# NTSB investigations: Amateur-built UNKNOWN ENG, 1991

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 DEN92IA014](https://openairdocs.org/ntsb/DEN92IA014.md): Cessna 172RG · Broomfield, CO · Incident · No injuries · Incident investigation · Final report · Dec 5, 1991 · N9320D · Minor damage
  > Failure of the left main landing gear pivot assembly due to ductile torsional overstress.
- [NTSB NYC91LA247](https://openairdocs.org/ntsb/NYC91LA247.md): Mcdonnell Douglas MD-82 · East Boston, MA · Accident · Serious injuries · Limited investigation · Final report · Sep 28, 1991 · N819NY · Minor damage
  > The malfunction of an electrical component in the cockpit, which resulted in smoke and the subsequent emergency evacuation of the passengers from the airplane.
- [NTSB ATL91LA165](https://openairdocs.org/ntsb/ATL91LA165.md): Icard, Claude M. Sonerai II LT · Morganton, NC · Accident · Serious injuries · Limited investigation · Final report · Aug 31, 1991 · N9QC · Substantial damage
  > The pilot's failure to maintain directional control of the airplane on the runway, and the inadvertent rotation of the airplane, resulting in an unplanned flight.
- [NTSB CHI91LA263](https://openairdocs.org/ntsb/CHI91LA263.md): Beech 36 · Davenport, IA · Accident · No injuries · Limited investigation · Final report · Aug 15, 1991 · N25496 · 2 aircraft · Substantial damage
  > The inadequate visual lookout and poor inflight planning and decision making by the pilot of N97867. Factors in the accident are inoperative exterior lights and radio communication not possible.
- [NTSB NYC91DNC04](https://openairdocs.org/ntsb/NYC91DNC04.md): Laurent A. Cloutier BD-5B · Gilford, NH · Accident · Minor injuries · Final report · Aug 3, 1991 · N245BD · Substantial damage
  > Engine failure due to a faulty oil pressure relief valve resulting in an emergency landing on unsuitable terrain.
- [NTSB FTW91FA123](https://openairdocs.org/ntsb/FTW91FA123.md): Hughes 269B · Brickeys, AR · Accident · 1 fatal · Field investigation · Final report · Jul 18, 1991 · N11XC · Destroyed
  > The failure of the clutch control cable due to fraying which initiated the forced landing and the operator's failure to perform recommended inspections on the aircraft. Factors were the pilot's failure to maintain rotor RPM and the unsuitable terrain.
- [NTSB CHI91LA214](https://openairdocs.org/ntsb/CHI91LA214.md): Ercoupe 415-C · Sparta, MI · Accident · No injuries · Limited investigation · Final report · Jul 5, 1991 · N87169 · Substantial damage
  > Inadequate preflight by the pilot and the pilot's failure to reach a proper touchdown point.
- [NTSB ATL91FA117](https://openairdocs.org/ntsb/ATL91FA117.md): Fuji LM 1 · Keystone Hghts, FL · Accident · 2 fatal · Field investigation · Final report · Jun 29, 1991 · N2109L · 2 aircraft · Destroyed
  > Failure of the number four pilot (in N2100J) to maintain adequate visual lookout and/or clearance from the number three aircraft (N2109L).
- [NTSB CHI91DEP10](https://openairdocs.org/ntsb/CHI91DEP10.md): Allan R. Goldman Dragonfly · Kenosha, WI · Accident · No injuries · Final report · Jun 16, 1991 · N222TH · Substantial damage
  > Inadequate aircraft design and insufficient information regarding wing versus canard angle for an amateur built aircraft.
- [NTSB CHI91DEP06](https://openairdocs.org/ntsb/CHI91DEP06.md): Avid Flyer Avid Flyer · Endeavor, WI · Accident · No injuries · Final report · Jun 7, 1991 · N369AF · Substantial damage
  > The pilot in command's inability to effectively eliminate carburetor ice to avoid an emergency landing.
- [NTSB NYC91LA143](https://openairdocs.org/ntsb/NYC91LA143.md): Cessna 120 · Wellsville, PA · Accident · No injuries · Limited investigation · Final report · May 28, 1991 · N2714N · Substantial damage
  > A power loss due to a fuel system blockage which resulted in a forced landing.
- [NTSB NYC91DGT04](https://openairdocs.org/ntsb/NYC91DGT04.md): George E Heide, JR. Moni Motorglider · Annville, PA · Accident · No injuries · Final report · May 20, 1991 · N107GH · Substantial damage
  > The pilot's intentional landing on unsuitable terrain due to a loss of altitude precipitated by a downdraft.
- [NTSB SEA91LA106](https://openairdocs.org/ntsb/SEA91LA106.md): Beech A36 · Rawlins, WY · Accident · No injuries · Limited investigation · Final report · May 16, 1991 · N6724T · Substantial damage
  > The pilot's lack of familiarity with the aircraft, his lack of understanding of the electrical system, and a premature precautionary landing. Contributing to the accident were an alternator failure and the resultant false readings of the powerplant…
- [NTSB ATL91LA093](https://openairdocs.org/ntsb/ATL91LA093.md): Cessna 172I · Clanton, AL · Accident · Minor injuries · Limited investigation · Final report · May 14, 1991 · N46240 · Substantial damage
  > Failure of the pilot to maintain control of the aircraft during a go-around. The pilot's lack of experience was a related factor.
- [NTSB MIA91LA127](https://openairdocs.org/ntsb/MIA91LA127.md): Travel Air 2000 · Homestead, FL · Accident · No injuries · Limited investigation · Final report · Apr 27, 1991 · N1572 · Substantial damage
  > An on ground encounter with weather conditions that were favorable for carburetor icing at a low power setting (glide power), and failure of the pilot to abort the takeoff after recognizing that the eng was not developing full power during the initial climb.
- [NTSB SEA91LA092](https://openairdocs.org/ntsb/SEA91LA092.md): Smelser KR-2 · Spokane, WA · Accident · Minor injuries · Limited investigation · Final report · Apr 20, 1991 · N570TS · Substantial damage
  > A failure of the fuel drain valve which resulted in fuel exhaustion and a loss of engine power.
- [NTSB LAX91LA175](https://openairdocs.org/ntsb/LAX91LA175.md): Snider RV6 · Paulden, AZ · Accident · Serious injuries · Limited investigation · Final report · Apr 16, 1991 · N2165U · Substantial damage
  > The pilot's poor preflight preparation and his failure to ensure that the fuel selector was properly positioned for flight.
- [NTSB SEA91LA083](https://openairdocs.org/ntsb/SEA91LA083.md): Aeronca 11AC · Port Orchard, WA · Accident · No injuries · Limited investigation · Final report · Apr 12, 1991 · N85948 · Substantial damage
  > The loss of engine power due to contaminated fuel system.
- [NTSB ATL91LA076](https://openairdocs.org/ntsb/ATL91LA076.md): David Lowe ULTRA-PUP · Waycross, GA · Accident · No injuries · Limited investigation · Final report · Apr 3, 1991 · N71427 · Substantial damage
  > The failure of the airplane battery, which prohibited the complete extension of the landing gear, resulting in a landing with the nose gear retracted. A factor in the accident was the soft terrain at the selected landing area.
- [NTSB LAX91LA120](https://openairdocs.org/ntsb/LAX91LA120.md): Boeing A75 · Marana, AZ · Accident · No injuries · Limited investigation · Final report · Mar 2, 1991 · N803RB · 2 aircraft · Substantial damage
  > The failure of the pilot in the trailing airplane to maintain clearance from the lead airplane.

## 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") = 1991
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('99999'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=99999&year=1991

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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.