · N528CA · Substantial damage
  > The inadvertent engagement of the starter during flight for undetermined reasons. >
- [NTSB FTW90FA125](https://openairdocs.org/ntsb/FTW90FA125.md): Bellanca 17-30A · Dallas, TX · Accident · 2 fatal · Field investigation · Final report · Jun 26, 1990 · N6608V · Destroyed
  > The initial partial loss of engine power, followed by the total loss of engine power and the striking of a hidden set of transmission wires.
- [NTSB CHI90LA155](https://openairdocs.org/ntsb/CHI90LA155.md): Cessna 150 · Flint, MI · Accident · No injuries · Limited investigation · Final report · Jun 16, 1990 · N6583T · Destroyed
  > A loose fuel line caused by improper installation by maintenance personnel.
- [NTSB MKC90LA128](https://openairdocs.org/ntsb/MKC90LA128.md): Air Tractor AT-301 · Ulysses, KS · Accident · No injuries · Limited investigation · Final report · Jun 15, 1990 · N3650Z · Substantial damage
  > Failure of the powerplant cylinder and stall/mush encountered by the pilot in command.
- [NTSB CHI90DEP05](https://openairdocs.org/ntsb/CHI90DEP05.md): Cirrus Klappmeier Cirrus VF-30 · Baraboo, WI · Accident · No injuries · Final report · Jun 14, 1990 · N888EK · Destroyed
  > Manufacturer's inadequate equipment design to prevent a fuel leak which resulted in an in-flight fire. A factor related to the accident was the lack of an unsuitable forced landing area.
- [NTSB MKC90LA126](https://openairdocs.org/ntsb/MKC90LA126.md): Grumman G-164A · Fisher, AR · Accident · No injuries · Limited investigation · Final report · Jun 12, 1990 · N5257 · Destroyed
  > Partial loss of engine power for an undetermined reason.
- [NTSB DEN90LA127](https://openairdocs.org/ntsb/DEN90LA127.md): Aero Commander S2R · Sisseton, SD · Accident · No injuries · Limited investigation · Final report · Jun 7, 1990 · N5649X · Substantial damage
  > A total loss of power due to fuel starvation. Fuel starvation was caused by a missing fuel valve support clamp and a resultant cracked fuel line. Inadequate maintenance inspections and rough, uneven terrain were contributing factors.
- [NTSB CHI90LA136](https://openairdocs.org/ntsb/CHI90LA136.md): Cessna 182F · Clare, MI · Accident · No injuries · Limited investigation · Final report · May 26, 1990 · N3632U · Substantial damage
  > Improper maintenance by maintenance personnel resulting in a sticking carburetor float. Inadequate planning by the pilot in command during the approach is a factor in the accident.
- [NTSB FTW90DRA05](https://openairdocs.org/ntsb/FTW90DRA05.md): Grumman 164-B · Garwood, TX · Accident · No injuries · Final report · May 25, 1990 · N9982 · Destroyed
  > The power loss due to super charger impeller failure.
- [NTSB DEN90FA115](https://openairdocs.org/ntsb/DEN90FA115.md): Aerospatiale SA315B · La Sal, UT · Accident · Serious injuries · Field investigation · Final report · May 23, 1990 · N402AH · Substantial damage
  > A failure of the engine speed governor unit due to improper storage and/or inspection of the speed governor unit prior to placing it in service. A factor in the accident was the pilot carrying passengers on the external load.
- [NTSB LAX90LA175](https://openairdocs.org/ntsb/LAX90LA175.md): Piper PA23-160 · Flagstaff, AZ · Accident · No injuries · Limited investigation · Final report · May 15, 1990 · N4232P · Substantial damage
  > The failure of the pilot to maintain directional control and to feather the propeller. A factor was erratic power from the left engine due to the jamming of the fuel selector valve in an intermediate position.
- [NTSB ATL90FA111](https://openairdocs.org/ntsb/ATL90FA111.md): Cessna P206 · Liberty, NC · Accident · 1 fatal · Field investigation · Final report · May 9, 1990 · N220P · Substantial damage
  > A loss of engine power due to improper repairs to, and inadequate inspection of, the induction air box. The night light condition was a contributing factor.
- [NTSB DEN90LA106](https://openairdocs.org/ntsb/DEN90LA106.md): Cessna 337 · Broomfield, CO · Accident · No injuries · Limited investigation · Final report · May 6, 1990 · N2208X · Substantial damage
  > The pilot's failure to properly execute a precautionary approach following an engine failure.
- [NTSB FTW90DRD07](https://openairdocs.org/ntsb/FTW90DRD07.md): Grumman G-164A · Ville Platte, LA · Accident · No injuries · Final report · May 2, 1990 · N8938H · Destroyed
  > Partial loss of engine power due to a cracked number four cylinder intake rocker box housing. The lack of a suitable forced landing site was a related factor.
- [NTSB LAX90LA155](https://openairdocs.org/ntsb/LAX90LA155.md): Enstrom F28F · Corona, CA · Accident · No injuries · Limited investigation · Final report · Apr 27, 1990 · N756H · Substantial damage
  > The partial failure of the engine's right magneto, which resulted in a loss of engine power.
- [NTSB FTW90DRD05](https://openairdocs.org/ntsb/FTW90DRD05.md): Schweizer G-164B · Reeves, LA · Accident · No injuries · Final report · Apr 13, 1990 · N48455 · Substantial damage
  > Loss of engine power due to a frozen rocker arm.
- [NTSB MKC90LA084](https://openairdocs.org/ntsb/MKC90LA084.md): Aeronca 7AC · Branson, MO · Accident · No injuries · Limited investigation · Final report · Apr 12, 1990 · N84055 · Substantial damage
  > A disconnected throttle linkage that was inadequately inspected.
- [NTSB FTW90FA091](https://openairdocs.org/ntsb/FTW90FA091.md): Luscombe 8-A · Baytown, TX · Accident · 1 fatal · Field investigation · Final report · Apr 7, 1990 · N1410K · Destroyed
  > The pilot's inadvertent stall of the airplane while maneuvering after a partial power loss during initial climb and a partially blocked exhaust system which had been inadequately maintained.
- [NTSB MIA90LA097](https://openairdocs.org/ntsb/MIA90LA097.md): Cessna 150L · Vieques, PR · Accident · No injuries · Limited investigation · Final report · Mar 30, 1990 · N19599 · Substantial damage
  > Failure of packing around the carburetor accelerator pump, which had jammed throttle movement and would not allow an increase in engine RPM above idle.
- [NTSB SEA90FA057](https://openairdocs.org/ntsb/SEA90FA057.md): Cessna 170 · Republic, WA · Accident · 2 fatal · Field investigation · Final report · Mar 25, 1990 · N4130V · Destroyed
  > Improper inspection and airworthiness certification of the aircraft on the last annual inspection by an FAA authorized repair station, the inadequate engine performance and low cylinder compression, and the pilots attempt to takeoff with known aircraft…
- [NTSB ATL90IA087](https://openairdocs.org/ntsb/ATL90IA087.md): Mooney M-20L · Augusta, GA · Incident · No injuries · Incident investigation · Final report · Mar 25, 1990 · N1024Z · Minor damage
  > The reported performance problem during climbout was undetermined. The pilot's decision to land with the landing gear retracted contributed to the minor damage sustained.
- [NTSB MIA90LA092](https://openairdocs.org/ntsb/MIA90LA092.md): Talmadge Scott Longez · St. Petersburg, FL · Accident · Minor injuries · Limited investigation · Final report · Mar 18, 1990 · N83TS · Substantial damage
  > The failure of maintenance personnel to properly secure the carburetor throttle cable housing.
- [NTSB MKC90LA067](https://openairdocs.org/ntsb/MKC90LA067.md): Grumman AG-CAT G-164A · Parkin, AR · Accident · No injuries · Limited investigation · Final report · Mar 17, 1990 · N5336 · Substantial damage
  > Total failure of the engine's master connecting rod.
- [NTSB MKC90LA065](https://openairdocs.org/ntsb/MKC90LA065.md): Piper PA-28-140 · Herington, KS · Accident · Minor injuries · Limited investigation · Final report · Mar 16, 1990 · N8285N · Substantial damage
  > Failure of the #2 exhaust valve, and improper flare by the pilot during the forced landing.
- [NTSB ATL90FA071](https://openairdocs.org/ntsb/ATL90FA071.md): Piper PA-28-151 · Creola, AL · Accident · Serious injuries · Field investigation · Final report · Mar 4, 1990 · N991DB · Substantial damage
  > The pilot's failure to assure that proper maintenance and inspection of the aircraft were completed before flight.
- [NTSB SEA90LA044](https://openairdocs.org/ntsb/SEA90LA044.md): Ransome Pitts Special S-1C · Troutdale, OR · Accident · Serious injuries · Limited investigation · Final report · Feb 24, 1990 · N3T · Destroyed
  > Inadequate maintenance which resulted in a loss of engine power during the initial climb shortly after takeoff.
- [NTSB FTW90LA071](https://openairdocs.org/ntsb/FTW90LA071.md): Piper PA-28-140 · Rayne, LA · Accident · Minor injuries · Limited investigation · Final report · Feb 13, 1990 · N1785T · Substantial damage
  > Failure of the #3 exhaust valve, which necessitated a forced landing on unsuitable terrain.
- [NTSB FTW90LA064](https://openairdocs.org/ntsb/FTW90LA064.md): Piper PA-28-140 · Roanoke, TX · Accident · Minor injuries · Limited investigation · Final report · Feb 5, 1990 · N33052 · Substantial damage
  > The partial power loss due to a failed exhaust valve and the failure of the pilot to maintain adequate speed during the precautionary landing approach.
- [NTSB NYC90LA064](https://openairdocs.org/ntsb/NYC90LA064.md): Mooney M20-K · Gibsonia, PA · Accident · No injuries · Limited investigation · Final report · Jan 31, 1990 · N1149G · Substantial damage
  > The collision with rods in the field as the pilot was attempting a forced landing after a complete engine failure.
- [NTSB DEN90LA044](https://openairdocs.org/ntsb/DEN90LA044.md): Cessna 182 · Frederick, CO · Accident · No injuries · Limited investigation · Final report · Jan 16, 1990 · N5310B · Substantial damage
  > A partial engine power loss induced by stuck intake valves. Contributing to the accident was the inadequate maintenance of the airplane and the unsuitable terrain in which the forced landing was performed.
- [NTSB MIA90LA052](https://openairdocs.org/ntsb/MIA90LA052.md): Cessna 210M · Ocala, FL · Accident · No injuries · Limited investigation · Final report · Jan 12, 1990 · N9064M · Substantial damage
  > Separation of the throttle plate, due to improper securing of the attach screws during an overhaul.
- [NTSB LAX90LA057](https://openairdocs.org/ntsb/LAX90LA057.md): Beech 33 · Gorman, CA · Accident · Minor injuries · Limited investigation · Final report · Dec 27, 1989 · N875R · Substantial damage
  > The malfunctioning propeller governor, and the pilot's misjudgement of altitude and distance of the approach path during an emergency landing. Factors contributing to the accident were: the power lines across the approach path to the runway and the…
- [NTSB ATL90FA040](https://openairdocs.org/ntsb/ATL90FA040.md): Cessna 182 · Cincinnati, OH · Accident · 1 fatal · Field investigation · Final report · Dec 17, 1989 · N8940T · 2 aircraft · Substantial damage
  > Failure of the Cessna pilot to remain clear of the helicopter after experiencing a partial power loss.
- [NTSB LAX90LA050](https://openairdocs.org/ntsb/LAX90LA050.md): Hughes 369HS · Waimea, HI · Accident · No injuries · Limited investigation · Final report · Dec 9, 1989 · N9161F · Substantial damage
  > The improper installation of the pc tube by company maintenance personnel, which resulted in fatigue failure of the tube due to induced bending stresses.
- [NTSB NYC90LA035](https://openairdocs.org/ntsb/NYC90LA035.md): Beech B-23 · Tinton Falls, NJ · Accident · No injuries · Limited investigation · Final report · Nov 27, 1989 · N2350L · Substantial damage
  > Precautionary landing in unsuitable terrain following a partial power loss due to a failed exhaust valve.
- [NTSB MIA90LA030](https://openairdocs.org/ntsb/MIA90LA030.md): Cessna 177RG · Mims, FL · Accident · No injuries · Limited investigation · Final report · Nov 21, 1989 · N7628V · Substantial damage
  > A worn throttle control assembly that had failed.
- [NTSB LAX90DVG01](https://openairdocs.org/ntsb/LAX90DVG01.md): Schweizer G-164B · Grimes, CA · Accident · No injuries · Final report · Nov 16, 1989 · N3633Q · Substantial damage
  > Failure of the counter weight bracket to the propeller assembly.
- [NTSB ANC90FA010](https://openairdocs.org/ntsb/ANC90FA010.md): Cessna A185E · Anchorage, AK · Accident · No injuries · Field investigation · Final report · Nov 7, 1989 · N1592F · Substantial damage
  > The throttle control linkage became disconnected on the first flight after an annual inspection due to improper maintenance. Darkness and high vegetation were contributing factors.

Next page: https://openairdocs.org/ntsb.md?occurrence=352&page=17

## 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=16

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