# NTSB investigations: Unknown

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 23 of 40 · 1,978 cases

## Cases, newest first

- [NTSB DCA90IA048](https://openairdocs.org/ntsb/DCA90IA048.md): Airbus Industrie A320-211 · Chicago, IL · Incident · No injuries · Incident investigation · Final report · Aug 10, 1990 · N306US · Minor damage
  > The pilot(s) allowed the aircraft to rotate to an excessive nose high attitude, either during a takeoff or landing.
- [NTSB CHI90DEM08](https://openairdocs.org/ntsb/CHI90DEM08.md): Cessna 150L · Holland, MI · Accident · 2 fatal · Final report · Aug 7, 1990 · N741MF · Destroyed
  > Undetermined. Factors related to the accident were: darkness & impairment of the pilot due to carbon monoxide.
- [NTSB NYC90LA188](https://openairdocs.org/ntsb/NYC90LA188.md): Cessna 150M · Rochester, NH · Accident · No injuries · Limited investigation · Final report · Aug 4, 1990 · N45238 · Substantial damage
  > Undetermined.
- [NTSB SEA90FA146](https://openairdocs.org/ntsb/SEA90FA146.md): Wheeler Technology FT-210 · Linch, WY · Accident · 3 fatal · Field investigation · Final report · Jul 25, 1990 · N210EX · Destroyed
  > Failure of the pilot to maintain control of the aircraft and/or correct the stall/spin.
- [NTSB CHI90FA185](https://openairdocs.org/ntsb/CHI90FA185.md): Piper PA-28-140 · Grand Marais, MN · Accident · 3 fatal · Field investigation · Final report · Jul 14, 1990 · N6146W · Destroyed
  > Poor judgement of the pilot due to his impairment from consumption of alcohol, and his failure to maintain control of the aircraft. A factor related to the accident was: pilot fatigue due to lack of sleep.
- [NTSB LAX90FA211](https://openairdocs.org/ntsb/LAX90FA211.md): Beech 35-33 · Paso Robles, CA · Accident · 1 fatal · Field investigation · Final report · Jun 8, 1990 · N996T · Destroyed
  > Undetermined.
- [NTSB LAX90LA158](https://openairdocs.org/ntsb/LAX90LA158.md): Bellanca 8KCAB · Phoenix, AZ · Accident · 1 fatal · Limited investigation · Final report · Jun 7, 1990 · N50353 · Destroyed
  > The pilot failed to maintain control of the airplane.
- [NTSB NYC90GA105](https://openairdocs.org/ntsb/NYC90GA105.md): Bellanca 17-31A · Davis Park, NY · Accident · 4 fatal · Final report · May 12, 1990 · N7SF · Destroyed
  > The airplane impacting the water at a high speed for unknown reason(s).
- [NTSB CHI90FAMS2](https://openairdocs.org/ntsb/CHI90FAMS2.md): Piper PA-30B · Charlevoix, MI · Accident · 2 fatal · Missing aircraft · Final report · Apr 20, 1990 · N8333Y · Destroyed
  > The probable cause of this accident is undetermined.
- [NTSB MIA90FA106](https://openairdocs.org/ntsb/MIA90FA106.md): Piper PA-38-112 · Marco Island, FL · Accident · 1 fatal · Field investigation · Final report · Apr 18, 1990 · N91309 · Destroyed
  > Fuel exhaustion due to improper planning & decision by the pilot, and an inadvertent stall/spin while maneuvering for a forced landing.
- [NTSB MIA90LA061](https://openairdocs.org/ntsb/MIA90LA061.md): Cessna 152 · Missing, FL · Accident · 2 fatal · Limited investigation · Final report · Jan 24, 1990 · N4802B · Destroyed
  > Undetermined.
- [NTSB SEA90FA036](https://openairdocs.org/ntsb/SEA90FA036.md): Piper PA-18 · Longmire, WA · Accident · 2 fatal · Field investigation · Final report · Jan 20, 1990 · N7216K · Destroyed
  > Undetermined.
- [NTSB MIA90FA060](https://openairdocs.org/ntsb/MIA90FA060.md): Piper J-3 · Clewiston, FL · Accident · 2 fatal · Field investigation · Final report · Jan 20, 1990 · N88125 · Destroyed
  > Failure of the pilot to secure the flight control stick (inadequate preflight) before takeoff.
- [NTSB MIA90LA053](https://openairdocs.org/ntsb/MIA90LA053.md): Beech E185 · Wauchula, FL · Accident · No injuries · Limited investigation · Final report · Jan 13, 1990 · N50BP · Substantial damage
  > Loss of air pressure in the left main tire during flight, which resulted in a ground swerve during the landing and a nose over as the pilot was correcting with opposite brake and rudder.
- [NTSB DEN90FA041](https://openairdocs.org/ntsb/DEN90FA041.md): Cessna 182P · Tom'S Place, CA · Accident · 3 fatal · Field investigation · Final report · Jan 13, 1990 · N5831J · Destroyed
  > Continued flight by the pilot into instrument meteorological conditions (IMC), and his failure to maintain sufficient altitude above the ground. Factors related to the accident were: dark night, adverse weather conditions, self induced pressure, and spatial…
- [NTSB CHI90IA064](https://openairdocs.org/ntsb/CHI90IA064.md): Boeing 747-151 · Detroit, MI · Incident · No injuries · Incident investigation · Final report · Jan 10, 1990 · N602US · Minor damage
  > A fire in the aft cargo compartment for undetermined reasons(s).
- [NTSB CHI90LA280](https://openairdocs.org/ntsb/CHI90LA280.md): Piper PA-22-150 · Engadine, MI · Accident · 1 fatal · Limited investigation · Final report · Dec 2, 1989 · N2440P · Substantial damage
  > A collision with trees and the terrain for undetermined reasons.
- [NTSB FTW90GA040](https://openairdocs.org/ntsb/FTW90GA040.md): Aerospatiale AS-350B · Liberty Hill, TX · Accident · Serious injuries · Final report · Nov 30, 1989 · N5804T · Destroyed
  > Undetermined.
- [NTSB DCA90MA010](https://openairdocs.org/ntsb/DCA90MA010.md): Britten-Norman BN-2 · Block Island, RI · Accident · 8 fatal · Major investigation · Final report · Nov 28, 1989 · N127JL · Destroyed
  > The aircraft crashed for an undetermined reason, during an overwater flight on a dark (moonless) night under a cloud layer. A SIGMET was in effect warning of moderate to occasionally severe turbulence below 6000 feet and the potential of low level wind shear.
- [NTSB CHI90LA032](https://openairdocs.org/ntsb/CHI90LA032.md): Cessna 182H · Howell, MI · Accident · Minor injuries · Limited investigation · Final report · Nov 23, 1989 · N819CM · Substantial damage
  > Failure of the mixture control cable, which resulted in a loss of power due to fuel starvation during a climb after takeoff. A factor related to the accident was: rough terrain in the emergency landing area.
- [NTSB LAX90LAMS1](https://openairdocs.org/ntsb/LAX90LAMS1.md): Cessna U206E · Pacific Ocean (Pacific Ocean) · Accident · 1 fatal · Final report · Nov 17, 1989 · N9423G · Destroyed
  > Undetermined.
- [NTSB SEA90FAMS1](https://openairdocs.org/ntsb/SEA90FAMS1.md): Beech 36TC · Missing · Accident · 1 fatal · Missing aircraft · Final report · Oct 6, 1989 · N6773C · Destroyed
  > Undetermined until the airplane is located.
- [NTSB SEA89LA179](https://openairdocs.org/ntsb/SEA89LA179.md): Luscombe 8A · Mackay, ID · Accident · 2 fatal · Limited investigation · Final report · Sep 24, 1989 · N71756 · Substantial damage
  > The pilot failed to maintain an adequate airspeed for flight. High density altitude was a factor.
- [NTSB SEA89LA187](https://openairdocs.org/ntsb/SEA89LA187.md): Evans Wittman Tailwind W10 · McCall, ID · Accident · 1 fatal · Class 3 · Limited · Final report · Sep 1, 1989 · N62JE · Destroyed
  > A collision with terrain for undetermined reasons.
- [NTSB ANC89FA144](https://openairdocs.org/ntsb/ANC89FA144.md): Piper PA-12 · Windy Fork, AK · Accident · 2 fatal · Field investigation · Final report · Aug 13, 1989 · N7542H · Destroyed
  > Failure of the pilot to maintain airspeed while operating to or from the gravel bar, which resulted in an inadvertent stall. The rising terrain was considered a contributing factor.
- [NTSB ANC89LA181](https://openairdocs.org/ntsb/ANC89LA181.md): Cessna R172K · Anchorage, AK · Accident · 4 fatal · Limited investigation · Final report · Aug 12, 1989 · N1211V · Destroyed
  > Undetermined.
- [NTSB MIA89FA214](https://openairdocs.org/ntsb/MIA89FA214.md): Cessna 210L · Marco, FL · Accident · 1 fatal · Field investigation · Final report · Aug 5, 1989 · N2676S · Destroyed
  > Continued VFR flight by the pilot into instrument meteorological conditions (IMC), his misjudgment of altitude and his physical impairment from use of drugs. Contributing factors were: the pilot's probable spatial disorientation, and the night/weather…
- [NTSB SEA89LA134](https://openairdocs.org/ntsb/SEA89LA134.md): Mirsepasy 3Q2 · Arlington, WA · Accident · No injuries · Limited investigation · Final report · Jul 18, 1989 · N38AM · Substantial damage
  > Fuel starvation due to a blocked fuel line which resulted in the pilot having to land on unsuitable terrain.
- [NTSB CHI89FA117](https://openairdocs.org/ntsb/CHI89FA117.md): Piper PA-24-180 · Delphi, IN · Accident · 1 fatal · Field investigation · Final report · Jun 21, 1989 · N30BS · Destroyed
  > Improper planning/decision of the pilot, which resulted in fuel exhaustion from an inadequate supply of fuel, and his failure to maintain flying speed during a forced landing, which resulted in a stall and subsequent impact with the ground.
- [NTSB SEA89FA099](https://openairdocs.org/ntsb/SEA89FA099.md): Cushing 4 · Mansfield, WA · Accident · 2 fatal · Field investigation · Final report · Jun 4, 1989 · N5321U · Destroyed
  > Failure of the left wing main spar due to overload for undetermined reasons.
- [NTSB SEA89FA186](https://openairdocs.org/ntsb/SEA89FA186.md): American AA-1A · Enumclaw, WA · Accident · 1 fatal · Field investigation · Final report · Apr 7, 1989 · N9473L · Destroyed
  > Attempted flight into known adverse weather conditions. Factors include clouds, downdrafts, high winds.
- [NTSB MIA89FA109](https://openairdocs.org/ntsb/MIA89FA109.md): Cessna 172M · Pascagoula, MS · Accident · 2 fatal · Field investigation · Final report · Mar 17, 1989 · N80542 · Destroyed
  > Continued flight by the pilot into instrument meteorological conditions (IMC). Contributing factors were: inadequate preflight planning, weather conditions, pilot's lack of instrument flight time, lack of visual cues at night, and trees at the crash site.
- [NTSB ATL89FA106](https://openairdocs.org/ntsb/ATL89FA106.md): Beech H35 · Knoxville, TN · Accident · 2 fatal · Field investigation · Final report · Mar 16, 1989 · N5403D · Substantial damage
  > The pilot's continued operation of the airplane with a known mechanical defect in the engine carburetor/fuel supply system as evidenced by the past history of engine stoppage during ground operation. Contributing to the accident was the pilot's performance of…
- [NTSB BFO89FA020](https://openairdocs.org/ntsb/BFO89FA020.md): Cessna 152 · Townsend, DE · Accident · 1 fatal · Field investigation · Final report · Mar 6, 1989 · N24236 · Destroyed
  > Loss of aircraft control for unknown reasons.
- [NTSB MKC89FA061](https://openairdocs.org/ntsb/MKC89FA061.md): Beech 58 · Hamburg, AR · Accident · 2 fatal · Field investigation · Final report · Feb 17, 1989 · N348U · Destroyed
  > The pilot continued VFR flight into IMC conditions and failed to maintain sufficient altitude above the wooded terrain. Weather conditions, low light conditions at or near dusk, lack of visual cues (visual perception) by the pilot, and trees were contributing…
- [NTSB MIA89LAMS1](https://openairdocs.org/ntsb/MIA89LAMS1.md): Piper PA-28-151 · Missing Acft (Atlantic Ocean) · Accident · 1 fatal · Final report · Feb 6, 1989 · N6834J · Destroyed
  > The pilot's decision to commit suicide. Contributing to the accident was the pilot's interpersonal relations and his psychological condition.
- [NTSB DCA89LA012](https://openairdocs.org/ntsb/DCA89LA012.md): Mitsubishi MU-2J · Missing (Pacific Ocean) · Accident · 1 fatal · Limited investigation · Final report · Dec 9, 1988 · N296MA · Destroyed
  > During a flt at night from majuro, marshall islands to cairns, australia, the plt requested a dscnt from FL 190 to 12,000 to remove ice from the airframe. Later, he requested a climb to FL 200. After starting the climb, he made a mayday call to sidney flt…
- [NTSB CHI89FA030](https://openairdocs.org/ntsb/CHI89FA030.md): Mooney M20J · Vermillion, IL · Accident · 2 fatal · Field investigation · Final report · Dec 3, 1988 · N201UL · Destroyed
- [NTSB LAX89LA054](https://openairdocs.org/ntsb/LAX89LA054.md): Cessna 175 · Tracy, CA · Accident · No injuries · Limited investigation · Final report · Nov 20, 1988 · N6641E · Substantial damage
  > The airplane was found nosed over and abandoned short of the airport. The owner of the airplane was identified as the pilot, however, he does not hold a pilots license nor a medical certificate. Inspection of the airplane revealed that the fuel tanks were…
- [NTSB SEA89LA019](https://openairdocs.org/ntsb/SEA89LA019.md): Piper PA-18 · Idaho Falls, ID · Accident · Serious injuries · Limited investigation · Final report · Nov 17, 1988 · N1963P · Destroyed
  > Plt reportedly stole acft and departed about midnight in snowstorm. For 3 hours he buzzed local residences vehicles until fuel exhaustion. Forced lndg made in rough field. Investigation revealed plt had long history of mental illness and had falsified medical…
- [NTSB LAX89LA028](https://openairdocs.org/ntsb/LAX89LA028.md): Robinson R22 · Lower Lake, CA · Accident · 1 fatal · Limited investigation · Final report · Oct 30, 1988 · N2627K · Destroyed
  > During a local solo instructional flight, the helicopter collided with the terrain in an open field aprx 3 miles from the airport. It was reported to have contacted the ground at considerable downward speed with high rotor RPM. No preimpact mechanical failure…
- [NTSB NYC89DHM03](https://openairdocs.org/ntsb/NYC89DHM03.md): Vangorden KR-2 · Allaire, NJ · Accident · 1 fatal · Final report · Oct 12, 1988 · N3774G · Destroyed
  > The homebuilt aircraft was being flown on its maiden flight when the accident occurred. A witness stated that he observed the aircraft 'swirling down like a bird with a broken wing.' According to him, the aircraft was intact with no evidence of smoke before…
- [NTSB SEA88LA188](https://openairdocs.org/ntsb/SEA88LA188.md): Svensson Bushby Mustang II · Everett, WA · Accident · 2 fatal · Limited investigation · Final report · Sep 24, 1988 · N7SV · Destroyed
  > Just prior to the acdnt, witnesses saw the acft in a steep, high speed descent. Impact occurred in soft, marshy terrain & much of the wreckage was buried. No mechanical reason was found for a loss of control; however, the acft was extensively damaged drg…
- [NTSB NYC88DHA04](https://openairdocs.org/ntsb/NYC88DHA04.md): Banks/Mong Sport · Marshalls Creek, PA · Accident · 1 fatal · Final report · Sep 8, 1988 · N25JJ · Substantial damage
  > The homebuilt airplane impacted the ground in a steep nose down attitude among three tall pine trees. After impact, it bounced back about three feet & came to rest. There was no damage to the trees. An exam of the prop revealed no evidence of the engine…
- [NTSB LAX88FAMS3](https://openairdocs.org/ntsb/LAX88FAMS3.md): Cessna 172P · Kauai, HI · Accident · 3 fatal · Missing aircraft · Final report · Sep 3, 1988 · N51886 · Destroyed
  > The pilot departed for honolulu, HI after flying for 3 hours, 45 minutes without refueling. The flight to honolulu takes 1 hour. The airplane has a full fuel endurance of four hours. It disappeared from navy radar 25 miles southeast of Kauai. Acft wreckage…
- [NTSB FTW88DRD20](https://openairdocs.org/ntsb/FTW88DRD20.md): Alon A2A · New Orleans, LA · Accident · 1 fatal · Final report · Aug 24, 1988 · N5626F · Destroyed
  > The highly modified airplane was observed in a near vertical dive before it impacted into a marsh. No mechanical or medical reasons were found for the crash. Although toxicological analysis indicated a blood alcohol level of.11%, there was evidence of…
- [NTSB MIA88FA254](https://openairdocs.org/ntsb/MIA88FA254.md): Cessna 172E · Floweree, MS · Accident · 1 fatal · Field investigation · Final report · Aug 13, 1988 · N5555T · Destroyed
  > The student pilot departed early in the morning and was not found until the next afternoon. There were no witnesses to the accident. The aircraft impacted the ground in a 50 degree nose down angle at a high rate of speed with evidence of aircraft rotation…
- [NTSB CHI88FA190](https://openairdocs.org/ntsb/CHI88FA190.md): Mcdonnell Douglas 269B · Braceville, IL · Accident · 2 fatal · Field investigation · Final report · Aug 2, 1988 · N9522F · Destroyed
  > Conducting maneuvering flight the PIC failed to monitor the helicopter systems and allowed the main rotor RPM to decay to the point where it would not produce enough lift to sustain flight.
- [NTSB MIA88FA232](https://openairdocs.org/ntsb/MIA88FA232.md): Rockwell S2R · O'Brien, FL · Accident · 1 fatal · Field investigation · Final report · Jul 24, 1988 · N4222X · Destroyed
  > The purpose of the flt was to spray a soybean field about 1/2 mi n of the airstrip. There are no known witnesses to the crash, but a person in the area heard the eng 'pop', then eng sound ceased; seconds later the sound of impact was heard. The acft struck…
- [NTSB DEN88LA162](https://openairdocs.org/ntsb/DEN88LA162.md): Cessna 177RG · Santa Teresa, NM · Accident · No injuries · Limited investigation · Final report · Jul 17, 1988 · N34338 · Substantial damage
  > An unknown person or persons took a Cessna 177RG from a small airport near the mexican border, without permission. State police found it crashed in a field 2 miles southwest of Santa Teresa airport, and notified the owner. No witnesses have been found to…

Next page: https://openairdocs.org/ntsb-phases/990/cases.md?page=24

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
WITH phase_names(main, name) AS (VALUES (100, 'Prior to flight'), (150, 'Standing'), (200, 'Pushback/towing'), (250, 'Taxi'), (300, 'Takeoff'), (350, 'Initial climb'), (400, 'Enroute'), (450, 'Maneuvering'), (500, 'Approach'), (550, 'Landing'), (600, 'Emergency descent'), (650, 'Uncontrolled descent'), (700, 'Post-impact'), (750, 'After landing'), (800, 'Other'), (990, 'Unknown')),
  crosswalk(code, main, name) AS (VALUES (500, 150, 'Standing'), (501, 150, 'Standing - pre-flight'), (502, 150, 'Standing - starting engine(s)'), (503, 150, 'Standing - engine(s) operating'), (504, 150, 'Standing - engine(s) not operating'), (505, 150, 'Standing - idling rotors'), (510, 250, 'Taxi'), (511, 200, 'Taxi - pushback/tow'), (512, 250, 'Taxi - to takeoff'), (513, 250, 'Taxi - from landing'), (514, 250, 'Taxi - aerial'), (520, 300, 'Takeoff'), (521, 300, 'Takeoff - roll/run'), (522, 350, 'Takeoff - initial climb'), (523, 300, 'Takeoff - aborted'), (530, 400, 'Climb'), (531, 400, 'Climb - to cruise'), (540, 400, 'Cruise'), (541, 400, 'Cruise - normal'), (542, 400, 'Maneuvering - holding (IFR)'), (550, 400, 'Descent'), (551, 400, 'Descent - normal'), (552, 600, 'Descent - emergency'), (553, 650, 'Descent - uncontrolled'), (560, 500, 'Approach'), (561, 500, 'Approach - VFR pattern - downwind'), (562, 500, 'Approach - VFR pattern - base turn'), (563, 500, 'Approach - VFR pattern - base leg/base to final'), (564, 500, 'Approach - VFR pattern - final approach'), (565, 500, 'Go-around (VFR)'), (566, 500, 'Approach - IAF to FAF/outer marker (IFR)'), (567, 500, 'Approach - FAF/outer marker to threshold (IFR)'), (568, 500, 'Circling (IFR)'), (569, 500, 'Missed approach (IFR)'), (570, 550, 'Landing'), (571, 550, 'Landing - flare/touchdown'), (572, 550, 'Landing - roll'), (573, 550, 'Landing - aborted'), (574, 550, 'Emergency landing'), (575, 550, 'Emergency landing after takeoff'), (576, 600, 'Emergency descent/landing'), (580, 450, 'Maneuvering'), (581, 450, 'Maneuvering - aerial application'), (582, 450, 'Maneuvering - turn to reverse direction'), (583, 450, 'Maneuvering - turn to landing area (emergency)'), (590, 450, 'Hover'), (591, 450, 'Hover - in ground effect'), (592, 450, 'Hover - out of ground effect'), (600, 800, 'Other'), (610, 990, 'Unknown')),
  current_codes AS (
    SELECT e.case_mkey, TRY_CAST(e."tier1Number" AS INTEGER) AS code,
      row_number() OVER (PARTITION BY e.case_mkey ORDER BY coalesce(e."isDefiningEvent", false) DESC, e.position) AS n
    FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e
    WHERE e.aircrafts_position = 1 AND e."tier1Number" GLOB '[1-9][0-9]*'
      AND (e."isDefiningEvent" OR e.case_mkey IN (SELECT "mKey" FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' WHERE "isPre1982"))
  ),
  phases AS (
    SELECT case_mkey, 'current' AS scheme, code, CASE WHEN code >= 990 THEN 990 ELSE code // 50 * 50 END AS main
    FROM current_codes WHERE n = 1
    UNION ALL
    SELECT o.case_mkey, 'older', o."phaseOfFlightCode", w.main
    FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o JOIN crosswalk w ON w.code = o."phaseOfFlightCode"
    WHERE o.aircrafts_position = 1 AND o."occurrenceNumber" = 1 AND o.case_mkey NOT IN (SELECT case_mkey FROM current_codes)
  ),
  case_phases AS (
    SELECT p.*, c."eventDate", c."highestInjuryLevel" = 'Fatal' AS fatal, a.aircraft_model_code
    FROM phases p JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c."mKey" = p.case_mkey
    LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = p.case_mkey AND a.position = 1
    WHERE c."eventDate" >= DATE '1962-01-01' AND p.main IN (SELECT main FROM phase_names)
  )
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 case_mkey FROM case_phases WHERE main = 990)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/990/cases?page=23

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