# NTSB investigations: Amateur-built UNKNOWN ENG, 1998

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 LAX99LA060](https://openairdocs.org/ntsb/LAX99LA060.md): Aegerter, Simon Velocity 173E-RG · San Diego, CA · Accident · No injuries · Limited investigation · Final report · Dec 29, 1998 · N466MF · Substantial damage
  > The pilot's inadequate modification to the control systems, which resulted in a restricted elevator control.
- [NTSB MIA99FA043](https://openairdocs.org/ntsb/MIA99FA043.md): Cessna 402B · Pahokee, FL · Accident · 3 fatal · Field investigation · Final report · Dec 9, 1998 · N788SP · Substantial damage
  > The pilot's failure to maintain adequate altitude during the approach.
- [NTSB LAX99LA025](https://openairdocs.org/ntsb/LAX99LA025.md): de Havilland Tiger Moth DH 82A · Petaluma, CA · Accident · No injuries · Limited investigation · Final report · Nov 5, 1998 · N838KC · 2 aircraft · Substantial damage
  > Failure of the pilot in the Tiger Moth to see and avoid traffic. A contributing factor was the delayed reaction of the student pilot in the Cessna to initiate a turnoff of the taxiway once it became apparent that the other airplane did not see him.
- [NTSB MIA99FA012](https://openairdocs.org/ntsb/MIA99FA012.md): Aerospatiale ATR-42-300 · San Juan, PR · Accident · Minor injuries · Field investigation · Final report · Oct 25, 1998 · N143DD · Substantial damage
  > The pilot's failure to verify that the parking brake was applied prior to engine start, and the resultant inadvertent movement of the aircraft and collision with the ground power cart once No. 2 was started.
- [NTSB MIA99LA015](https://openairdocs.org/ntsb/MIA99LA015.md): Peters Strojnik S2A · Pensacola, FL · Accident · No injuries · Limited investigation · Final report · Oct 24, 1998 · N70136 · Substantial damage
  > The aircraft's uncontrolled climb after encountering a wind gust or thermal during landing flare without engine power resulting in the pilot having to force the aircraft onto the runway making a hard landing prior to the end of the runway.
- [NTSB DCA99WA008](https://openairdocs.org/ntsb/DCA99WA008.md): Boeing 727 · Point A Pitre, France · Incident · No injuries · Foreign investigation · Oct 20, 1998 · N886MA · No damage
- [NTSB NYC99LA011](https://openairdocs.org/ntsb/NYC99LA011.md): Zeidler Sonerai II · Kenton, OH · Accident · No injuries · Limited investigation · Final report · Oct 15, 1998 · N5DZ · Substantial damage
  > The pilot's premature rotation and failure to obtain/maintain airspeed during the takeoff, which resulted in a stall and impact with the ground. Factors in this accident were the pilot's lack of total experience in tail-wheeled aircraft, and the nose high…
- [NTSB NYC99LA008](https://openairdocs.org/ntsb/NYC99LA008.md): WSK PZL Krosno KR-03A · Hilltown, PA · Accident · No injuries · Limited investigation · Final report · Oct 11, 1998 · N408KP · Substantial damage
  > The pilot's misjudgment of altitude/distance which resulted in an in-flight collision which trees.
- [NTSB LAX98LA302](https://openairdocs.org/ntsb/LAX98LA302.md): Bognuda Livio IV Lancair · Reno, NV · Accident · No injuries · Limited investigation · Final report · Sep 21, 1998 · N805L · 2 aircraft · Substantial damage
  > The failure of the pilot-in-command to maintain adequate visual surveillance of the taxiway in front of his aircraft to avoid the collision.
- [NTSB LAX98LA293](https://openairdocs.org/ntsb/LAX98LA293.md): PZL-Bielsko SZD-59 · Truckee, CA · Accident · Serious injuries · Limited investigation · Final report · Sep 14, 1998 · N59SE · Destroyed
  > The failure of the pilot to maintain sufficient airspeed which resulted in a inadvertent stall/spin.
- [NTSB MIA98LA230](https://openairdocs.org/ntsb/MIA98LA230.md): Bell 47D1 · Dawson, GA · Accident · No injuries · Limited investigation · Final report · Aug 29, 1998 · N4702S · Substantial damage
  > The pilot's selection of unsuitable terrain for landing resulting in debris being blown up during landing resulting in damage to the tail rotor and loss of control.
- [NTSB SEA98LA163](https://openairdocs.org/ntsb/SEA98LA163.md): Six/Huber RV-6 · Roseburg, OR · Accident · No injuries · Limited investigation · Final report · Aug 12, 1998 · N26CH · Substantial damage
  > A total loss of engine power for undetermined reasons.
- [NTSB FTW98FA354](https://openairdocs.org/ntsb/FTW98FA354.md): Mooney M20J · Centennial, WY · Accident · 1 fatal · Field investigation · Final report · Aug 4, 1998 · N5698L · Destroyed
  > The pilot's disregard of information provided in weather briefs, and his flight into known adverse weather in mountainous terrain which resulted in an in-flight collision with a mountain. Factors were rain and low ceiling/visibility.
- [NTSB LAX98LA253](https://openairdocs.org/ntsb/LAX98LA253.md): Yakovlev YAK-55M · Lincoln, CA · Accident · No injuries · Limited investigation · Final report · Aug 1, 1998 · N910RT · 2 aircraft · Substantial damage
  > The pilot of the other aircraft's inadequate visual lookout
- [NTSB LAX98FA236](https://openairdocs.org/ntsb/LAX98FA236.md): Sikorsky CH-54A · Yucca Valley, CA · Accident · 3 fatal · Field investigation · Final report · Jul 18, 1998 · N64KL · Destroyed
  > An in-flight main rotor blade spar separation as a result of the pilot-in-command's decision to continue to fly the aircraft after it had failed an AD directed BIM check. Factors were the failure of the operator's chief pilot to maintain proper supervision…
- [NTSB CHI98FAMS1](https://openairdocs.org/ntsb/CHI98FAMS1.md): Aero Vodochody Aero. Works L-39C · Traverse City, MI · Accident · 2 fatal · Missing aircraft · Final report · Jul 3, 1998 · N7868M · Destroyed
  > Undetermined.
- [NTSB IAD98LA074](https://openairdocs.org/ntsb/IAD98LA074.md): American Blimp ABC-A-60 · Lock Haven, PA · Accident · No injuries · Limited investigation · Final report · Jul 1, 1998 · N760AB · Substantial damage
  > the pilot's encounter with unforecasted downdrafts.
- [NTSB IAD98LA073](https://openairdocs.org/ntsb/IAD98LA073.md): Saab-Scania F-35 Draken · Oceana, VA · Accident · No injuries · Limited investigation · Final report · Jun 26, 1998 · N156XD · Substantial damage
  > The pilot-in-command's inadequate fuel management which led to fuel exhaustion and subsequent loss of engine power. A related factor was the pilot's unfamiliarity with the fuel system.
- [NTSB SEA98FA109](https://openairdocs.org/ntsb/SEA98FA109.md): Nolley BD-5T · Corvallis, OR · Accident · No injuries · Field investigation · Final report · Jun 21, 1998 · N50TX · Substantial damage
  > The introduction of a fuel containing an ethanol additive into fuel tanks sloshed/sealed with a compound incompatible with alcohols, resulting in debonding of the compound from the fuel tank walls, leading to partial blockage of an in-line fuel filter, and a…
- [NTSB NYC98FA129](https://openairdocs.org/ntsb/NYC98FA129.md): Hawker Hunter T MK 8 · Manchester, NH · Accident · 1 fatal · Field investigation · Final report · Jun 18, 1998 · N745WT · Destroyed
  > Fuel exhaustion, resulting from the pilot's reliance on an inaccurate fuel quantity indicating system. A factor in the pilot's death was his intentional delay of the ejection sequence in order to avoid people and property on the ground.
- [NTSB ANC98LA071](https://openairdocs.org/ntsb/ANC98LA071.md): Cessna 172 · Angoon, AK · Accident · No injuries · Limited investigation · Final report · Jun 12, 1998 · N171Q · Substantial damage
  > The pilot's failure to maintain directional control during the aborted takeoff. A factor associated with the accident was rough and uneven terrain.
- [NTSB LAX98LA192](https://openairdocs.org/ntsb/LAX98LA192.md): Arner Challenger II S · Pleasant Valley, AZ · Accident · No injuries · Limited investigation · Final report · Jun 7, 1998 · N2NX · Substantial damage
  > Loss of engine power due to a loose spark plug wire cap caused by a broken spark plug retainer spring.
- [NTSB MIA98LA179](https://openairdocs.org/ntsb/MIA98LA179.md): Rotorway Executive 162F · New Port Richey, FL · Accident · No injuries · Limited investigation · Final report · Jun 5, 1998 · N162WM · Substantial damage
  > The pilot's improper use of the collective. Contributing to the accident was pilot fatigue due to lack of sleep.
- [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 CHI98LA152](https://openairdocs.org/ntsb/CHI98LA152.md): Read Rotorway Executive · Valparaiso, IN · Accident · No injuries · Limited investigation · Final report · May 13, 1998 · N4561C · Substantial damage
  > the pilot not maintaining adequate clearance with the ground during hover. Factors which contributed to this accident were the pilot's execution of a hovering turn at too low of an altitude, inadequate preflight preparation, and failing to remove the…
- [NTSB IAD98FA054](https://openairdocs.org/ntsb/IAD98FA054.md): Beech A36 · Davis, WV · Accident · 4 fatal · Field investigation · Final report · May 12, 1998 · N72141 · Destroyed
  > The pilot's spatial disorientation, his subsequent loss of control of the airplane, and his overload of the horizontal stabilizer during a recovery attempt. Factors include the pilot's continued flight into icing conditions, his lack of airspeed control, and…
- [NTSB IAD98FA049](https://openairdocs.org/ntsb/IAD98FA049.md): Fairchild Hiller FH-1100 · Stevensville, MD · Accident · 2 fatal · Field investigation · Final report · Apr 26, 1998 · N1345Q · Destroyed
  > The pilot's abrupt, low-g maneuver, which resulted in mast bumping and separation of the main rotor system.
- [NTSB MIA98LA143](https://openairdocs.org/ntsb/MIA98LA143.md): Orlando Heli Air TR-2000 · Lakeland, FL · Accident · Minor injuries · Limited investigation · Final report · Apr 25, 1998 · N202TR · Substantial damage
  > The pilot's failure to obtain the proper touch down point (landed left of runway) on landing.
- [NTSB ATL98LA062](https://openairdocs.org/ntsb/ATL98LA062.md): Stewart 51 S-51D · Vero Beach, FL · Accident · No injuries · Limited investigation · Final report · Apr 18, 1998 · N51S · Substantial damage
  > The maintenance personnel failure to remove a plastic plug from the oil tank breather that resulted in the rupture of the engine oil tank. Factors were, a tailwind during the emergency landing, and a ditch on the departure end of the runway.
- [NTSB FTW98LA179](https://openairdocs.org/ntsb/FTW98LA179.md): Wsk Pzl Mielec PZL-M-18 · Carlisle, AR · Accident · Minor injuries · Limited investigation · Final report · Apr 10, 1998 · N7046Y · Substantial damage
  > The pilot's inadequate preflight and inflight planning/decision, which resulted in fuel exhaustion and the lost of engine power. A factor was the lack of suitable terrain for a forced landing.

## 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 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=1998

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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.