# NTSB investigations: Amateur-built UNKNOWN ENG

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 28 of 41 · 2,048 cases

## Cases, newest first

- [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.
- [NTSB SEA98LA016](https://openairdocs.org/ntsb/SEA98LA016.md): Short Brothers SD3-60 · Billings, MT · Accident · No injuries · Limited investigation · Final report · Nov 25, 1997 · N691A · Substantial damage
  > The co-pilot's failure to maintain the proper descent rate on final approach, the pilot-in-command's delayed remedial action, and overload of the left main landing gear assembly. Factors contributing were snow, crosswind conditions and deteriorating…
- [NTSB FTW98LA034](https://openairdocs.org/ntsb/FTW98LA034.md): Wsk Pzl Mielec M-18A · Roanoke, LA · Accident · No injuries · Limited investigation · Final report · Oct 27, 1997 · N149RA · Substantial damage
  > loss of engine power for an undetermined reason(s). A factor relating to the accident was: the lack of suitable terrain for a forced landing.
- [NTSB SEA98LA008](https://openairdocs.org/ntsb/SEA98LA008.md): Beckham RV-4 · Scio, OR · Accident · 1 fatal · Limited investigation · Final report · Oct 26, 1997 · N160HB · Destroyed
  > The pilot-in-command's loss of control of the aircraft for undetermined reasons.
- [NTSB FTW98LA015](https://openairdocs.org/ntsb/FTW98LA015.md): Sego Tool Hawk H2X · Tooele, UT · Accident · No injuries · Limited investigation · Final report · Oct 15, 1997 · N4412X · Substantial damage
  > The pilot's failure to maintain aircraft control. Contributing was the inadequate design of the flight control systems, resulting in slow response to pilot input.
- [NTSB NYC98LA010](https://openairdocs.org/ntsb/NYC98LA010.md): Sukhoi SU-29 · Williamstown, NJ · Accident · No injuries · Limited investigation · Final report · Oct 11, 1997 · N929CB · Substantial damage
  > The pilot misjudged his altitude and airspeed.
- [NTSB FTW97LA360](https://openairdocs.org/ntsb/FTW97LA360.md): Schweizer SGS 1-34 · Heber City, UT · Accident · No injuries · Limited investigation · Final report · Sep 23, 1997 · N7636 · Substantial damage
  > The pilot's improper use of spoilers during the landing sequence. Factors were the embankment and the fence.
- [NTSB IAD97LA121](https://openairdocs.org/ntsb/IAD97LA121.md): Pohlman/Pohlman Rotorway Exec 90 · Westminster, MD · Accident · Minor injuries · Limited investigation · Final report · Sep 21, 1997 · N94CJ · Substantial damage
  > The loss of power due to carburetor icing. A factor to this accident was the carburetor heat was not accessible from within the cockpit.
- [NTSB FTW97LA337](https://openairdocs.org/ntsb/FTW97LA337.md): Piper PA-22 · Saratoga, WY · Accident · No injuries · Limited investigation · Final report · Sep 3, 1997 · N8731C · Substantial damage
  > The pilot's failure to consult airplane performance data based upon the weather conditions that prevailed. Factors were terrain induced turbulence and high density altitude.
- [NTSB SEA97LA189](https://openairdocs.org/ntsb/SEA97LA189.md): Rotz RAF 2000 GTX SE · Olympia, WA · Accident · Minor injuries · Limited investigation · Final report · Aug 15, 1997 · N9155H · Substantial damage
  > The pilot's failure to attain adequate rotor rpm prior to takeoff.
- [NTSB NYC97LA163](https://openairdocs.org/ntsb/NYC97LA163.md): Elliot Monnett Moni · Hollis, NH · Accident · 1 fatal · Limited investigation · Final report · Aug 9, 1997 · N2400M · Destroyed
  > The pilot's failure to maintain adequate airspeed which resulted in an inadvertent stall spin and collision with terrain.
- [NTSB FTW97LA300](https://openairdocs.org/ntsb/FTW97LA300.md): Poor Boys Toys Exec 90 · Patricia, TX · Accident · No injuries · Limited investigation · Final report · Aug 1, 1997 · N596PB · Substantial damage
  > The failure of the pilot to maintain terrain clearance with the crops during a surveying flight. A factor was the pilots diverted attention.
- [NTSB LAX97LA265](https://openairdocs.org/ntsb/LAX97LA265.md): Schempp-Hirth DUO Discus · Minden, NV · Accident · No injuries · Limited investigation · Final report · Jul 24, 1997 · N125DD · Substantial damage
  > The pilot's failure to ensure that the wings were maintained at a lateral level attitude during the initial landing rollout. A factor in the accident was the rough, uneven nature of the terrain chosen for the landing.
- [NTSB ATL97LA111](https://openairdocs.org/ntsb/ATL97LA111.md): Avid IV · Memphis, TN · Accident · No injuries · Limited investigation · Final report · Jul 21, 1997 · N913R · Substantial damage
  > The pilot's failure to maintain control of the aircraft during takeoff. A factor in the accident was the repositioning of the control stick.
- [NTSB ATL97LA103](https://openairdocs.org/ntsb/ATL97LA103.md): Hughes 269C · Johnston, SC · Accident · No injuries · Limited investigation · Final report · Jul 13, 1997 · N7413F · Substantial damage
  > failure of the pilot to maintain the proper rotor RPM during the approach and flare for landing.
- [NTSB CHI97LA190](https://openairdocs.org/ntsb/CHI97LA190.md): Dietrich Nieuport 12 · Byron, MI · Accident · Serious injuries · Limited investigation · Final report · Jun 29, 1997 · N169RD · Destroyed
  > The owner/pilot mechanic's inadequate inspection of the aircraft which led to contamination (other than water) of the fuel filter.
- [NTSB NYC97LA127](https://openairdocs.org/ntsb/NYC97LA127.md): Eiriavion PIK-20E · Rochester, VT · Accident · No injuries · Limited investigation · Final report · Jun 23, 1997 · N1043G · Substantial damage
  > The pilot's inadequate evaluation of the weather that consisted of downdrafts and his inadequate start procedures that resulted in a forced landing and collision with trees.
- [NTSB LAX97LA183](https://openairdocs.org/ntsb/LAX97LA183.md): North American Navion NA-1 · Morristown, AZ · Accident · No injuries · Limited investigation · Final report · May 18, 1997 · N8551H · Substantial damage
  > failure to replace an old and abraded oil feedline hose which led to its rupture and the in-flight loss of engine oil pressure. A related factor was the pilot's misjudgment of distance-to-go versus altitude remaining during the subsequent forced landing.
- [NTSB FTW97IA362](https://openairdocs.org/ntsb/FTW97IA362.md): Ayres S2R-G10 · Munday, TX · Incident · No injuries · Incident investigation · Final report · May 8, 1997 · N3298Y · Minor damage
  > blockage of both fuel lines from the left wing tank to the header tank by silicone rubber contaminants (foreign material), which resulted in fuel starvation. A related factor was the lack of suitable terrain for the forced landing.
- [NTSB MIA97LA091](https://openairdocs.org/ntsb/MIA97LA091.md): Hackett Windex 1200C · Wauchula, FL · Accident · 1 fatal · Limited investigation · Final report · Mar 2, 1997 · N1201G · Destroyed
  > failure of the pilot to maintain adequate airspeed, while maneuvering, which resulted in an inadvertent stall/spin and subsequent collision with terrain.
- [NTSB LAX97LA118](https://openairdocs.org/ntsb/LAX97LA118.md): Balloon Works AX-8B · Parker, AZ · Accident · Serious injuries · Limited investigation · Final report · Mar 1, 1997 · N9033H · No damage
  > the pilot's inadequate in-flight planning, which resulted in an excessive descent and subsequent hard landing, due to a drop in fuel pressure along with shifting winds at low altitude.
- [NTSB ATL97IA035](https://openairdocs.org/ntsb/ATL97IA035.md): Boeing 757-232 · Atlanta, GA · Incident · No injuries · Incident investigation · Final report · Jan 31, 1997 · N611DL · Minor damage
  > failure of the Stage 1 High Pressure Turbine due to a fatigue fracture in a disk blade retention lug.
- [NTSB FTW97LA079](https://openairdocs.org/ntsb/FTW97LA079.md): Hughes 369HS · Wellington, CO · Accident · Minor injuries · Limited investigation · Final report · Jan 7, 1997 · N9089F · Destroyed
  > The pilot's failure to maintain control of the aircraft and his improper autorotation technique that induced the roll and subsequent ground collision. A factor was his lack of recurrent training.
- [NTSB MIA97LA045](https://openairdocs.org/ntsb/MIA97LA045.md): Issoire-Aviation PIK-30 · Boynton Beach, FL · Accident · No injuries · Limited investigation · Final report · Dec 28, 1996 · N25RJ · Substantial damage
  > failure of the engine to restart for undetermined reason(s), after gliding (sailing) for about 3 hours, resulting in a forced landing in a swamp.
- [NTSB SEA97LA020](https://openairdocs.org/ntsb/SEA97LA020.md): Karmy Rotorway Exec · Redmond, OR · Accident · Minor injuries · Limited investigation · Final report · Oct 25, 1996 · N728PC · Substantial damage
  > The pilot's failure to remove the dolly wheels during the preflight inspection.
- [NTSB SEA96LA220](https://openairdocs.org/ntsb/SEA96LA220.md): Ralph Taylor Royal T · Kent, WA · Accident · No injuries · Limited investigation · Final report · Sep 25, 1996 · N2554 · Substantial damage
  > in-flight collision with an unknown object.
- [NTSB FTW96LA377](https://openairdocs.org/ntsb/FTW96LA377.md): Pzl-Mielec MIG-17 · Amarillo, TX · Accident · Serious injuries · Limited investigation · Final report · Sep 6, 1996 · N1719 · Destroyed
  > The pilot's excessive takeoff rotation which led to premature lift-off at a speed inadequate to maintain flight. A factor was the pilot's lack of experience in the MIG-17.
- [NTSB FTW96LA360](https://openairdocs.org/ntsb/FTW96LA360.md): Cresap Early Bird Jenny · Kersey, CO · Accident · Minor injuries · Limited investigation · Final report · Aug 25, 1996 · N12JN · Destroyed
  > Failure of the throttle linkage. A related factor was the lack of suitable terrain for the forced landing.
- [NTSB FTW96LA356](https://openairdocs.org/ntsb/FTW96LA356.md): Bell 47 Soloy · Intracoastal, LA · Accident · No injuries · Limited investigation · Final report · Aug 23, 1996 · N1169W · Destroyed
  > the loss of aircraft control by unknown person(s).
- [NTSB SEA96LA196](https://openairdocs.org/ntsb/SEA96LA196.md): Westcott Glasair I-FT · Puyallup, WA · Accident · Serious injuries · Limited investigation · Final report · Aug 21, 1996 · N289W · Substantial damage
  > failure of the air inlet screen, and subsequent ingestion of the foam air filter. An inadequate maintenance modification by the amateur builder and no suitable landing area were related factors.
- [NTSB SEA96LA191](https://openairdocs.org/ntsb/SEA96LA191.md): Champion 7ECA · Lander, WY · Accident · No injuries · Limited investigation · Final report · Aug 19, 1996 · N9542S · Substantial damage
  > the pilot's failure to maintain directional control of the airplane during the landing roll. Factors relating to the accident were: the variable and gusty wind conditions.
- [NTSB SEA96LA188](https://openairdocs.org/ntsb/SEA96LA188.md): Jonas Exec 90 · Hermiston, OR · Accident · Minor injuries · Limited investigation · Final report · Aug 12, 1996 · N6183P · Substantial damage
  > slippage of the drive belts, while hover taxiing in ground effect, which resulted in loss of power to the rotor system; and inadequate remedial action by the pilot, which led to a roll over during touch down (forced landing). A factor relating to the accident…
- [NTSB SEA96LA162](https://openairdocs.org/ntsb/SEA96LA162.md): Conkey/Wapelhorst Lancair 235 · Cottage Grove, OR · Accident · No injuries · Limited investigation · Final report · Jul 20, 1996 · N235WC · Substantial damage
  > release of the main landing gear locking mechanism for undetermined reason(s).
- [NTSB FTW96LA294](https://openairdocs.org/ntsb/FTW96LA294.md): O'Day Sonerai II-LS · Friendswood, TX · Accident · Minor injuries · Limited investigation · Final report · Jul 9, 1996 · N30155 · Substantial damage
  > a loss of engine power for undetermined reasons, and the pilot's failure to attain the proper traffic pattern altitude on the downwind leg prior to turning the base leg.
- [NTSB CHI96LA225](https://openairdocs.org/ntsb/CHI96LA225.md): Sisk BD-5 · Lake Geneva, WI · Accident · Serious injuries · Limited investigation · Final report · Jul 1, 1996 · N51SK · Destroyed
  > failure of the pilot to abort the takeoff, while there was sufficient runway remaining. The high temperature and calm wind were related factors.
- [NTSB MIA96FA168](https://openairdocs.org/ntsb/MIA96FA168.md): Hiller FH-1100 · Webster, FL · Accident · 2 fatal · Field investigation · Final report · Jun 28, 1996 · N598F · Substantial damage
  > inadequate compliance with AD 77-07-08 (and SB FH1100-55-2A) by other maintenance personnel, and subsequent fatigue failure of plates in the tail rotor torsion tension bar. Factors related to the accident were: manufacturing discontinuities…
- [NTSB CHI96LA208](https://openairdocs.org/ntsb/CHI96LA208.md): Aerotechnik L-13 · Wichita, KS · Accident · No injuries · Limited investigation · Final report · Jun 20, 1996 · N21400 · Substantial damage
  > the pilot's inadequate in-flight planning. Factors were the insufficient altitude and the dead battery.
- [NTSB CHI96LA192](https://openairdocs.org/ntsb/CHI96LA192.md): Carrison-Seiman Schukert D-1 · Gardner, KS · Accident · No injuries · Limited investigation · Final report · Jun 10, 1996 · N51CQ · Substantial damage
  > an aileron control malfunction of undetermined origin. A factor was the pilot's inability to control the airplane.
- [NTSB NYC96LA117](https://openairdocs.org/ntsb/NYC96LA117.md): Cessna 177B · Chatham, MA · Accident · Minor injuries · Limited investigation · Final report · May 28, 1996 · N19708 · Substantial damage
  > failure of the oil pump, which resulted in oil starvation and subsequent failure of the number two and four cylinder connecting rods. Also causal was inadequate maintenance by noncompliance with the airworthiness directive that required replacement of the oil…

Next page: https://openairdocs.org/ntsb.md?engine=99999&page=29

## 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 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&page=28

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