NTSB investigations, IL
900 cases where the phase of flight was Enroute.
Cases per year
| 1963 | 2 |
|---|---|
| 1964 | 20 |
| 1965 | 21 |
| 1966 | 26 |
| 1967 | 31 |
| 1968 | 20 |
| 1969 | 24 |
| 1970 | 38 |
| 1971 | 28 |
| 1972 | 21 |
| 1973 | 26 |
| 1974 | 27 |
| 1975 | 34 |
| 1976 | 29 |
| 1977 | 23 |
| 1978 | 24 |
| 1979 | 22 |
| 1980 | 17 |
| 1981 | 24 |
| 1982 | 19 |
| 1983 | 22 |
| 1984 | 16 |
| 1985 | 14 |
| 1986 | 11 |
| 1987 | 14 |
| 1988 | 15 |
| 1989 | 14 |
| 1990 | 15 |
| 1991 | 11 |
| 1992 | 17 |
| 1993 | 22 |
| 1994 | 19 |
| 1995 | 13 |
| 1996 | 12 |
| 1997 | 10 |
| 1998 | 10 |
| 1999 | 12 |
| 2000 | 11 |
| 2001 | 11 |
| 2002 | 12 |
| 2003 | 9 |
| 2004 | 8 |
| 2005 | 10 |
| 2006 | 9 |
| 2007 | 12 |
| 2008 | 9 |
| 2009 | 5 |
| 2010 | 6 |
| 2011 | 9 |
| 2012 | 7 |
| 2013 | 2 |
| 2014 | 8 |
| 2015 | 5 |
| 2016 | 10 |
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 5 |
| 2020 | 5 |
| 2021 | 2 |
| 2022 | 5 |
| 2023 | 5 |
| 2025 | 3 |
| 2026 | 4 |
Where
Latest cases
Query with SQL
duckdb -csv -c "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.\"eventStateOrRegion\" = 'IL' AND c.\"eventCountry\" = 'USA'
AND c.\"mKey\" IN (SELECT case_mkey FROM case_phases WHERE main = 400)
ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
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."eventStateOrRegion" = 'IL' AND c."eventCountry" = 'USA'
AND c."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 400)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB CEN26LA283Accident · No injuriesClass 3 · LimitedPreliminary reportVelocity Velocity · Palmyra, ILOn August 10, 2026, about 1248 central daylight time, an experimental Velocity 173 FG Elite II airplane, N6954K, sustained substantial damage when it was involved in an accident near Palmyra, Illinois. The pilot and two passengers sustained no injuries. The…NTSB WPR26FA254Accident · 2 fatalClass 3 · FieldPreliminary reportBeech 95-B55 (T42A) · Waterloo, ILOn July 9, 2026, at about 2248 central daylight time, a Beech 95-B55, N202DK, was destroyed when it was involved in an accident near Waterloo, Illinois. The pilot and pilot rated passenger were fatally injured. The airplane was operated as a Title 14 Code of…NTSB CEN26LA131Accident · No injuriesClass 4 · LimitedFinal reportQuad City Challenger · Van Burensburg, ILPropeller separation due to failure of the propeller attachment bolts.NTSB ERA26FA114Accident · 1 fatalClass 3 · FieldPreliminary reportTailwind W-8 · Poplar Grove, ILOn February 14, 2026, about 1600 central standard time, an experimental, amateur-built Tailwind W-8 airplane, N9424H, was destroyed when it was involved in an accident near Poplar Grove, Illinois. The pilot was fatally injured. The airplane was operated as a…NTSB CEN25LA309Accident · No injuriesClass 3 · LimitedPreliminary reportVans RV4 · Elgin, ILOn August 6, 2025, about 1925 central daylight time, a Vans RV4 airplane, N595BS, was substantially damaged when it was involved in an accident near Elgin, Illinois. The pilot and passenger were not injured. The airplane was operated as a Title 14 Code of…NTSB CEN25LA116Accident · No injuriesClass 3 · LimitedPreliminary reportRobinson Helicopter R44 II · Chicago, ILOn March 10, 2025, about 18:30 central daylight time, a Robinson Helicopter R44 II, N128AF was substantially damaged when it was involved in an accident near Chicago, Illinois. The pilot and both passengers were not injured. The helicopter was operated under…NTSB CEN25LA078Accident · No injuriesClass 4 · LimitedFinal reportZenith Stol CH750 · Byron, ILThe pilot inadvertently moved the ignition key to the off position and broke the key, which resulted in a loss of engine power and subsequent forced landing.NTSB CEN23LA372Accident · No injuriesClass 3 · LimitedFinal reportPietenpol Aircamper · Hanover, ILThe pilot’s exceedance of the airplane’s critical angle of attack, which resulted in an aerodynamic stall during an attempted forced landing at low altitude. Contributing to the accident was the loss of engine power for undetermined reasons.NTSB DCA23LA411Accident · Serious injuriesClass 4 · LimitedFinal reportEmbraer ERJ170 · Eleroy, ILAn encounter with clear air turbulence.NTSB CEN23FA359Accident · 1 fatalClass 3 · FieldFinal reportVans RV14 · Virden, ILThe pilot/builder’s improper configuration of the canopy latch micro switch, which incorrectly signaled a closed canopy before flight that resulted in an inflight opening of the airplane’s canopy, an upset of the airplane, and a loss of control from which the…NTSB DCA23LA305Accident · Serious injuriesClass 4 · LimitedFinal reportBoeing 737-924ER · Chicago, ILAn encounter with convectively-induced turbulence (CIT).NTSB CEN23LA106Accident · No injuriesClass 3 · LimitedFinal reportJabiru USA Sport J250-SP · Cortland, ILA total loss of engine power for reasons that could not be determined.NTSB CEN22FA383Accident · 2 fatalClass 3 · FieldFinal reportMooney M20K · Hanna City, ILA total loss of engine power due to fuel exhaustion.NTSB CEN22LA377Accident · No injuriesClass 3 · LimitedFinal reportPiper PA-28-140 · Vernon Hills, ILThe pilot’s improper in-flight fuel management, which led to a loss of engine power due to fuel starvation. Contributing to the accident was the collapsed carburetor heat induction tube that restricted airflow to the engine preventing engine restart.NTSB DCA22FA157Accident · 1 fatalClass 3 · FieldFinal reportBeech A35 · Centralia, ILThe pilot’s unsuccessful attempt to switch fuel tanks, which resulted in fuel starvation. Contributing to the accident was the uninstalled fuel selector handle warning device.NTSB CEN22LA135Accident · Minor injuriesClass 3 · LimitedFinal reportPiper PA-28-235 · Monee, ILThe loss of engine power due to fuel starvation for undetermined reasons during a departure climb that resulted in a forced landing and impact with terrain.NTSB CEN22LA128Accident · No injuriesClass 3 · LimitedFinal reportRyan L17 · Livingston, ILA total loss of engine power due to fuel injection system contamination from an unknown source.NTSB DCA21LA209Accident · Serious injuriesClass 4 · LimitedFinal reportAirbus 319-132 · Chicago, ILAn encounter with clear air turbulence.NTSB CEN21LA221Accident · No injuriesClass 3 · LimitedFinal reportBeech A36 · Pinckneyville, ILThe total loss of engine power due to oil starvation. The reason for the oil starvation could not be determined based on available evidence.NTSB CEN20LA403Accident · No injuriesClass 3 · LimitedFinal reportCessna 177RG · Palatine, ILThe loss of partial engine power due to fuel starvation during departure which resulted in a forced landing and collision with a utility pole.NTSB CEN20LA342Accident · Minor injuriesClass 3 · LimitedFinal reportSiebel Auriga · Rockford, ILThe total loss of engine power for reasons that could not be determined based on available information.NTSB DCA20CA122Accident · Serious injuriesClass 4 · Data collectionFinal reportEmbraer ERJ170 · Plainfield, ILan encounter with convective turbulence.NTSB CEN20CA236Accident · No injuriesClass 4 · Data collectionFinal reportBellanca 1730A · Martinton, ILThe pilot's improper decision to conduct an off-field precautionary landing.NTSB CEN20CA181Accident · Serious injuriesClass 4 · Data collectionFinal reportCessna 172 · Colchester, ILThe pilot's inadequate preflight of the fuel quantity which resulted in a loss of engine power due to fuel starvation during cruise flight.NTSB CEN19LA216Accident · Minor injuriesClass 3 · LimitedFinal reportRutan Varieze · Kaneville, ILThe pilot's failure to use carburetor heat while operating at low power settings in conditions conducive to the development of carburetor ice, and the subsequent total loss of engine power due to carburetor icing.NTSB CEN19FA210Accident · 1 fatalClass 2 · FieldFinal reportBeech A36 · Chebanse, ILA total loss of engine power due to fuel starvation.NTSB CEN19LA152Accident · Minor injuriesClass 3 · LimitedFinal reportRand Robinson KR2 · Poplar Grove, ILThe loss of engine power due to vapor lock of the throttle body injection system.NTSB CEN19LA126Accident · No injuriesClass 3 · LimitedFinal reportPiper PA28 · Dwight, ILA partial loss of engine power due to a restriction in fuel flow for undetermined reasons.NTSB CEN19LA098Accident · Serious injuriesClass 3 · LimitedFinal reportPiper PA32R · Waterloo, ILThe loss of engine power due to a connecting rod failure for reasons that could not be determined due to secondary mechanical damage, which resulted in a subsequent forced landing.NTSB GAA18CA421Accident · No injuriesData collectionFinal reportCessna 182 · Lincoln, ILThe pilot’s improper preflight planning, which resulted in fuel exhaustion and a subsequent total loss of engine power.NTSB CEN18FA259Accident · Serious injuriesField investigationFinal reportEurocopter Deutschland EC135 P1 · Chicago, ILThe pilot's inadvertent disabling of the No. 1 and No. 2 engines' electronic engine control systems, which resulted in engine and rotor overspeed conditions, a subsequent autorotation, and a hard landing. Contributing to the accident were the pilot's…NTSB CEN18LA181Accident · Minor injuriesClass 3 · LimitedFinal reportVans RV7A · Hanover Park, ILA partial loss of engine power shortly after takeoff due to water contamination of the fuel system.NTSB CEN17LA338Accident · No injuriesLimited investigationFinal reportGolden Eagle Chief · Mt. Zion, ILA total loss of engine power for reasons that could not be determined based on the available information.NTSB CEN17LA333Accident · Serious injuriesLimited investigationFinal reportGulfstream American AA 5B · Carbondale, ILThe failure of the propeller due to fatigue as a result of improper installation by unknown maintenance personnel at some point during the life of the propeller.NTSB CEN17FA064Accident · 4 fatalField investigationFinal reportPiper PA 28R-200 · Vienna, ILThe non-instrument rated pilot's decision to descend through an overcast layer of weather during dark night conditions, which resulted in the airplane impacting trees.NTSB CEN17FA053Accident · 1 fatalField investigationFinal reportAircraft Mfg & Design CH601XL Slsa · Marengo, ILA loss of control in flight for reasons that could not be determined because no anomalies consistent with a preimpact failure or malfunction were identified during the investigation.NTSB ENG17IA006Incident · No injuriesIncident investigationFinal reportBombardier CL 600 2C10 · Kansas, ILThe probable cause of the uncontained No. 1 (left) engine failure was a separated high pressure turbine 2nd stage blade that failed due to a fatigue crack that originated below the blade platform from an area of corrosion.NTSB CEN16LA387Accident · Minor injuriesLimited investigationFinal reportPahnke Vernon A Vans RV 9A · Newark, ILThe pilot's failure to properly assemble the fuel pump, which resulted in the loss of fuel pressure and the subsequent partial loss of engine power.NTSB CEN16LA335Accident · Serious injuriesLimited investigationFinal reportCessna U206G · Cave-In-Rock, ILA total loss of engine power due to air entering the fuel system for reasons that could not be determined based on available information. Contributing to the accident was the pilot’s inability to restart the engine due to the check valve assembly design.NTSB CEN16LA297Accident · No injuriesLimited investigationFinal reportCessna 172F · Newark, ILThe failure of the No. 4 cylinder exhaust valve, which resulted in a partial loss of engine power and a forced landing. Contributing to the valve failure and loss of engine power was the extended time since the last overhaul.NTSB CEN16FA276Accident · 1 fatalField investigationFinal reportPiper PA 30 · Plainfield, ILThe pilot's failure to maintain airplane control during an en route climb near convective activity, which resulted in an aerodynamic stall, an uncontrolled descent, and a subsequent in-flight breakup due to an exceedance of the airplane's design load…NTSB CEN16LA218Accident · No injuriesLimited investigationFinal reportAeronca 7AC · East St. Louis, ILA total loss of engine power due to fracture of the piston pin, which led to fatigue cracking and eventual fracture of the adjacent connecting rod.NTSB GAA16CA277Accident · Minor injuriesData collectionFinal reportPiper PA 24 · Loda, ILThe pilot's failure to properly calculate the fuel consumption rate and to properly monitor the fuel status in flight, which resulted in a total loss of engine power due to fuel exhaustion and a subsequent forced landing, runway excursion, and impact with a…NTSB CEN16LA166Accident · Minor injuriesLimited investigationFinal reportCessna 172 · Brimfield, ILA loss of engine power for reasons that could not be determined, as postaccident examination of the engine did not reveal any anomalies that would have precluded normal operation.NTSB CEN15IA385Incident · No injuriesIncident investigationFinal reportPiper PA-23-250 · Joliet, ILA bird strike.NTSB CEN15FA347Accident · 2 fatalField investigationFinal reportGrumman American Avn. AA 5A · Harrisburg, ILThe student pilot's improper decision to conduct a flight in dark, night conditions and his subsequent controlled flight into terrain.NTSB CEN15LA341Accident · Serious injuriesLimited investigationFinal reportHughes 269B · Atkinson, ILThe pilot's improper decision to intentionally fly the helicopter at a low altitude and his subsequent failure to maintain clearance from a power line.NTSB CEN15FA289Accident · 1 fatalField investigationFinal reportCessna 172P · Bartlett, ILThe pilot’s loss of airplane control for reasons that could not be determined because an examination of the airplane did not reveal any preimpact abnormalities.NTSB CEN15LA198Accident · No injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Dunlap, ILA loss of main rotor rpm for reasons that could not be determined during postaccident examinations.NTSB CEN15LA028Accident · 1 fatalLimited investigationFinal reportHuebbe Sonex HB · Plainview, ILThe loss of engine power during cruise flight due to a fatigue fracture of the crankshaft, which resulted in a forced landing on unsuitable terrain.