# NTSB investigations: Enroute

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 263 of 718 · 35,885 cases

## Cases, newest first

- [NTSB LAX91FA281](https://openairdocs.org/ntsb/LAX91FA281.md): Cessna 182Q · Fillmore, CA · Accident · 2 fatal · Field investigation · Final report · Jun 28, 1991 · N759FY · Destroyed
  > Poor judgement by the pilot to continue VFR flight into instrument meteorological conditions. Contributing to the accident was IFR conditions that included low ceilings and low visibility and insufficient instrument training of the pilot to deal with the IFR…
- [NTSB LAX91LA279](https://openairdocs.org/ntsb/LAX91LA279.md): Piper PA 28-140 · Flagstaff, AZ · Accident · Minor injuries · Limited investigation · Final report · Jun 27, 1991 · N1898J · Substantial damage
  > Failure of the pilot-in-command to properly lock the engine primer control which resulted in an over rich fuel to air mixture and subsequent loss of engine power.
- [NTSB MIA91LA170](https://openairdocs.org/ntsb/MIA91LA170.md): Grumman G-164A · Falcon, MS · Accident · Minor injuries · Limited investigation · Final report · Jun 26, 1991 · N8942H · Substantial damage
  > In flight encounter with weather, high density altitude. Contributing to the accident was aircraft gross weight which was exceeded.
- [NTSB DEN91LA091](https://openairdocs.org/ntsb/DEN91LA091.md): Boeing E75N1 · Vail, CO · Accident · Minor injuries · Limited investigation · Final report · Jun 26, 1991 · N45747 · Substantial damage
  > A severe downdraft. A factor was: the pilot's failure to obtain a weather briefing.
- [NTSB MIA91LA168](https://openairdocs.org/ntsb/MIA91LA168.md): Piper PA-32-260 · Culebra, PR · Accident · Minor injuries · Limited investigation · Final report · Jun 25, 1991 · N5513J · Substantial damage
  > Oil exhaustion for undetermined reasons.
- [NTSB LAX91LA276](https://openairdocs.org/ntsb/LAX91LA276.md): Cessna 150M · Dana Point, CA · Accident · Minor injuries · Limited investigation · Final report · Jun 25, 1991 · N3674V · Substantial damage
  > The seizure of the no. 1 cylinder's exhaust valve in its guide and the related fracturing of the rocker arm; and the pilot's operation of the aircraft with known deficiencies.
- [NTSB BFO91LA058](https://openairdocs.org/ntsb/BFO91LA058.md): Cessna 172M · Beckley, WV · Accident · Minor injuries · Limited investigation · Final report · Jun 25, 1991 · N20430 · Destroyed
  > The pilot's failure to attain adequate flying speed.
- [NTSB ATL91FA124](https://openairdocs.org/ntsb/ATL91FA124.md): Piper PA-28 · Mt. Berry, GA · Accident · 2 fatal · Field investigation · Final report · Jun 25, 1991 · N91SM · Destroyed
  > The pilot's inadequate preflight planning, his poor inflight decision to continue into deteriorating weather conditions, and his inadvertent flight into IMC. Factors in this accident were: the clouds obscuring the mountain at the time of the accident, and the…
- [NTSB LAX91LA272](https://openairdocs.org/ntsb/LAX91LA272.md): Piper PA-28-181 · Rio Vista, CA · Accident · No injuries · Limited investigation · Final report · Jun 23, 1991 · N1029H · Substantial damage
  > Fuel exhaustion due to the pilots improper fuel consumption calculations and inadequate preflight planning.
- [NTSB LAX91LA269](https://openairdocs.org/ntsb/LAX91LA269.md): Green-Fowler Pazmany PL-1 · Wrightwood, CA · Accident · Serious injuries · Limited investigation · Final report · Jun 23, 1991 · N4081K · Destroyed
  > Fatigue fracture of one of the two propeller blades caused by the propeller modification and the non-approved propeller-engine combination. A factor in this accident was the transmission wires as an obstacle in the glide path during the attempted forced…
- [NTSB SEA91LA139](https://openairdocs.org/ntsb/SEA91LA139.md): Cessna 180G · Challis, ID · Accident · Minor injuries · Limited investigation · Final report · Jun 22, 1991 · N4700U · Substantial damage
  > That the pilot encountered unsuitable terrain during a forced landing after a power loss due to a fractured cylinder boss and a bent engine pushrod.
- [NTSB LAX91LA275](https://openairdocs.org/ntsb/LAX91LA275.md): Cessna C-152 · Las Vegas, NV · Accident · No injuries · Limited investigation · Final report · Jun 22, 1991 · N4607P · Substantial damage
  > Fuel exhaustion due to the failure of the pilot to ensure that an adequate fuel supply was on board the aircraft prior to departure.
- [NTSB LAX91LA273](https://openairdocs.org/ntsb/LAX91LA273.md): Piper PA-28 · Pacoima, CA · Accident · Serious injuries · Limited investigation · Final report · Jun 22, 1991 · N8745N · Destroyed
  > The pilot's improper preflight planning/preparation and his failure to attain the proper altitude.
- [NTSB FTW91LA107](https://openairdocs.org/ntsb/FTW91LA107.md): Cessna 150G · San Angelo, TX · Accident · No injuries · Limited investigation · Final report · Jun 22, 1991 · N2424J · Substantial damage
  > The pilot's failure to refuel the airplane which resulted in engine failure due to fuel exhaustion.
- [NTSB FTW91LA106](https://openairdocs.org/ntsb/FTW91LA106.md): Rockwell 112TC · Ovilla, TX · Accident · Minor injuries · Limited investigation · Final report · Jun 21, 1991 · N4596W · Substantial damage
  > The mechanical failure of the turbocharger. Factors were the inadequate annual inspection and the pilot's improper flare in the forced landing.
- [NTSB ATL91FA116](https://openairdocs.org/ntsb/ATL91FA116.md): Beech 95-B55 · Irmo, SC · Accident · 1 fatal · Field investigation · Final report · Jun 21, 1991 · N36743 · Destroyed
  > The loss of control of the aircraft for undetermined reason(s).
- [NTSB FTW91LA105](https://openairdocs.org/ntsb/FTW91LA105.md): Sikorsky 58H · Corsicana, TX · Accident · No injuries · Limited investigation · Final report · Jun 20, 1991 · N4582B · Substantial damage
  > Failure of the magneto. Factors were the helicopter's position over water, the tailwind, and the inadequate main rotor RPM prior to touchdown.
- [NTSB LAX91LA266](https://openairdocs.org/ntsb/LAX91LA266.md): Grumman HU-16E · Pacific Ocean (Pacific Ocean) · Accident · Serious injuries · Limited investigation · Final report · Jun 19, 1991 · N7029C · Destroyed
  > Improper touchdown in the water causing substantial damage. Loss of power on the number 2 engine and the pilot's lack of qualifications were factors in the accident.
- [NTSB CHI91LA196](https://openairdocs.org/ntsb/CHI91LA196.md): Cessna 172RG · Hawley, MN · Accident · No injuries · Limited investigation · Final report · Jun 19, 1991 · N9431D · Substantial damage
  > Inattentiveness of both the flight instructor and the student pilot, and failure to use carburetor heat. A factor related to the accident is the unsuitable terrain encountered during the forced landing.
- [NTSB LAX91LA265](https://openairdocs.org/ntsb/LAX91LA265.md): Glasair SH-2-RG · Visalia, CA · Accident · Minor injuries · Limited investigation · Final report · Jun 18, 1991 · N306AT · Substantial damage
  > Total loss of engine power due to the failure of the number 4 engine exhaust valve.
- [NTSB LAX91LA262](https://openairdocs.org/ntsb/LAX91LA262.md): Cessna 152 · Oceanside, CA · Accident · No injuries · Limited investigation · Final report · Jun 17, 1991 · N747CM · Destroyed
  > Fuel exhaustion due to the pilot's improper preflight planning.
- [NTSB SEA91LA134](https://openairdocs.org/ntsb/SEA91LA134.md): Luscombe 8E · Rock Springs, WY · Accident · Minor injuries · Limited investigation · Final report · Jun 16, 1991 · N2587K · Substantial damage
  > The pilot's inadequate preflight planning and decision to attempt flights in unfavorable environmental codnitions. The environmental conditions were factors in the accident.
- [NTSB LAX91LA274](https://openairdocs.org/ntsb/LAX91LA274.md): Ryan ST3KR · Santa Maria, CA · Accident · No injuries · Limited investigation · Final report · Jun 16, 1991 · N46795 · Substantial damage
  > Oil starvation due to the pilot's failure to properly configure the aircraft for the flight during the preflight inspection.
- [NTSB LAX91LA260](https://openairdocs.org/ntsb/LAX91LA260.md): Piper PA-22-135 · Sonita, AZ · Accident · No injuries · Limited investigation · Final report · Jun 16, 1991 · N1429C · Substantial damage
  > A loss of engine power due to a broken piston ring in the number 3 cylinder, which resulted in the aircraft's inability to maintain level flight.
- [NTSB BFO91LA055](https://openairdocs.org/ntsb/BFO91LA055.md): Boeing 747-400 · Philadelphia, PA · Accident · Serious injuries · Limited investigation · Final report · Jun 16, 1991 · PHBFG · No damage
  > Failure of the pilot to ensure cabin crew members were prepared for an encounter with turbulence.
- [NTSB ATL91LA112](https://openairdocs.org/ntsb/ATL91LA112.md): Piper PA-12 · Conway, SC · Accident · No injuries · Limited investigation · Final report · Jun 15, 1991 · N2GV · Substantial damage
  > Failure of the number two exhaust valve, which resulted in loss of engine power.
- [NTSB ANC91LA074](https://openairdocs.org/ntsb/ANC91LA074.md): Cessna A185E · King Salmon, AK · Accident · No injuries · Limited investigation · Final report · Jun 15, 1991 · N70148 · Substantial damage
  > Fuel exhaustion, the pilot's inadequate preflight and the inadequate fuel consumption calculations. Contributing to the accident was the soft terrain, and tundra.
- [NTSB DEN91FA083](https://openairdocs.org/ntsb/DEN91FA083.md): Schempp-Hirth Ventus C · Durango, CO · Accident · 1 fatal · Field investigation · Final report · Jun 13, 1991 · N418CH · Destroyed
  > The absence of thermal lift, the pilot's apprehension, and his lack of familiarity with the geographic area.
- [NTSB CHI91LA189](https://openairdocs.org/ntsb/CHI91LA189.md): Cessna 180 · Wausa, NE · Accident · Serious injuries · Limited investigation · Final report · Jun 13, 1991 · N1721C · Substantial damage
  > The pilot's delayed decision to turn around after encountering IFR flight conditions. Factors were restricted forward visibility and power lines.
- [NTSB CHI91DCQ06](https://openairdocs.org/ntsb/CHI91DCQ06.md): Piper PA-36-300 · Oakley, KS · Accident · No injuries · Final report · Jun 13, 1991 · N59661 · Substantial damage
  > A loss of engine power for an undetermined reason(s).
- [NTSB BFO91LA054](https://openairdocs.org/ntsb/BFO91LA054.md): Grumman AA-1C · Union Hall, VA · Accident · No injuries · Limited investigation · Final report · Jun 13, 1991 · N9755U · Substantial damage
  > The loss of engine power brought on by a failure of the number three clyinder exhaust valve. Contributing to the accident was a hidden object on the emergency landing field.
- [NTSB ANC91LA073](https://openairdocs.org/ntsb/ANC91LA073.md): Cessna 180 · Pilot Point, AK · Accident · No injuries · Limited investigation · Final report · Jun 13, 1991 · N420SB · Substantial damage
  > Fuel exhaustion, due to the Pilot's inadequate preflight. Contributing to the accident was the soft and rough terrain.
- [NTSB MIA91LA161](https://openairdocs.org/ntsb/MIA91LA161.md): Cessna 172K · Jacksonville, FL · Accident · No injuries · Limited investigation · Final report · Jun 12, 1991 · N79542 · Substantial damage
  > Total loss of engine power due to fatigue failure of the oil cooler resulting in oil exhaustion. Contributing to the accident was lack of suitable terrain.
- [NTSB LAX91LA243](https://openairdocs.org/ntsb/LAX91LA243.md): Cessna 182E · Eureka, CA · Accident · 2 fatal · Limited investigation · Final report · Jun 10, 1991 · N3046Y · Destroyed
  > The non-instrument rated pilot's inadvertent flight into IMC conditions. The pilot's lack of total experience, his disregard to the preflight meteorological briefing he received, low ceilings, fog, and the mountainous terrain over which the flight was…
- [NTSB CHI91LA184](https://openairdocs.org/ntsb/CHI91LA184.md): Piper PA-28-140 · Grass Lake, MI · Accident · Minor injuries · Limited investigation · Final report · Jun 9, 1991 · N7470R · Substantial damage
  > A ruptured oil cooler line. A factor associated with the accident was the lack of suitable terrain for the precautionary landing.
- [NTSB LAX91LA255](https://openairdocs.org/ntsb/LAX91LA255.md): Cessna 172N · Thermal, CA · Accident · Minor injuries · Limited investigation · Final report · Jun 8, 1991 · N6230D · Substantial damage
  > The partial failure of the engine/powerplant from a worn intake valve and the failure of company/operator management to perform an overhaul on the engine within the time frame recommended by the engine manufacturer.
- [NTSB LAX91LA253](https://openairdocs.org/ntsb/LAX91LA253.md): North American T-28B · Hollister, CA · Accident · Minor injuries · Limited investigation · Final report · Jun 8, 1991 · N993CA · Destroyed
  > The pilot's intentional bailing out of his airplane. Contributing factors are related to the possible onset of a rough running engine.
- [NTSB CHI91LA185](https://openairdocs.org/ntsb/CHI91LA185.md): Ryan Navion A · Kankakee, IL · Accident · Serious injuries · Limited investigation · Final report · Jun 8, 1991 · N4374K · Substantial damage
  > The pilot's poor in flight planning/decision making and misjudged fuel supply. A related factor is the inadequate emergency procedure.
- [NTSB CHI91DEP07](https://openairdocs.org/ntsb/CHI91DEP07.md): Cessna 182M · Wissota, WI · Accident · No injuries · Final report · Jun 8, 1991 · N91691 · Substantial damage
  > The pilot in command's misjudgment of the proper touchdown point during an emergency landing and the pilot in command's failure to refuel the airplane.
- [NTSB NYC91LA151](https://openairdocs.org/ntsb/NYC91LA151.md): Aerofab 4/210 · Paulding, OH · Accident · No injuries · Limited investigation · Final report · Jun 7, 1991 · N516L · Substantial damage
  > The improper installation of the oil filter by the pilot which resulted in a leak and subsequent oil exhaustion.
- [NTSB LAX91LA249](https://openairdocs.org/ntsb/LAX91LA249.md): Hiller UH-12E · Huron, CA · Accident · No injuries · Limited investigation · Final report · Jun 7, 1991 · N507HA · Substantial damage
  > That unknown pilot(s) impoperly used the throttle control which caused an overspeed condition. Contributing to this accident was the connecting rod bolt fatigue failure.
- [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 SEA91LA126](https://openairdocs.org/ntsb/SEA91LA126.md): Boeing 737-3G7 · Elko, NV · Accident · Serious injuries · Limited investigation · Final report · Jun 6, 1991 · N304AW · No damage
  > An unsecured cart. The factors to the accident were: turbulent weather conditions, and poor judgement by the flight attendant.
- [NTSB CHI91FA181](https://openairdocs.org/ntsb/CHI91FA181.md): Cessna U206F · Muskegon, MI · Accident · 2 fatal · Field investigation · Final report · Jun 6, 1991 · N713OX · Destroyed
  > Inadequate remedial action by the pilot after exhausting all the fuel from a selected fuel tank. Factors associated with the accident are the pilots inadequate transition and upgrade training and a lack of familiarity with the accident airplane.
- [NTSB ANC91LA066](https://openairdocs.org/ntsb/ANC91LA066.md): Cessna 207A · Eek, AK · Accident · No injuries · Limited investigation · Final report · Jun 6, 1991 · N6255H · Substantial damage
  > Was fuel contamination. Contributing factors are the engine vibrations and the rough vegetation upon which the airplane landed.
- [NTSB MIA91FA160](https://openairdocs.org/ntsb/MIA91FA160.md): Piper PA38-112 · South Port, FL · Accident · 1 fatal · Field investigation · Final report · Jun 5, 1991 · N2549A · Destroyed
  > The pilot in commands failure to maintain a safe altitude resulting in an inflight collision with electrical lines.
- [NTSB LAX91LA240](https://openairdocs.org/ntsb/LAX91LA240.md): Piper PA38-112 · Stockton, CA · Accident · No injuries · Limited investigation · Final report · Jun 3, 1991 · N9283T · Substantial damage
  > That the pilot-in-command used poor preflight planning, inflight decision, and fuel consumption calculations. Contributing to this accident was fuel exhaustion.
- [NTSB DEN91FA079](https://openairdocs.org/ntsb/DEN91FA079.md): Cessna 210M · Colorado City, TX · Accident · 2 fatal · Field investigation · Final report · Jun 3, 1991 · N777DH · Destroyed
  > The pilot continuing flight into known adverse weather conditions and exceeding the design stress limits of the aircraft. Factors were: thunderstorm, updrafts and the pilot's disregard of the weather briefing.
- [NTSB LAX91LA238](https://openairdocs.org/ntsb/LAX91LA238.md): Bellanca 7FC · Sedona, AZ · Accident · Serious injuries · Limited investigation · Final report · Jun 2, 1991 · N8527E · Destroyed
  > The total loss of engine power for undetermined reasons resulting in a forced landing and on ground collision with a berm.
- [NTSB FTW91FA089](https://openairdocs.org/ntsb/FTW91FA089.md): Steen Skybolt JW5 · Grand Prairie, TX · Accident · 2 fatal · Field investigation · Final report · Jun 2, 1991 · N124J · Destroyed
  > The pilot's failure to perform refueling and maintain airspeed above vs (stall). A factor was unsuitable terrain.

Next page: https://openairdocs.org/ntsb-phases/400/cases.md?page=264

## 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 = 400)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/400/cases?page=263

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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.