# 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 264 of 718 · 35,885 cases

## Cases, newest first

- [NTSB LAX91LA236](https://openairdocs.org/ntsb/LAX91LA236.md): Bellanca 17-30 · Fort Ord, CA · Accident · No injuries · Limited investigation · Final report · Jun 1, 1991 · N4SH · Substantial damage
  > Partial loss of engine power for undetermined reasons.
- [NTSB LAX91LA233](https://openairdocs.org/ntsb/LAX91LA233.md): Cessna 172RG · Point Magu, CA · Accident · Minor injuries · Limited investigation · Final report · Jun 1, 1991 · N9663B · Substantial damage
  > A short circuit in the airplane's strobe light electrical system which ignited the plastic tubing of the pitot static system causing an inflight fire and subsequent forced landing.
- [NTSB LAX91FA232](https://openairdocs.org/ntsb/LAX91FA232.md): Piper PA-23 · Maricopa, AZ · Accident · 2 fatal · Field investigation · Final report · Jun 1, 1991 · N1237P · Destroyed
  > The pilot's poor judgement in the operation of the airplane with known deficiencies and the inadvertent stall during a forced landing. The pilot/owners lack of maintenance on the airplane and the pilot's impairment by alcohol were factors in the accident.
- [NTSB MIA91FA155](https://openairdocs.org/ntsb/MIA91FA155.md): Piper PA-24-250 · Long Boat Key, FL · Accident · 2 fatal · Field investigation · Final report · May 31, 1991 · N6376P · Destroyed
  > An inflight loss of control and subsequent collision with the water for unknown reasons.
- [NTSB CHI91LA178](https://openairdocs.org/ntsb/CHI91LA178.md): Cessna 172E · Grundy Center, IA · Accident · No injuries · Limited investigation · Final report · May 31, 1991 · N3663S · Substantial damage
  > Failure by other maintenance personnel to install a safety wire and fuel exhaustion.
- [NTSB CHI91IA175](https://openairdocs.org/ntsb/CHI91IA175.md): Douglas DC-9-32 · Kansas City, MO · Incident · Minor injuries · Incident investigation · Final report · May 29, 1991 · N933ML · No damage
  > Inadequate design by the manufacturers. Factors associated with the incident are inadequate certification/approval by the federal aviation administration and clear air turbulence.
- [NTSB CHI91LA167](https://openairdocs.org/ntsb/CHI91LA167.md): Beech C-23 · Cottage Grove, MN · Accident · Minor injuries · Limited investigation · Final report · May 28, 1991 · N5172M · Substantial damage
  > The pilot in command's improper pre flight planning and preparation. Factors contributing to this accident were the pilot in command's lack of familiarity with the airplane and improper fuel consumption calculations.
- [NTSB SEA91LA117](https://openairdocs.org/ntsb/SEA91LA117.md): Cessna T-210N · Klamath Falls, OR · Accident · Minor injuries · Limited investigation · Final report · May 27, 1991 · N5375A · Substantial damage
  > The loss of engine power due to failure of the number 5 cylinder rod bearing which resulted from lack of lubrication of the main bearing.
- [NTSB MIA91LA154](https://openairdocs.org/ntsb/MIA91LA154.md): Larocque, Raymond E. VARI-EZE · Lake Placid, FL · Accident · Serious injuries · Limited investigation · Final report · May 27, 1991 · N1344Z · Substantial damage
  > Improper fuel selector position by the pilot-in-command resulting in the total loss of engine power due to fuel starvation.
- [NTSB LAX91LA227](https://openairdocs.org/ntsb/LAX91LA227.md): Cessna R172K · Santa Clarita, CA · Accident · No injuries · Limited investigation · Final report · May 27, 1991 · N736MR · Substantial damage
  > Fuel exhaustion due to the failure of the pilot to properly perform preflight planning and to ensure that an adequate fuel supply existed for the flight.
- [NTSB NYC91DGT05](https://openairdocs.org/ntsb/NYC91DGT05.md): Alexander Schleicher ASW-24 · Beaver Springs, PA · Accident · Minor injuries · Final report · May 26, 1991 · N24SN · Substantial damage
  > The pilot's loss of control in flight as the result of a strong downdraft and wind shift.
- [NTSB FTW91DRD05](https://openairdocs.org/ntsb/FTW91DRD05.md): Bell 47-D1 · Sun, LA · Accident · No injuries · Final report · May 26, 1991 · N339MC · Substantial damage
  > The total loss of power for undetermined reasons and the failure of the pilot to maintain rotor RPM. A factor was the lack of suitable terrain.
- [NTSB MIA91LA152](https://openairdocs.org/ntsb/MIA91LA152.md): Piper PA-28-140 · Flamingo, FL · Accident · Minor injuries · Limited investigation · Final report · May 25, 1991 · N56118 · Substantial damage
  > Partial loss of engine power due to failure of the no. 3 cylinder exhaust valve for undetermined reasons. Contributing to the accident was lack of suitable terrain during the forced landing.
- [NTSB MIA91LA151](https://openairdocs.org/ntsb/MIA91LA151.md): Beech 80 · Fort Lauderdale, FL · Accident · Minor injuries · Limited investigation · Final report · May 25, 1991 · N5128Y · Destroyed
  > The improper maintenance work by an unknown person who crossthreaded a fuel nozzle injector fitting which allowed fuel to leak on the exhaust system initiating a fire. No reason for the right engine not to develop full power was found.
- [NTSB LAX91FA222](https://openairdocs.org/ntsb/LAX91FA222.md): Cessna 150K · El Cerrito, CA · Accident · 1 fatal · Field investigation · Final report · May 24, 1991 · N6003G · Destroyed
  > Fuel exhaustion due to improper preflight planning and inaccurate fuel consumption calculations. Factors related to the accident were the failure of the pilot to choose a proper emergency landing site and/or deviate from a straight course during the emergency…
- [NTSB NYC91LA139](https://openairdocs.org/ntsb/NYC91LA139.md): Beech BE-23-B24R · Caribou, ME · Accident · No injuries · Limited investigation · Final report · May 23, 1991 · N6968R · Substantial damage
  > The failure of the engine driven fuel pump, which resulted in a total loss of engine power and subsequent forced landing on rough terrain. Factors related to the accident were the decision by the pilot to takeoff with known mechanical deficiencies; the…
- [NTSB MIA91LA150](https://openairdocs.org/ntsb/MIA91LA150.md): Cessna 152 · Jacksonville, FL · Accident · No injuries · Limited investigation · Final report · May 23, 1991 · N6495L · Substantial damage
  > Partial loss of engine power due to fuel exhaustion due to misjudged fuel consumption calculations.
- [NTSB ANC91LA060](https://openairdocs.org/ntsb/ANC91LA060.md): Hughes 500-D · Togiak, AK · Accident · No injuries · Limited investigation · Final report · May 22, 1991 · N5314D · Substantial damage
  > The pilot's failure to secure the cargo prior to the flight. Contributing to the accident was the rough, uneven terrain.
- [NTSB ANC91DAG02](https://openairdocs.org/ntsb/ANC91DAG02.md): David K. Maxwell MAX-1 · Sutton, AK · Accident · Serious injuries · Final report · May 22, 1991 · N4921S · Substantial damage
  > The pilot's failure in maintaining airspeed and not identifying the stall during the descent for landing.
- [NTSB LAX91LA220](https://openairdocs.org/ntsb/LAX91LA220.md): Piper PA-23-250 · Gasquet, CA · Accident · 2 fatal · Limited investigation · Final report · May 20, 1991 · N49DB · Destroyed
  > The pilot's decision to attempt VFR flight in a narrow mountain valley in conditions of low ceilings and mountain obscurement.
- [NTSB CHI91FA160](https://openairdocs.org/ntsb/CHI91FA160.md): Cessna 210 · Belleville, MI · Accident · 1 fatal · Field investigation · Final report · May 20, 1991 · N9656T · Destroyed
  > Failure of the engine driven fuel pump, the failure of the pilot to activate the electric auxiliary fuel pump, poor inflight decision, and poor execution of emergency procedures. A factor relating to the accident is the pilot's lack of experience in this…
- [NTSB LAX91LA218](https://openairdocs.org/ntsb/LAX91LA218.md): Cessna 152 · Richmond, CA · Accident · No injuries · Limited investigation · Final report · May 18, 1991 · N6507H · Substantial damage
  > Loss of engine power due to carburetor ice. A factor in the accident was the failure of the instructor to properly supervise the conduct of the flight.
- [NTSB FTW91LA082](https://openairdocs.org/ntsb/FTW91LA082.md): Cessna 210L · Marked Tree, AR · Accident · No injuries · Limited investigation · Final report · May 17, 1991 · N29163 · Substantial damage
  > The failure of the engine piston and connecting rod. A factor was the wet landing area.
- [NTSB BFO91FA049](https://openairdocs.org/ntsb/BFO91FA049.md): Cessna 172N · Lebanon, NH · Accident · 1 fatal · Field investigation · Final report · May 17, 1991 · N4650G · Destroyed
  > The pilot's failure to maintain adequate terrain clearance. Contributing was mountainous terrain, low clouds, and VFR flight into IMC.
- [NTSB SEA91LA106](https://openairdocs.org/ntsb/SEA91LA106.md): Beech A36 · Rawlins, WY · Accident · No injuries · Limited investigation · Final report · May 16, 1991 · N6724T · Substantial damage
  > The pilot's lack of familiarity with the aircraft, his lack of understanding of the electrical system, and a premature precautionary landing. Contributing to the accident were an alternator failure and the resultant false readings of the powerplant…
- [NTSB LAX91LA216](https://openairdocs.org/ntsb/LAX91LA216.md): Cessna C-150L · Groveland, CA · Accident · No injuries · Limited investigation · Final report · May 16, 1991 · N6583G · Substantial damage
  > The pilots neglect to calculate the aircrafts fuel consumption and his failure to service the aircraft with fuel prior to the last takeoff. The wire across the aircrafts flight path during the forced landing was a factor in the accident.
- [NTSB FTW91FA080](https://openairdocs.org/ntsb/FTW91FA080.md): Beech V35B · Manor, TX · Accident · 4 fatal · Field investigation · Final report · May 16, 1991 · N9435Q · Destroyed
  > The pilot's operation of the aircraft at a gross weight and center of gravity which exceeded the certificated operating limitations, resulting in loss of control and structural overload. Turbulence was a related factor.
- [NTSB NYC91LA135](https://openairdocs.org/ntsb/NYC91LA135.md): Cessna 152 II · Newtonville, NJ · Accident · No injuries · Limited investigation · Final report · May 15, 1991 · N94512 · Substantial damage
  > Pilot factor in that the student pilot delayed asking for assistance, after becoming lost until insufficient fuel was available to make an airport. This resulted in engine failure to fuel exhaustion and a subsequent emergency landing in rough terrain.
- [NTSB NYC91DGT03](https://openairdocs.org/ntsb/NYC91DGT03.md): Bell 47-G3B1 · Hughesville, PA · Accident · Serious injuries · Final report · May 15, 1991 · N2619B · Destroyed
  > The loss of engine power for undetermined reasons and the pilot's selection of the forced landing area.
- [NTSB LAX91FA213](https://openairdocs.org/ntsb/LAX91FA213.md): Cessna 207A · Grand Canyon, AZ · Accident · 7 fatal · Field investigation · Final report · May 13, 1991 · N6280H · Destroyed
  > Detonation (or pre-ignition) in the number 1 cylinder, which resulted in erosion (burning) of the number 1 piston and subsequent loss of engine power. A factor related to the accident was: the lack of suitable terrain for an emergency landing.
- [NTSB NYC91LA234](https://openairdocs.org/ntsb/NYC91LA234.md): Cessna 185F · Sanford, ME · Accident · Minor injuries · Limited investigation · Final report · May 12, 1991 · N1745R · Substantial damage
  > The pilot's improper procedure by not placing the fuel selector on the tank with the most fuel, which resulted in fuel starvation and a forced landing in trees.
- [NTSB MIA91LA143](https://openairdocs.org/ntsb/MIA91LA143.md): Cessna 152 · Yazoo City, MS · Accident · No injuries · Limited investigation · Final report · May 12, 1991 · N65619 · Substantial damage
  > Poor planning decision by the student pilot, improper fuel calculations, resulting in fuel exhaustion due to an inadequate fuel supply. Contributing to the accident was overconfidence in his own personal ability by the student pilot.
- [NTSB LAX91LA212](https://openairdocs.org/ntsb/LAX91LA212.md): Piper PA-28-181 · Catalina Island, CA · Accident · No injuries · Limited investigation · Final report · May 12, 1991 · N4291V · Substantial damage
  > The pilot's inadequate altitude and intentional low flying which resulted in the airplane cruising into the water. A contributing factor related to the pilot's poor judgment.
- [NTSB SEA91LA103](https://openairdocs.org/ntsb/SEA91LA103.md): Cessna 182N · Shelton, WA · Accident · No injuries · Limited investigation · Final report · May 11, 1991 · N8949G · Substantial damage
  > The total loss of power due to mechanical failure when the pilot was over unsuitable terrain for a forced landing. Factors include a hard landing after an inadvertent stall prior to touchdown on a highway.
- [NTSB NYC91LA129](https://openairdocs.org/ntsb/NYC91LA129.md): Cessna 210L · Lumberton, NJ · Accident · Serious injuries · Limited investigation · Final report · May 11, 1991 · N732BU · Substantial damage
  > The pilot's failure to maintain airspeed and the resultant inadvertent stall. A factor in the accident was the loose oil filter.
- [NTSB NYC91LA128](https://openairdocs.org/ntsb/NYC91LA128.md): Piper PA-34-200T · Arcadia, RI · Accident · No injuries · Limited investigation · Final report · May 11, 1991 · N1193X · Substantial damage
  > Inadequate preflight by the pilot, and fuel exhaustion due to an inadequate supply of fuel. A factor related to the accident was: the lack of a suitable area for a forced landing.
- [NTSB FTW91LA079](https://openairdocs.org/ntsb/FTW91LA079.md): Cessna 150 · Raymondsville, TX · Accident · No injuries · Limited investigation · Final report · May 11, 1991 · N5759G · Destroyed
  > Oil exhaustion for undetermined reason. A factor was the soft terrain.
- [NTSB MIA91LA139](https://openairdocs.org/ntsb/MIA91LA139.md): Cessna TU-206G · Gulf Of Mexico · Accident · 1 fatal · Limited investigation · Final report · May 9, 1991 · N6567Z · Destroyed
  > An in flight collision with the water for undetermined reasons.
- [NTSB DEN91LA069](https://openairdocs.org/ntsb/DEN91LA069.md): Challenger II · Silt, CO · Accident · 1 fatal · Limited investigation · Final report · May 9, 1991 · N425DE · Destroyed
  > An in flight encounter with wind conditions which exceeded the aircraft performance capability. A factor was: the pilot's failure to obtain available en route weather information.
- [NTSB CHI91DEM05](https://openairdocs.org/ntsb/CHI91DEM05.md): Gildersleeve RV-4 · Ionia, MI · Accident · Serious injuries · Final report · May 9, 1991 · N188BG · Substantial damage
  > Remedial action not performed by the pilot and the pilot's failure to assure the fuel selector was on the proper tank.
- [NTSB FTW91DRA01](https://openairdocs.org/ntsb/FTW91DRA01.md): Rockwell S2R-600 · Beaumont, TX · Accident · No injuries · Final report · May 8, 1991 · N4228X · Substantial damage
  > The failure of the engine for undetermined reasons. Factors were the lack of suitable terrain for a forced landing and the rough terrain that was encountered.
- [NTSB SEA91FA099](https://openairdocs.org/ntsb/SEA91FA099.md): Piper PA-34-200T · Ravensdale, WA · Accident · 1 fatal · Field investigation · Final report · May 7, 1991 · N2859M · Destroyed
  > The in-flight breakup of the airplane as a result of the pilot exceeding the speed and stress limits for the airplane. A factor relating to the accident was the center of gravity loading that exceeded the aft limits.
- [NTSB FTW91FA074](https://openairdocs.org/ntsb/FTW91FA074.md): Mitsubishi MU-2B-20 · Kenefic, OK · Accident · 1 fatal · Field investigation · Final report · May 7, 1991 · N106MA · 2 aircraft · Destroyed
  > Improper planning/decision by the pilots of both aircraft, and the Mitsubishi pilot's misjudgment of his position, while attempting to fly formation at night with an aircraft that did not have all navigation lights operative. Factors related to the accident…
- [NTSB DEN91FA068](https://openairdocs.org/ntsb/DEN91FA068.md): Bell 206B-3 · Houston, TX · Accident · Serious injuries · Field investigation · Final report · May 7, 1991 · N717NH · Destroyed
  > Engine mount delamination and lack lubrication, causing the drive shaft to fail. Poor servicing of the helicopter was a related factor.
- [NTSB LAX91LA199](https://openairdocs.org/ntsb/LAX91LA199.md): Cessna 182 · Phoenix, AZ · Accident · No injuries · Limited investigation · Final report · May 6, 1991 · N4996D · Substantial damage
  > That the pilot failed to properly preflight the airplane to assure the engine contained an adequate oil supply. Contributing to this accident was total failure of the connecting rod due to lack of lubrication.
- [NTSB DEN91FA067](https://openairdocs.org/ntsb/DEN91FA067.md): Beech A-36 · Hartley, TX · Accident · 1 fatal · Field investigation · Final report · May 6, 1991 · N1093B · Destroyed
  > Undetermined.
- [NTSB NYC91DGT02](https://openairdocs.org/ntsb/NYC91DGT02.md): Kolb Twinstar · Williamsport, PA · Accident · Minor injuries · Final report · May 5, 1991 · N94MW · Substantial damage
  > An engine seizure as the result of overheating.
- [NTSB LAX91LA198](https://openairdocs.org/ntsb/LAX91LA198.md): Hughes 369HS · Keanae, HI · Accident · Minor injuries · Limited investigation · Final report · May 5, 1991 · N9219F · Substantial damage
  > The total failure in fatigue of the helicopter's spur adapter gearshaft. A contributing factor was related to the lack of a suitable emergency landing site.
- [NTSB LAX91LA196](https://openairdocs.org/ntsb/LAX91LA196.md): Ercoupe 415C · King City, CA · Accident · Minor injuries · Limited investigation · Final report · May 5, 1991 · N99893 · Substantial damage
  > The total loss of engine power which resulted from the drain valve fitting on a newly installed gascolator dislodging during cruise flight.
- [NTSB LAX91LA191](https://openairdocs.org/ntsb/LAX91LA191.md): Hiller UH-12E · Delano, CA · Accident · No injuries · Limited investigation · Final report · May 4, 1991 · N4414 · Substantial damage
  > That the pilot improperly performed the autorotation by misjudging the flare altitude. Contributing to this accident was the total failure of the freewheeling sprag clutch due to excessive wear and the soft dirt terrain.

Next page: https://openairdocs.org/ntsb-phases/400/cases.md?page=265

## 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=264

---
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.