# 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 265 of 718 · 35,885 cases

## Cases, newest first

- [NTSB FTW91FA072](https://openairdocs.org/ntsb/FTW91FA072.md): Cessna 182A · Fentress, TX · Accident · Serious injuries · Field investigation · Final report · May 4, 1991 · N6172B · Substantial damage
  > The improper major modification of the airplane by the operator, and the resultant separation of the door, window and windshield. A factor was the installation of a non approved jump door.
- [NTSB BFO91LA047](https://openairdocs.org/ntsb/BFO91LA047.md): Aerospace Tech. of Australia N22B · Richardsville, KY · Accident · No injuries · Limited investigation · Final report · May 4, 1991 · N5590M · Substantial damage
  > The loss of engine power brought on by a failure of the no.2 main engine bearing. Contributing to the accident was the lack of sufficient power on the remaining engine to maintain level flight.
- [NTSB ATL91LA091](https://openairdocs.org/ntsb/ATL91LA091.md): Boeing B767-287ER · Memphis, TN · Accident · Serious injuries · Limited investigation · Final report · May 4, 1991 · N651US · No damage
  > The delayed inflight decision by the pilot to maneuver the aircraft away from thunderstorm activity.
- [NTSB SEA91LA097](https://openairdocs.org/ntsb/SEA91LA097.md): Grumman AA-1B · Douglas, WY · Accident · 1 fatal · Limited investigation · Final report · May 2, 1991 · N1412R · Destroyed
  > An inadvertent stall with inadequate terrain clearance. Factors include flight in mountainous terrain at an altitude where remedial action was not possible.
- [NTSB LAX91FA190](https://openairdocs.org/ntsb/LAX91FA190.md): Mooney M20F · Quincy, CA · Accident · 4 fatal · Field investigation · Final report · May 2, 1991 · N9624M · Destroyed
  > The pilot's inadvertent flight into IMC and thereafter his failure to maintain directional control of his airplane. Factors which contributed to the accident related to the pilot's improper weather evaluation which resulted in his delayed emergency procedure,…
- [NTSB ANC91LA054](https://openairdocs.org/ntsb/ANC91LA054.md): Maule M-4-220C · Beluga, AK · Accident · No injuries · Limited investigation · Final report · May 2, 1991 · N40676 · Substantial damage
  > The engine failure due to undetermined causes. Contributing to the accident was the unsuitability of the available landing area.
- [NTSB FTW91LA071](https://openairdocs.org/ntsb/FTW91LA071.md): Piper PA-28 · Longview, TX · Accident · No injuries · Limited investigation · Final report · May 1, 1991 · N29049 · Substantial damage
  > Fuel exhaustion resulting in a complete power loss due to the pic/cfi's failure to refuel at intermediate destinations.
- [NTSB DEN91FA065](https://openairdocs.org/ntsb/DEN91FA065.md): Piper PA-31B-310 · Bennett, CO · Accident · 1 fatal · Field investigation · Final report · May 1, 1991 · N7407L · Destroyed
  > In-flight separation of the left engine cowl assembly that was not properly latched, and failure of the pilot to maintain minimum control speed, which resulted in his loss of aircraft control. Factors related to the accident were: an inadequate preflight…
- [NTSB BFO91LA046](https://openairdocs.org/ntsb/BFO91LA046.md): Cessna 310D · Christiansburg, VA · Accident · Minor injuries · Limited investigation · Final report · May 1, 1991 · N6632T · Substantial damage
  > Inadequate maintenance. Contributing was an obstructed air filter.
- [NTSB NYC91IA133](https://openairdocs.org/ntsb/NYC91IA133.md): Boeing 747SP · Churchville, NY · Incident · No injuries · Incident investigation · Final report · Apr 29, 1991 · N148UA · Minor damage
  > A failure of the sixth rotating airseal which led to an uncontained engine failure.
- [NTSB LAX91LA188](https://openairdocs.org/ntsb/LAX91LA188.md): Enstrom F28C · Palm Springs, CA · Accident · Serious injuries · Limited investigation · Final report · Apr 29, 1991 · N214MM · Substantial damage
  > Inadequate inspection of the fuel system resulting in an engine power loss and inflight fire due to a loose fuel connection.
- [NTSB NYC91LA122](https://openairdocs.org/ntsb/NYC91LA122.md): Piper PA-28R-180 · Jessup, PA · Accident · Serious injuries · Limited investigation · Final report · Apr 27, 1991 · N4930J · Destroyed
  > A power loss due to oil starvation for unknown reasons, over unsuitable terrain.
- [NTSB NYC91LA121](https://openairdocs.org/ntsb/NYC91LA121.md): Cessna 172 · Meadville, PA · Accident · No injuries · Limited investigation · Final report · Apr 27, 1991 · N739EC · Substantial damage
  > The improper use of carburetor heat control by the pilot, which resulted in the total loss of engine power and the subsequent emergency forced landing in rough terrain. A factor relating to the accident was the lack of experience of the student pilot.
- [NTSB CHI91LA145](https://openairdocs.org/ntsb/CHI91LA145.md): Aeronca 7EC · O'Neill, NE · Accident · No injuries · Limited investigation · Final report · Apr 26, 1991 · N4652E · Substantial damage
  > The pilot's selection of unsuitable terrain for a precautionary landing. Factors were the pilot's disregarding the weather briefing and his intentional flight into adverse weather.
- [NTSB ATL91LA087](https://openairdocs.org/ntsb/ATL91LA087.md): Cessna 150 · Copperhill, TN · Accident · No injuries · Limited investigation · Final report · Apr 24, 1991 · N2409J · Substantial damage
  > The pilot's improper use of carburetor heat. A factor in the accident was the existing of carburetor icing conditions.
- [NTSB FTW91FA070](https://openairdocs.org/ntsb/FTW91FA070.md): Bell 206B · So. Marsh 275 · Accident · 2 fatal · Field investigation · Final report · Apr 23, 1991 · N213AL · Destroyed
  > The inflight structural failure and separation of the vertical fin which led to a loss of control and mast bumping. The failure of the fin was due to inadequate corrosion control efforts by the operator.
- [NTSB CHI91LA138](https://openairdocs.org/ntsb/CHI91LA138.md): Piper PA-22-108 · Millard, NE · Accident · No injuries · Limited investigation · Final report · Apr 23, 1991 · N5421Z · Destroyed
  > Improper use of APU by unknown personnel which resulted in the airplane's electrical wiring melting and subsequent short.
- [NTSB LAX91FA181](https://openairdocs.org/ntsb/LAX91FA181.md): Piper PA-28-181 · Carpenteria, CA · Accident · 4 fatal · Field investigation · Final report · Apr 21, 1991 · N8019N · Destroyed
  > 1) Inadequate weather evaluation by the pilot, 2) poor inflight decision to try and continue VMC flight, and 3) the pilot's lack of total experience.
- [NTSB CHI91FA135](https://openairdocs.org/ntsb/CHI91FA135.md): Piper PA-24-250 · Wadsworth, IL · Accident · Serious injuries · Field investigation · Final report · Apr 21, 1991 · N651OP · Destroyed
  > The pilot in command's failure to select the proper fuel tank and not performing emergency procedures when the engine ceased to run. A factor related to this accident was power transmissions wires located on the pilot's approach path to landing.
- [NTSB SEA91LA092](https://openairdocs.org/ntsb/SEA91LA092.md): Smelser KR-2 · Spokane, WA · Accident · Minor injuries · Limited investigation · Final report · Apr 20, 1991 · N570TS · Substantial damage
  > A failure of the fuel drain valve which resulted in fuel exhaustion and a loss of engine power.
- [NTSB LAX91LA182](https://openairdocs.org/ntsb/LAX91LA182.md): Robinson R22-BETA · Phoenix, AZ · Accident · Serious injuries · Limited investigation · Final report · Apr 20, 1991 · N4066J · Substantial damage
  > The pilot's failure to maintain main rotor RPM. Factor contributing to the accident was the pilot's inadequate in-flight planning.
- [NTSB ATL91LA085](https://openairdocs.org/ntsb/ATL91LA085.md): Piper PA-28R-200 · Bessemer, AL · Accident · No injuries · Limited investigation · Final report · Apr 20, 1991 · N503G · Substantial damage
  > Rupture of a high-time, rubber, oil cooler hose, which resulted in a loss of engine oil, oil exhaustion, and seizure of the engine.
- [NTSB ATL91FA084](https://openairdocs.org/ntsb/ATL91FA084.md): Cessna 172N · Dunlap, TN · Accident · 2 fatal · Field investigation · Final report · Apr 20, 1991 · N5738J · Destroyed
  > The pilot-in-command's inadequate preflight planning/preparation, his attempted VFR flight into IFR conditions, and his subsequent failure to maintain a proper altitude. Factors in the accident were: the mountainous terrain, the foggy, low ceiling conditions…
- [NTSB SEA91LA088](https://openairdocs.org/ntsb/SEA91LA088.md): Luscombe 8A · Clark Fork, ID · Accident · No injuries · Limited investigation · Final report · Apr 19, 1991 · N45656 · Destroyed
  > The pilot-in-command's failure to maintain proper altitude in cruise light resulting in an in flight collision with a wire and subsequent forced landing in a river.
- [NTSB DEN91LA062](https://openairdocs.org/ntsb/DEN91LA062.md): Ercoupe 415-C · Santa Rosa, NM · Accident · Minor injuries · Limited investigation · Final report · Apr 19, 1991 · N87259 · 2 aircraft · Substantial damage
  > The pilot of the other aircraft failed to maintain clearance between the aircraft.
- [NTSB DEN91FA061](https://openairdocs.org/ntsb/DEN91FA061.md): Cessna T210M · Littleton, CO · Accident · Serious injuries · Field investigation · Final report · Apr 19, 1991 · N761CM · Destroyed
  > Improper reassembly of the overhauled turbocharger by maintenance personnel, and the pilot's improper use of the mixture control and boost pump. Factors related to the accident were: the adverse weather conditions and unsuitable terrain in the emergency…
- [NTSB CHI91DEE04](https://openairdocs.org/ntsb/CHI91DEE04.md): Beech 35-A33 · Vernon Hills, IL · Accident · No injuries · Final report · Apr 18, 1991 · N123JB · Substantial damage
  > Water contamination of the fuel, and the pilot's inadequate preflight inspection.
- [NTSB SEA91LA087](https://openairdocs.org/ntsb/SEA91LA087.md): Cessna 172H · Coeur D'Alene, ID · Accident · Serious injuries · Limited investigation · Final report · Apr 16, 1991 · CFBET · Substantial damage
  > The pilot's misjudgement of his aircraft's climb capability when flying towards rising terrain. Factors include his lack of familiarity with the geographic area.
- [NTSB LAX91LA178](https://openairdocs.org/ntsb/LAX91LA178.md): Piper PA22-150 · Las Vegas, NV · Accident · Serious injuries · Limited investigation · Final report · Apr 15, 1991 · N4416A · Substantial damage
  > That the pilot improperly selected the fuel tank that did not contain any fuel and his subsequent failure to maintain airspeed.
- [NTSB NYC91LA113](https://openairdocs.org/ntsb/NYC91LA113.md): Grumman American AA-5A · Pleasant Valley, NY · Accident · Minor injuries · Limited investigation · Final report · Apr 14, 1991 · N9763U · 2 aircraft · Destroyed
  > The failure of the pilot of N5232K to maintain visual contact and separation with N9763U.
- [NTSB LAX91LA176](https://openairdocs.org/ntsb/LAX91LA176.md): Grumman AA-LC · Inyokern, CA · Accident · Serious injuries · Limited investigation · Final report · Apr 14, 1991 · N31DV · Substantial damage
  > Poor flight planning by the pilot-in-command which resulted in a total loss of engine power due to fuel exhaustion.
- [NTSB SEA91LA084](https://openairdocs.org/ntsb/SEA91LA084.md): Cessna C-172N · Ellensburg, WA · Accident · No injuries · Limited investigation · Final report · Apr 13, 1991 · N75646 · Substantial damage
  > The improper maintenance inspection of the airccraft. A factor relating to the accident was a ditch in the ladning area.
- [NTSB NYC91FA112](https://openairdocs.org/ntsb/NYC91FA112.md): Piper PA-30 · Hollidaysburg, PA · Accident · 1 fatal · Field investigation · Final report · Apr 13, 1991 · N8073Y · Destroyed
  > The pilot's loss of control for undetermined reasons.
- [NTSB ATL91LA081](https://openairdocs.org/ntsb/ATL91LA081.md): Cessna 150F · Whiteville, NC · Accident · Serious injuries · Limited investigation · Final report · Apr 13, 1991 · N7919F · Substantial damage
  > Carburetor ice due to the pilot's failure to use carburetor heat.
- [NTSB SEA91LA083](https://openairdocs.org/ntsb/SEA91LA083.md): Aeronca 11AC · Port Orchard, WA · Accident · No injuries · Limited investigation · Final report · Apr 12, 1991 · N85948 · Substantial damage
  > The loss of engine power due to contaminated fuel system.
- [NTSB LAX91LA174](https://openairdocs.org/ntsb/LAX91LA174.md): Cessna 182B · Madera, CA · Accident · No injuries · Limited investigation · Final report · Apr 12, 1991 · N7290E · Substantial damage
  > That the pilot's fuel consumption calculation were inaccurate. Contributing to this accident was fuel exhaustion.
- [NTSB NYC91FA115](https://openairdocs.org/ntsb/NYC91FA115.md): Cessna 172G · New Bedford, MA · Accident · 2 fatal · Field investigation · Final report · Apr 9, 1991 · N6005R · Destroyed
  > The pilot's improper planning/decision and failure to maintain proper altitude after encountering adverse weather at low altitude. The adverse weather (fog) was a related factor.
- [NTSB CHI91FA126](https://openairdocs.org/ntsb/CHI91FA126.md): Beech F.33A · Chippewa Falls, WI · Accident · 2 fatal · Field investigation · Final report · Apr 9, 1991 · N8012T · Destroyed
  > The first pilot's continued flight in known adverse weather. Factors in the accident were the first pilot's poor weather evaluation, the second pilot's complacency and the first pilot's self induced pressure to complete a checkout in model.
- [NTSB ANC91LA051](https://openairdocs.org/ntsb/ANC91LA051.md): Aeronca 11AC · Kahiltna Glac., AK · Accident · Serious injuries · Limited investigation · Final report · Apr 9, 1991 · N3436E · Substantial damage
  > A downdraft and the pilot's inadequate remedial action.
- [NTSB LAX91LA166](https://openairdocs.org/ntsb/LAX91LA166.md): Piper PA-28-140 · Carefree, AZ · Accident · Serious injuries · Limited investigation · Final report · Apr 8, 1991 · N5206T · Destroyed
  > Inadequate supervision by the certified flight instructor (CFI), an inadequate visual lookout by both pilots.
- [NTSB LAX91LA164](https://openairdocs.org/ntsb/LAX91LA164.md): Piper PA 46 · North Hollywood, CA · Accident · Serious injuries · Limited investigation · Final report · Apr 8, 1991 · N9113X · Destroyed
  > The pilot-in-command's poor preflight planning, inadequate fuel consumption calculations which resulted in a loss of engine power due to fuel exhaustion, and the pilot-in-command's failure to follow air traffic control verbal instructions which would have…
- [NTSB NYC91LA110](https://openairdocs.org/ntsb/NYC91LA110.md): Cessna 182F · Carrabassett Vy, ME · Accident · No injuries · Limited investigation · Final report · Apr 7, 1991 · N312OU · Substantial damage
  > Improper use of the carburetor heat by the pilot which resulted in a power loss due to carburetor ice over unsuitable terrain.
- [NTSB LAX91LA161](https://openairdocs.org/ntsb/LAX91LA161.md): Rockwell 112TCA · Burbank, CA · Accident · Minor injuries · Limited investigation · Final report · Apr 7, 1991 · N4632W · Destroyed
  > That the pilot failed to properly preflight the airplane and miscalculated the airplane's fuel consumption. Contributing to this accident was fuel exhaustion.
- [NTSB CHI91LA125](https://openairdocs.org/ntsb/CHI91LA125.md): Cessna 152 · Oskosh, WI · Accident · No injuries · Limited investigation · Final report · Apr 7, 1991 · N24399 · Substantial damage
  > Refueling not performed resulting in loss of engine power due to fuel exhaustion. Factors related to the accident were misjudged fuel consumption calculations and non suitable terrain.
- [NTSB ATL91FA077](https://openairdocs.org/ntsb/ATL91FA077.md): Cessna 172D · Mocksville, NC · Accident · 1 fatal · Field investigation · Final report · Apr 7, 1991 · N2936U · Substantial damage
  > The loss of engine power due to open circuits in the ignition wiring harness, and the pilot's failure to maintain flying airspeed during the forced landing attempt. Factors in this accident were the dark night lighting conditions at the time of the accident.
- [NTSB SEA91LA079](https://openairdocs.org/ntsb/SEA91LA079.md): Grumman American AA-1C · Wenatchee, WA · Accident · No injuries · Limited investigation · Final report · Apr 6, 1991 · N9651U · Destroyed
  > Carburetor ice as a result of the pilot's improper use of carburetor heat.
- [NTSB NYC91LA102](https://openairdocs.org/ntsb/NYC91LA102.md): Schweizer SGS-1-30 · Wurtsboro, NY · Accident · 1 fatal · Limited investigation · Final report · Apr 6, 1991 · N3620D · Destroyed
  > An inflight failure of the left wing spar due to overload from pilot induced control inputs, while recovering from a dive. Factors related to the accident were, the pilot's decision to fly with the trim system disconnected and lack of recent experience in…
- [NTSB LAX91LA157](https://openairdocs.org/ntsb/LAX91LA157.md): Cessna 172N · Stockton, CA · Accident · No injuries · Limited investigation · Final report · Apr 5, 1991 · N733MQ · Substantial damage
  > The installation by maintenance personnel of an incorrect gasket that resulted in the loss of the engine magneto.
- [NTSB LAX91FA159](https://openairdocs.org/ntsb/LAX91FA159.md): Robinson R22B · Temecula, CA · Accident · 1 fatal · Field investigation · Final report · Apr 5, 1991 · N80028 · Destroyed
  > The failure of the pilot to maintain separation from obstacles (power lines).
- [NTSB CHI91DER02](https://openairdocs.org/ntsb/CHI91DER02.md): Paulbicke Bede 5B · Park Rapids, MN · Accident · 1 fatal · Final report · Apr 5, 1991 · N334DF · Destroyed
  > The pilot's failure to maintain adequate airspeed which resulted in an inadvertent stall and subsequent spin.

Next page: https://openairdocs.org/ntsb-phases/400/cases.md?page=266

## 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=265

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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.