# NTSB investigations, 1998: 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 FTW99LA036](https://openairdocs.org/ntsb/FTW99LA036.md): Piper PA-28-160 · Greenville, TX · Accident · Serious injuries · Limited investigation · Final report · Nov 25, 1998 · N5087W · Minor damage
  > The partial loss of engine power due to a blocked muffler exhaust pipe/manifold as a result of a loose internal baffle. Factors were the improper maintenance by other maintenance personnel and the lack of suitable terrain for the forced landing.
- [NTSB ATL99FA011](https://openairdocs.org/ntsb/ATL99FA011.md): Piper PA-32R-300 · Roswell, GA · Accident · 1 fatal · Field investigation · Final report · Oct 28, 1998 · N8554C · Destroyed
  > A loss of engine power due to the failure of the number five connecting rod assembly as a result of fatigue cracks that were initiated in areas of galling. A factor was the lack of suitable terrain for a forced landing.
- [NTSB DEN99LA015](https://openairdocs.org/ntsb/DEN99LA015.md): Mooney M20C · Englewood, CO · Accident · Serious injuries · Limited investigation · Final report · Oct 21, 1998 · N6405U · Substantial damage
  > The undertorquing of the camshaft gear retaining bolts during engine overhaul by maintenance personnel. A factor was the unsuitable terrain for a forced landing.
- [NTSB LAX99LA007](https://openairdocs.org/ntsb/LAX99LA007.md): Cessna 190 · Lost Hills, CA · Accident · Minor injuries · Limited investigation · Final report · Oct 10, 1998 · N1087D · Substantial damage
  > A loss of engine power due to fatigue failure of the number 4 cylinder articulating rod.
- [NTSB MIA99FA005](https://openairdocs.org/ntsb/MIA99FA005.md): Boeing 727-224 · Miami, FL · Accident · No injuries · Field investigation · Final report · Oct 7, 1998 · N66734 · Substantial damage
  > The catastrophic failure of the 8th stage high pressure compressor disk from cadmium embrittlement as a result of improper adherence to the prescribed plating procedures and requirements by the company that last plated the disk. Contributing to the accident…
- [NTSB CHI98LA366](https://openairdocs.org/ntsb/CHI98LA366.md): Beech BE-35 · Point Lookout, MO · Accident · No injuries · Limited investigation · Final report · Sep 29, 1998 · N8946M · Substantial damage
  > The pilot's continued flight with a known deficiency in equipment. Contributing to the accident was the maintenance adjustment that was not completed by the mechanic.
- [NTSB MIA98FA250](https://openairdocs.org/ntsb/MIA98FA250.md): Piper Aerostar 600 · N. Myrtle Beach, SC · Accident · 5 fatal · Field investigation · Final report · Sep 20, 1998 · N17MT · Destroyed
  > The pilot's failure to maintain airspeed (Vs) during a single engine approach resulting in an inadvertent stall. Factors contributing to the accident were a fatigue crack in the exhaust pipe in the right engine, the aircraft weight and balance was exceeded,…
- [NTSB FTW98LA404](https://openairdocs.org/ntsb/FTW98LA404.md): Piper PA-28RT-201T · Duck Creek, UT · Accident · No injuries · Limited investigation · Final report · Sep 18, 1998 · N8252S · Substantial damage
  > Loose intake valve rocker arm studs that allowed a loss of compression and a loss of oil. A factor was unsuitable terrain on which to make a forced landing and poles next to a cattle guard.
- [NTSB CHI98TA354](https://openairdocs.org/ntsb/CHI98TA354.md): Bell 206B-3 · Hinkley, MN · Accident · No injuries · Final report · Sep 12, 1998 · N52BH · Substantial damage
  > Loss of engine power due to failure of the engine governor.
- [NTSB FTW98LA385](https://openairdocs.org/ntsb/FTW98LA385.md): Jobe'S TE-1 · Alamogordo, NM · Accident · Serious injuries · Limited investigation · Final report · Sep 6, 1998 · N6EZ · Destroyed
  > The improper maintenance procedures (failure to preserve the engine during numerous storage periods over 30 days) and the lack of suitable terrain for a forced landing. Factors were the pilot's lack of experience in type of aircraft and the high density…
- [NTSB NYC98FA179](https://openairdocs.org/ntsb/NYC98FA179.md): Smith, Ted Aerostar TS-600 · Marietta, PA · Accident · 1 fatal · Field investigation · Final report · Sep 5, 1998 · N600JB · Destroyed
  > The failure of the pilot to maintain airspeed during a precautionary landing which resulted in a loss of control while operating with one engine shutdown. An additional cause was the improper maintenance procedures that resulted in the #5 cylinder not being…
- [NTSB CHI98LA355](https://openairdocs.org/ntsb/CHI98LA355.md): Air Tractor AT-401 · N. Ottawa Twp., MN · Accident · No injuries · Limited investigation · Final report · Aug 28, 1998 · N4543F · Destroyed
  > A loss of engine power due to a worn piston ring. A related factor was the owner exceeded the manufacturer's recommended engine overhaul.
- [NTSB FTW98LA367](https://openairdocs.org/ntsb/FTW98LA367.md): Aerospatiale SA315B · Naturita, CO · Accident · Minor injuries · Limited investigation · Final report · Aug 22, 1998 · N49525 · Substantial damage
  > Partial loss of engine power resulting from heat induced deterioration of the gas generator turbine. Factors were a forced landing in hilly unsuitable terrain containing mature trees.
- [NTSB ATL98LA115](https://openairdocs.org/ntsb/ATL98LA115.md): Schweizer G164B · Newton, MS · Accident · No injuries · Limited investigation · Final report · Aug 16, 1998 · N7502A · Substantial damage
  > The erosion of the compressor impeller and the unsecured fuel control unit resulted in the loss of engine power during the initial climb.
- [NTSB LAX98LA265](https://openairdocs.org/ntsb/LAX98LA265.md): Raymond C. Voegele Mini IMP RC-2 · Sonoma, CA · Accident · No injuries · Limited investigation · Final report · Aug 15, 1998 · N55961 · Substantial damage
  > A loss of power due to a loose magneto cap and a binding throttle control cable. The deficiencies were the result of the owner/pilot's improper installation and/or adjustments.
- [NTSB SEA98GA159](https://openairdocs.org/ntsb/SEA98GA159.md): Bell 212 · Juntura, OR · Accident · No injuries · Final report · Aug 8, 1998 · N291B · Substantial damage
  > The pilot-in-command's failure to maintain proper clearance between the long line cable and hell hole structure resulting in airframe contact and binding of the cable. This resulted in separation/disabling of the fuel control solenoid and a subsequent…
- [NTSB FTW98LA342](https://openairdocs.org/ntsb/FTW98LA342.md): Enstrom F-28F · Bryce Canyon, UT · Accident · No injuries · Limited investigation · Final report · Aug 4, 1998 · N8619M · Substantial damage
  > A partial loss of engine power due to an oil leak in the turbocharger system. Factors were high vegetation and high density altitude.
- [NTSB CHI98LA298](https://openairdocs.org/ntsb/CHI98LA298.md): Piper PA28-R-200 · W. Frankfort, IN · Accident · No injuries · Limited investigation · Final report · Aug 3, 1998 · N4596T · Substantial damage
  > The failure of the fuel mixture control linkage, and inadequate inspections by maintenance personnel.
- [NTSB LAX98LA250](https://openairdocs.org/ntsb/LAX98LA250.md): Cessna 177 · Corona, CA · Accident · Minor injuries · Limited investigation · Final report · Jul 29, 1998 · N177JH · Substantial damage
  > The loss of engine power due to a partially closed fuel shutoff valve as a result of improper maintenance installation.
- [NTSB LAX98LA244](https://openairdocs.org/ntsb/LAX98LA244.md): Bellanca BL-17 · Winnemucca, NV · Accident · Minor injuries · Limited investigation · Final report · Jul 26, 1998 · N14692 · Substantial damage
  > Loss of engine power due to a missing cotter key and jam nut, the use of an improper nonapproved part by other maintenance personnel, and failure to safety the installation which subsequently lead to a throttle/carburetor linkage disconnect.
- [NTSB ANC98LA109](https://openairdocs.org/ntsb/ANC98LA109.md): Enstrom F-28F · Skwentna, AK · Accident · No injuries · Limited investigation · Final report · Jul 25, 1998 · N8622U · Substantial damage
  > A loss of engine power due to a fractured number three cylinder intake manifold flange, and the pilot's inability to maintain the proper rate of descent during the autorotation flare. A contributing factor associated with the accident was the downwind…
- [NTSB NYC98LA152](https://openairdocs.org/ntsb/NYC98LA152.md): Piper PA-28-151 · Newport, NH · Accident · Minor injuries · Limited investigation · Final report · Jul 24, 1998 · N44438 · Destroyed
  > The seizure of the throttle shaft, due to the overhaul facilities' failure to insure all metal fragments had been removed from the carburetor before inserting the throttle shaft after reaming the throttle shaft bushings.
- [NTSB LAX98LA243](https://openairdocs.org/ntsb/LAX98LA243.md): Beech 35 · Temecula, CA · Accident · Minor injuries · Limited investigation · Final report · Jul 24, 1998 · N2720V · Destroyed
  > A partial loss of engine power due to a disconnected throttle linkage, which was the result of an inadequate maintenance installation/inspection.
- [NTSB CHI98LA264](https://openairdocs.org/ntsb/CHI98LA264.md): Grumman G-164 · Hoxie, KS · Accident · Minor injuries · Limited investigation · Final report · Jul 21, 1998 · N698Y · Substantial damage
  > the total failure of the engine's left magneto.
- [NTSB NYC98LA149](https://openairdocs.org/ntsb/NYC98LA149.md): Cessna 152 · Philippi, WV · Accident · No injuries · Limited investigation · Final report · Jul 20, 1998 · N69193 · Substantial damage
  > Was the failure of an exhaust valve. A factor in the accident was the unsuitable landing area encountered by the pilot.
- [NTSB CHI98LA257](https://openairdocs.org/ntsb/CHI98LA257.md): Piper PA-28-140 · Napoleon, MI · Accident · No injuries · Limited investigation · Final report · Jul 18, 1998 · N54R · Destroyed
  > the pilot inadequate pre-flight planning. Factors in this accident were the airplane's weight and balance limitations had been exceeded by the pilot and an improper top overhaul of the engine's cylinder by the mechanic.
- [NTSB MIA98FA200](https://openairdocs.org/ntsb/MIA98FA200.md): Piper PA-31-310 · Miami, FL · Accident · 1 fatal · Field investigation · Final report · Jul 17, 1998 · N7578L · Destroyed
  > The pilot's inadequate preflight inspection which led to fuel contamination and subsequent loss of engine power. Also causal was the pilot's failure to maintain single engine flying speed (VMC).
- [NTSB ANC98LA099](https://openairdocs.org/ntsb/ANC98LA099.md): Cessna 207 · King Salmon, AK · Accident · Minor injuries · Limited investigation · Final report · Jul 17, 1998 · N1763U · Substantial damage
  > The disconnection of the mixture control cable from the mixture control arm. Factors associated with this accident were the inadequate 100 hour inspections performed by company mechanics.
- [NTSB LAX98LA230](https://openairdocs.org/ntsb/LAX98LA230.md): Piper PA-18-150 · Hyampom, CA · Accident · No injuries · Limited investigation · Final report · Jul 12, 1998 · N6248R · Substantial damage
  > Inadequate annual inspection that resulted in a partial loss of engine power due to a missing bolt, nut, and cotter pin from the throttle/carburetor assembly.
- [NTSB SEA98LA103](https://openairdocs.org/ntsb/SEA98LA103.md): Casa BU-131 · Harrisburg, OR · Accident · No injuries · Limited investigation · Final report · Jun 17, 1998 · N1XW · Substantial damage
  > A failed bracket attaching the throttle linkage, which resulted in the inability to control power, and unsuitable terrain for a successful forced landing. Factors include soft terrain with high vegetation.
- [NTSB ATL98LA084](https://openairdocs.org/ntsb/ATL98LA084.md): Bellanca 17-31A · Millry, AL · Accident · No injuries · Limited investigation · Final report · Jun 15, 1998 · N39853 · Substantial damage
  > The fracture of the #2 cylinder connecting rod which resulted in partial loss of engine power and subsequent forced landing. A factor in the accident was the rough terrain.
- [NTSB FTW98LA259](https://openairdocs.org/ntsb/FTW98LA259.md): Ayres S2R · Watson, AR · Accident · No injuries · Limited investigation · Final report · Jun 5, 1998 · N4007Y · Substantial damage
  > The partial loss of engine power due to the disconnection of the propeller governor control as a result of the stripped threads on the propeller governor control push-pull rod. A factor was the lack of suitable terrain for the forced landing.
- [NTSB LAX98LA182](https://openairdocs.org/ntsb/LAX98LA182.md): Cessna 150M · Livermore, CA · Accident · Minor injuries · Limited investigation · Final report · Jun 4, 1998 · N704ZA · Substantial damage
  > The missing nut/cotter pin on the throttle attachment assembly which resulted in the pilot's inability to control engine power, and the hidden obstruction (hole) in the landing area. A factor was the high vegetation.
- [NTSB ANC98LA058](https://openairdocs.org/ntsb/ANC98LA058.md): Luscombe 8A · Paxson, AK · Accident · No injuries · Limited investigation · Final report · May 27, 1998 · N1322B · Substantial damage
  > A loss of engine power due to a failure of the engine's number 3 intake valve. A factor in the accident was the unsuitable terrain for a forced landing.
- [NTSB SEA98FA077](https://openairdocs.org/ntsb/SEA98FA077.md): Garlick UH-1H · Hope, ID · Accident · No injuries · Field investigation · Final report · May 19, 1998 · N98NW · Substantial damage
  > Failure of a misaligned main bearing in the engine. Factors include returning a previously unairworthy-tagged engine to service by the operator's maintenance personnel without sufficient information to identify and correct an unknown engine deficiency.
- [NTSB MIA98LA163](https://openairdocs.org/ntsb/MIA98LA163.md): Nanchang CJ-6A · Pageland, SC · Accident · Serious injuries · Limited investigation · Final report · May 16, 1998 · N158T · Substantial damage
  > Was the inadvertent stall of the airplane by the pilot-in-command while attempting to clear trees beneath the airplane during the descent for the forced landing. Contributing to the accident was the partial loss of engine power due to separation of the No.9…
- [NTSB LAX98LA159](https://openairdocs.org/ntsb/LAX98LA159.md): Bell 206B · Temecula, CA · Accident · No injuries · Limited investigation · Final report · May 15, 1998 · N90215 · Destroyed
  > A loss of engine power due to a deteriorated compressor air seal which resulted in the fracture and separation of several stator vanes. Deterioration was not detected as a result of an inadequate maintenance inspection frequency.
- [NTSB MIA98LA158](https://openairdocs.org/ntsb/MIA98LA158.md): David McElhannon Avid MK. 4 · Elberton, GA · Accident · No injuries · Limited investigation · Final report · May 11, 1998 · N117DK · Substantial damage
  > A loss of engine power due to a failed combustion assembly, expansion seal.
- [NTSB LAX98IA158](https://openairdocs.org/ntsb/LAX98IA158.md): North American NA265-65 · Palm Springs, CA · Incident · No injuries · Incident investigation · Final report · May 10, 1998 · N651MK · Minor damage
  > the fatigue failure and uncontained separation of the high pressure impeller in the No. 2 engine during the takeoff roll. While the impeller showed evidence of a subsurface fatigue origin, the percipient cause of the separation was not definitively determined.
- [NTSB MIA98LA159](https://openairdocs.org/ntsb/MIA98LA159.md): Piper PA-28-140 · Luvurne, AL · Accident · No injuries · Limited investigation · Final report · May 8, 1998 · N8218N · Substantial damage
  > The loss of engine power due to a leaking engine oil seal, resulting in a forced landing, and subsequent impact with the ground. A factor in this accident was improper maintenance and checks after rebuilding and reinstalling the airplane's engine.
- [NTSB FTW98LA198](https://openairdocs.org/ntsb/FTW98LA198.md): Cessna 172N · Parker, CO · Accident · No injuries · Limited investigation · Final report · Apr 25, 1998 · N6356D · Substantial damage
  > a fractured #1 exhaust valve rocker arm stud, which subsequently resulted in loss of engine power and a forced landing. The lack of suitable terrain in the forced landing area was a related factor.
- [NTSB LAX98LA139](https://openairdocs.org/ntsb/LAX98LA139.md): Bell 206B · Grand Canyon, AZ · Accident · No injuries · Limited investigation · Final report · Apr 20, 1998 · N8533F · Substantial damage
  > The malfunction and erratic speed control of the engine's governor, and the flight instructor's delayed remedial action.
- [NTSB FTW98FA186](https://openairdocs.org/ntsb/FTW98FA186.md): Foster/Hilsman Q2 · Siloam Springs, AR · Accident · 2 fatal · Field investigation · Final report · Apr 19, 1998 · N996DT · Destroyed
  > The pilot's failure to maintain aircraft control during the forced landing. Factors were the failure of the #4 cylinder head which resulted in a partial loss of engine power and the co-owners/builders' failure to perform a condition inspection of the…
- [NTSB MIA98LA130](https://openairdocs.org/ntsb/MIA98LA130.md): Starck Auriga · Collegedale, TN · Accident · 1 fatal · Limited investigation · Final report · Apr 11, 1998 · N311RS · Destroyed
  > A leak in the electric fuel boost pump caused by an improperly sized 'O' ring installation and the pilot's failure to maintain airspeed during an approach to a forced landing resulting in a stall.
- [NTSB FTW98TA152](https://openairdocs.org/ntsb/FTW98TA152.md): Bell OH-58C · Dulce, NM · Accident · Serious injuries · Final report · Mar 19, 1998 · N505JA · Substantial damage
  > The partial loss of engine power due to a disconnected bleed air line to the fuel controller and the unsuitable terrain for a forced landing. Factors were the loose B-nut, the inadequate maintenance by unknown personnel, insufficient standards/requirements…
- [NTSB SEA98LA046](https://openairdocs.org/ntsb/SEA98LA046.md): Cessna 152 · Mcminnville, OR · Accident · Minor injuries · Limited investigation · Final report · Mar 14, 1998 · N757CZ · Substantial damage
  > Disconnection of the throttle cable at the throttle-to-carburetor adapter plate and the failure of the student pilot to shut the aircraft's engine down once a safe landing was assured. Factors contributing to the accident were the soft terrain and overloading…
- [NTSB MIA98LA082](https://openairdocs.org/ntsb/MIA98LA082.md): Piper PA-28-140 · Graniteville, SC · Accident · No injuries · Limited investigation · Final report · Feb 20, 1998 · N3965K · Substantial damage
  > failure of the number three exhaust valve, which resulted in loss of engine power and a forced landing. Related factors were: the obstructions (earthen embankment and fence) in the emergency (forced) landing area.
- [NTSB ANC98FA019](https://openairdocs.org/ntsb/ANC98FA019.md): Cessna 207 · Homer, AK · Accident · 1 fatal · Field investigation · Final report · Feb 6, 1998 · N91029 · Destroyed
  > A fatigue failure, and partial separation of the number 6 engine cylinder head assembly, the operator's inadequate progressive inspection performed by company maintenance personnel, and the pilot's inadvertent stall during a maneuvering turn toward an…
- [NTSB MIA98LA066](https://openairdocs.org/ntsb/MIA98LA066.md): Cessna 152 · Ochopee, FL · Accident · Serious injuries · Limited investigation · Final report · Feb 1, 1998 · N94929 · Substantial damage
  > partial loss of engine power due to a fractured number 4 exhaust valve, which resulted in a forced landing; and the lack of sufficient airspeed to maneuver over power lines during an attempt to abort (go around from) an emergency landing, which resulted in an…
- [NTSB LAX98FA068](https://openairdocs.org/ntsb/LAX98FA068.md): Cessna 182P · Salinas, CA · Accident · 1 fatal · Field investigation · Final report · Jan 10, 1998 · N8158M · Destroyed
  > A loss of engine power due to a missing valve keeper. Also causal was the failure by engine maintenance personnel during engine top overhaul to install the second valve keeper in the No. 3 cylinder exhaust valve and the failure of inspection personnel to…

## 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") = 1998
  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=1998

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