# NTSB investigations: Amateur-built UNKNOWN ENG, 1999

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 IAD00LA014](https://openairdocs.org/ntsb/IAD00LA014.md): Prudhomme Velocity RG 173 · Richmond, VA · Accident · Minor injuries · Limited investigation · Final report · Dec 26, 1999 · N242JP · Substantial damage
  > the improper installation of the oil supply line to the propeller governor which resulted in a loss of lubrication, overtemperature, and a loss of engine power.
- [NTSB FTW00LA045](https://openairdocs.org/ntsb/FTW00LA045.md): Cartercopters Cartercopter · Olney, TX · Accident · No injuries · Limited investigation · Final report · Dec 16, 1999 · N121CC · Substantial damage
  > The pilot's failure to maintain rotor rpm during takeoff, which resulted in a hard landing following the aborted takeoff.
- [NTSB LAX00LA034](https://openairdocs.org/ntsb/LAX00LA034.md): Hawker Siddeley Hunter T MK 7 · Mesa, AZ · Accident · Serious injuries · Limited investigation · Final report · Nov 17, 1999 · N576NL · Substantial damage
  > The fatigue failure and separation the stage 3 compressor blades due to corrosion pitting of the blade retention lug bores. A factor in the accident was the failure of the various post military surplus operators of this engine to incorporate the…
- [NTSB IAD00LA005](https://openairdocs.org/ntsb/IAD00LA005.md): Ankenbruck SEA Hawk · Somerset, PA · Accident · No injuries · Limited investigation · Final report · Nov 12, 1999 · N101WR · Substantial damage
  > The pilot's improper preflight which resulted in a loss of power due to contaminated fuel, and the pilot's failure to maintain aircraft control after the loss of power. A factor in the accident was fuel contamination.
- [NTSB SEA00IA007](https://openairdocs.org/ntsb/SEA00IA007.md): Cessna 172P · Wenatchee, WA · Incident · No injuries · Incident investigation · Final report · Oct 23, 1999 · N54844 · 2 aircraft · Minor damage
  > The failure of the pilots in both aircraft to maintain an adequate visual lookout. Haze was a factor.
- [NTSB FTW00LA017](https://openairdocs.org/ntsb/FTW00LA017.md): Wright Avid Flyer Mark IV · Seabrook, TX · Accident · No injuries · Limited investigation · Final report · Oct 23, 1999 · N583AF · Substantial damage
  > The pilot's failure to maintain directional control during a downwind landing. Factors were his improper weather evaluation, the prevailing tailwind, and the engine vibration.
- [NTSB LAX00LA023](https://openairdocs.org/ntsb/LAX00LA023.md): Luhnau BD-5B · Boulder City, NV · Accident · 1 fatal · Limited investigation · Final report · Oct 22, 1999 · N62765 · Substantial damage
  > The pilot's failure to secure an electrical wire terminal in the propeller pitch control circuit following a maintenance adjustment, which resulted in the propeller malfunctioning and going to a flat pitch. The flat pitch of the propeller produced a high drag…
- [NTSB LAX00LA011](https://openairdocs.org/ntsb/LAX00LA011.md): Waco UPF7 · Jean, NV · Accident · No injuries · Limited investigation · Final report · Oct 17, 1999 · N32186 · 2 aircraft · Minor damage
  > The pilot of the other airplane's failure to maintain an adequate visual lookout while taxiing for departure. Factors in the accident were: the narrow nature of the taxiway and the pilot of the other airplane's subsequent inability to S-turn for better…
- [NTSB LAX00LA015](https://openairdocs.org/ntsb/LAX00LA015.md): Airbus Industrie A-320-231 · Phoenix, AZ · Accident · No injuries · Limited investigation · Final report · Oct 15, 1999 · N627AW · Substantial damage
  > The airline's failure to fully review the obstruction clearances and revise the pushback procedures in an area of the ramp where new construction had impinged on the available ramp space. Also causal was the failure of the tug driver and the wing walkers to…
- [NTSB FTW00LA006](https://openairdocs.org/ntsb/FTW00LA006.md): WSK PZL Mielec M18 · Weldon, AR · Accident · 1 fatal · Limited investigation · Final report · Oct 5, 1999 · N4779G · Destroyed
  > The cause of the accident was undetermined.
- [NTSB LAX99LA323](https://openairdocs.org/ntsb/LAX99LA323.md): Airbus Industrie A-320-231 · Beatty, NV · Accident · Serious injuries · Limited investigation · Final report · Sep 17, 1999 · N628AW · No damage
  > the failure of the injured passengers to remain seated with their seat belts fastened as directed by the captain.
- [NTSB LAX99LA304](https://openairdocs.org/ntsb/LAX99LA304.md): Glover Teenie TWO · Chino, CA · Accident · Minor injuries · Limited investigation · Final report · Sep 12, 1999 · N925SG · Destroyed
  > The in-flight separation and loss of the carburetor fuel jet resulting from the pilot's improper installation of the component. Also causal was the pilot's failure to maintain an adequate airspeed margin following the loss of power, which resulted in an…
- [NTSB NYC99LA221](https://openairdocs.org/ntsb/NYC99LA221.md): Valenza Volksplane VP-II · Westmore, VT · Accident · 1 fatal · Limited investigation · Final report · Sep 6, 1999 · N8535B · Destroyed
  > The pilot's failure to maintain adequate altitude/clearance from the trees. A related factor was the pilot's lack of familiarity with the airplane.
- [NTSB LAX99LA298](https://openairdocs.org/ntsb/LAX99LA298.md): Lithuanian Factory of LAK-12 · Prescott, AZ · Accident · No injuries · Limited investigation · Final report · Sep 5, 1999 · N612LK · Substantial damage
  > The pilot's failure to maintain an adequate clearance from ground obstructions during an off-airport landing. The pilot's inability to locate suitable thermal activity to remain aloft is a factor in the accident.
- [NTSB IAD99WA062](https://openairdocs.org/ntsb/IAD99WA062.md): Learjet 35A · Adwa, Ethiopia · Accident · 2 fatal · Foreign investigation · Aug 29, 1999 · N350JF · Destroyed
- [NTSB NYC99LA215](https://openairdocs.org/ntsb/NYC99LA215.md): Let L-33-SOLO · Wellington, OH · Accident · No injuries · Limited investigation · Final report · Aug 28, 1999 · N286BA · Substantial damage
  > The pilot's failure to attain the proper touchdown point. A factor related to the accident was a downdraft.
- [NTSB SEA99FA146](https://openairdocs.org/ntsb/SEA99FA146.md): Republic RC-3 · Chimacum, WA · Accident · 2 fatal · Field investigation · Final report · Aug 23, 1999 · N6070K · Destroyed
  > The inadequate visual lookout by both the pilot-in-command and second pilot, and the pilot-in-command's failure to maintain sufficient flying speed to prevent a stall condition. Contributing factors were the transmission lines, gusty wind conditions, and the…
- [NTSB CHI99FA263](https://openairdocs.org/ntsb/CHI99FA263.md): Underwood Brokaw Bullet · Oshkosh, WI · Accident · No injuries · Field investigation · Final report · Jul 29, 1999 · N331TB · Substantial damage
  > the pilot failed to maintain directional control of the airplane.
- [NTSB CHI99LA200](https://openairdocs.org/ntsb/CHI99LA200.md): Gillmore Benson B&M · Greencastle, IN · Accident · Serious injuries · Limited investigation · Final report · Jun 26, 1999 · N2152G · Substantial damage
  > the failure of the cyclic control rod. Factors were aircraft control not possible for the pilot.
- [NTSB NYC99LA148](https://openairdocs.org/ntsb/NYC99LA148.md): Adams Rotorway EXEC-90 · Evington, VA · Accident · No injuries · Limited investigation · Final report · Jun 13, 1999 · N8235W · Substantial damage
  > The pilot's selection of unsuitable terrain for a run on landing. A factor was the dirt bank.
- [NTSB SEA99LA081](https://openairdocs.org/ntsb/SEA99LA081.md): D. Wayne Smith Wayncraft 14 · Libby, MT · Accident · 1 fatal · Limited investigation · Final report · Jun 6, 1999 · N58WS · Substantial damage
  > Collision with terrain for undetermined reasons.
- [NTSB IAD99LA047](https://openairdocs.org/ntsb/IAD99LA047.md): Nanchang CJ-6A · Ocean City, MD · Accident · Serious injuries · Limited investigation · Final report · May 30, 1999 · N4MF · No damage
  > Was the pilot leaving the magneto switch in the on position while hand rotating the propeller.
- [NTSB SEA99LA071](https://openairdocs.org/ntsb/SEA99LA071.md): Ben Travis Kitfox IV · Carnation, WA · Accident · No injuries · Limited investigation · Final report · May 25, 1999 · N149BT · Substantial damage
  > Loss of engine power due to a cracked engine impulse line, which disabled the fuel pump. A factor was the intentional ground loop by the pilot.
- [NTSB SEA99LA061](https://openairdocs.org/ntsb/SEA99LA061.md): Eugene Hughes Lancair IV · Butte, MT · Accident · No injuries · Limited investigation · Final report · May 8, 1999 · N124GH · Substantial damage
  > The pilot's improper flare.
- [NTSB LAX99LA170](https://openairdocs.org/ntsb/LAX99LA170.md): Wsk Pzl Warzawa-Okecie PZL-104 Wilga 80 · Reno, NV · Accident · No injuries · Limited investigation · Final report · May 6, 1999 · N4UU · Substantial damage
  > The flight instructor's improper supervision of the pilot trainee and his failure to make timely control inputs in order to maintain aircraft control.
- [NTSB LAX99LA167](https://openairdocs.org/ntsb/LAX99LA167.md): Massey Super Stallion · Shafter, CA · Accident · No injuries · Limited investigation · Final report · Apr 30, 1999 · N6143E · Substantial damage
  > The pilot's decision to attempt a landing with insufficient runway remaining to stop the airplane.
- [NTSB DEN99LA068](https://openairdocs.org/ntsb/DEN99LA068.md): Weatherly 201-C · Two Buttes, CO · Accident · No injuries · Limited investigation · Final report · Apr 28, 1999 · N9095W · Substantial damage
  > The pilot's selection of an unsuitable landing area. Factors associated with the accident were an unknown object in the landing area, a failure of a main landing gear tire, and the pilot's inadvertent ground loop/swerve.
- [NTSB MIA99FA108](https://openairdocs.org/ntsb/MIA99FA108.md): Pushkar Hornet · Fort Lauderdale, FL · Accident · 1 fatal · Field investigation · Final report · Mar 20, 1999 · N4376N · Destroyed
  > the pilot's (owner/builder) inadvertent aerodynamic stall of the airplane after a total loss of engine power. Factors were the pilot's improper maintenance action and his lack of total experience in the airplane type.
- [NTSB NYC99LA072](https://openairdocs.org/ntsb/NYC99LA072.md): Miner Rotorway Exec 162F · Mechanicsburg, PA · Accident · Minor injuries · Limited investigation · Final report · Mar 14, 1999 · N124CF · Substantial damage
  > The pilot's inadvertent induced dynamic rollover. A factor in the accident was the pilot's lack of helicopter experience.
- [NTSB CHI99IA100](https://openairdocs.org/ntsb/CHI99IA100.md): McDonnell Douglas DC-10 · Salina, KS · Incident · No injuries · Incident investigation · Final report · Mar 2, 1999 · N40061 · 2 aircraft · No damage
  > The ARTCC personnel failed to maintain radio communications with both airplanes and failed to maintain IFR separation standards. Factors relating to the incident were the FAA does not require cargo airplanes to be equipped with TCAS and neither airplane was…
- [NTSB CHI99LA099](https://openairdocs.org/ntsb/CHI99LA099.md): Calkins Kitfox 5 · Waunakee, WI · Accident · No injuries · Limited investigation · Final report · Mar 1, 1999 · N394GL · Destroyed
  > the fracture of the trim actuator.
- [NTSB NYC99IA062](https://openairdocs.org/ntsb/NYC99IA062.md): Airbus Industrie A-320-231 · Columbus, OH · Incident · No injuries · Incident investigation · Final report · Feb 16, 1999 · N628AW · Minor damage
  > a failure of the external o-rings in the nose landing gear steering module.
- [NTSB IAD99LA030](https://openairdocs.org/ntsb/IAD99LA030.md): WSK PZL Krosno KR-03A · Kutztown, PA · Accident · Minor injuries · Limited investigation · Final report · Feb 10, 1999 · N210C · Substantial damage
  > was the in-flight encounter with thermal sink over unsuitable terrain for landing.
- [NTSB LAX99LA089](https://openairdocs.org/ntsb/LAX99LA089.md): Stern Rotorway Exec 162F · Tucson, AZ · Accident · Minor injuries · Limited investigation · Final report · Feb 5, 1999 · N88XS · Substantial damage
  > The sudden development of a wind gust which resulted in the pilot losing control, and the helicopter's dynamic rollover when a skid contacted the ground.

## 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") = 1999
  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=1999

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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.