NTSB investigations, MD
121 cases where the phase of flight was Maneuvering.
Cases per year
| 1964 | 3 |
|---|---|
| 1965 | 2 |
| 1966 | 4 |
| 1967 | 2 |
| 1968 | 4 |
| 1969 | 5 |
| 1970 | 5 |
| 1971 | 2 |
| 1972 | 2 |
| 1973 | 1 |
| 1975 | 1 |
| 1976 | 5 |
| 1978 | 3 |
| 1979 | 3 |
| 1980 | 1 |
| 1982 | 1 |
| 1983 | 5 |
| 1984 | 4 |
| 1985 | 2 |
| 1986 | 1 |
| 1987 | 4 |
| 1988 | 4 |
| 1989 | 3 |
| 1990 | 1 |
| 1991 | 1 |
| 1992 | 4 |
| 1993 | 4 |
| 1994 | 3 |
| 1995 | 2 |
| 1996 | 2 |
| 1997 | 4 |
| 1998 | 1 |
| 1999 | 2 |
| 2001 | 3 |
| 2002 | 1 |
| 2003 | 1 |
| 2006 | 4 |
| 2009 | 1 |
| 2010 | 1 |
| 2012 | 1 |
| 2013 | 4 |
| 2014 | 1 |
| 2016 | 1 |
| 2017 | 2 |
| 2019 | 3 |
| 2020 | 2 |
| 2021 | 1 |
| 2022 | 1 |
| 2024 | 3 |
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\" = 'MD' AND c.\"eventCountry\" = 'USA'
AND c.\"mKey\" IN (SELECT case_mkey FROM case_phases WHERE main = 450)
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" = 'MD' AND c."eventCountry" = 'USA'
AND c."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 450)
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 ERA25LA004Accident · Serious injuriesClass 4 · LimitedFinal reportGrumman Acft ENG Cor-Schweizer G-164A · Parsonsburg, MDA total loss of engine power for reasons that were not determined.NTSB ERA24FA305Accident · 1 fatalClass 3 · FieldPreliminary reportCessna 402 · Easton, MDOn July 16, 2024, about 0932 eastern daylight time, a Cessna 402B, N7875E, was substantially damaged when it was involved in an accident near Easton, Maryland. The airline transport pilot was fatally injured. The airplane was operated as a Title 14 Code of…NTSB ERA24LA229Accident · Serious injuriesClass 3 · LimitedFinal reportGreat Lakes 2T-1(Menasco Special) · Salisbury, MDThe pilot’s exceedance of the airplane’s critical angle of attack, resulting in an aerodynamic stall and loss of control.NTSB ERA22LA140Accident · Minor injuriesClass 4 · LimitedFinal reportRobinson Helicopter R22 · Fallston, MDThe student pilot's unstabilized hover, which resulted in ground contact and a dynamic rollover. Contributing to the accident was the flight instructor's inadequate supervision of the student and his delayed remedial action.NTSB ERA21LA289Accident · No injuriesClass 3 · LimitedFinal reportPiper PA-23 · Easton, MDA total loss of left engine power and uncommanded feathering of the left propeller for reasons that could not be determined.NTSB ERA20CA300Accident · No injuriesClass 4 · Data collectionFinal reportCessna 182 · Millington, MDThe pilot’s misidentification of a corn field for the destination airport’s runway, and a subsequent aerodynamic stall at low altitude while attempting to land.NTSB ERA20LA160Accident · No injuriesClass 3 · LimitedFinal reportHughes 369 · Pylesville, MDThe loss of engine power due to fuel starvation as a result of unporting of the fuel tank supply pickup while the helicopter was maneuvered to move a conductor wire. Contributing to the accident was the helicopter’s inappropriate configuration for the type of…NTSB ERA19LA267Accident · No injuriesClass 3 · LimitedFinal reportGrumman G164 · Berlin, MDThe malfunction of the No. 9 pushrod, which resulted in a total loss of engine power.NTSB ANC19LA034Accident · No injuriesClass 3 · LimitedFinal reportCessna 172RG · Ocean City, MDA partial loss of power due to the liberation or failure of the No. 2 cylinder's exhaust valve.NTSB ERA19FA163Accident · 2 fatalClass 2 · FieldFinal reportGuimbal Cabri · Kent Island, MDThe noninstrument-rated pilot's continued visual flight into instrument meteorological conditions, which resulted in an inadvertent descent into the water. Contributing to the accident was the pilot's decision to conduct the flight at a low altitude without…NTSB ERA18LA021Accident · No injuriesClass 2 · LimitedFinal reportSocata TB200 · Annapolis, MDA loss of engine power for undetermined reasons after the disconnection of the propeller governor control due to inadequate securenment during maintenance.NTSB ERA17CA099Accident · No injuriesData collectionFinal reportRobinson Helicopter R22 · Fallston, MDThe student pilot's failure to relinquish the flight controls to the flight instructor, which resulted in a collision with terrain.NTSB ERA16CA160Accident · No injuriesData collectionFinal reportBell 206 · Baltimore, MDThe pilot's inadequate compensation for the wind while hovering out of ground effect, which resulted in a loss of tail rotor effectiveness.NTSB ERA14CA217Accident · Minor injuriesData collectionFinal reportRobinson Helicopter R22 Beta · Frederick, MDThe student pilot's failure to maintain directional control during the hover, and the flight instructors lack of remedial action, resulting in a dynamic rollover and structural damage to the helicopter.NTSB ERA13LA361Accident · No injuriesLimited investigationFinal reportBryant Frederick M Rans S-12 · Vienna, MDThe student pilot’s inadequate control of the airplane, which resulted in an aerodynamic stall and subsequent impact with water.NTSB ERA13LA342Accident · Minor injuriesLimited investigationFinal reportMooney M20J · Leonardtown, MDThe improper installation and inspection of the throttle linkage by maintenance personnel, which resulted in the throttle linkage coming loose and a subsequent partial loss of engine power.NTSB ERA13FA309Accident · 2 fatalField investigationFinal reportNanchang China CJ-6A · Ocean City, MDThe pilot's failure to terminate the intentional aerobatic spin at an altitude adequate to prevent impacting the water. Contributing to the accident was the pilot's loss of situational awareness due to target fixation during the prolonged aerobatic maneuver.NTSB ERA13CA122Accident · Minor injuriesData collectionFinal reportAmirkhanian Shahram Charl Commander · Westminster, MDImpact with power lines due to the pilot’s obscured vision due to the low angle of the sun, which prevented the pilot from seeing the lines.NTSB ERA12FA465Accident · 1 fatalField investigationFinal reportPiper PA-18-150 · Berlin, MDPilot incapacitation of unknown origin, which resulted in the airplane’s loss of control and an inadvertent aerodynamic stall/spin.NTSB ERA11CA087Accident · Minor injuriesData collectionFinal reportSchweizer SGS 1-23D · Aberdeen, MDThe pilot's loss of control during an intentional aerobatic maneuver (spin) resulting in a collision with trees.NTSB ERA09LA200Accident · No injuriesLimited investigationFinal reportCirrus Design SR22 · Gaithersburg, MDThe pilot’s spatial disorientation after the passenger door opened during flight in instrument meteorological conditions. Contributing to the accident was the pilot’s failure to properly secure the door latch.NTSB NYC07FA029Accident · Serious injuriesField investigationFinal reportRobinson R44 II · Baltimore, MDThe pilot's failure to maintain control while landing to a trailer, which resulted in a collision with terrain. A factor in the accident was the narrow trailer.NTSB NYC07LA022Accident · 1 fatalLimited investigationFinal reportMonard RAF 2000 GTX · Ridgely, MDThe pilot's failure to maintain rotor rpm while maneuvering, which resulted in a loss of rotor blade rigidity.NTSB NYC06CA213Accident · No injuriesData collectionFinal reportRobinson R22 Beta · Frederick, MDThe flight instructor's delayed remedial action during a hovering autorotation, which resulted in a hard landing and inadvertent dynamic rollover.NTSB NYC06FA071Accident · 2 fatalField investigationFinal reportCessna 172R · Mitchellville, MDThe pilot's improper inflight planning/decision to attempt a landing in weather conditions below landing minimums, and his failure to maintain airspeed while maneuvering. Factors in the accident were the fog and snow.NTSB NYC04LA006Accident · 1 fatalLimited investigationFinal reportExtra Flugzeugbau EA-300L · Queen Anne, MDThe pilot's performance of aerobatic maneuvers with positive and negative Gs, which resulted in a G induced loss of control, and uncontrolled impact with the ground.NTSB IAD02FA052Accident · 1 fatalField investigationFinal reportAyres S-2R · Swanton, MDThe pilot's failure to maintain visual separation from a set of known, yet unmarked power lines.NTSB IAD01FA089Accident · 2 fatalField investigationFinal reportBell 206B · Baltimore, MDThe pilot's improper decision to maneuver in an environment conducive to a loss of tail rotor effectiveness, and his inadequate recovery from the resultant unanticipated right yaw.NTSB IAD01LA083Accident · No injuriesLimited investigationFinal reportCessna 150L · Lusby, MDThe student pilot's improper use of carburetor heat.NTSB NYC01FA158Accident · 1 fatalField investigationFinal reportMoravan Zlin 526F · Queen Anne, MDThe pilot's failure to maintain airspeed during an aerobatic maneuver, which resulted in an inadvertent inverted spin.NTSB NYC00LA034Accident · Serious injuriesLimited investigationFinal reportBates Kitfox · Westminster, MDThe pilot's failure to maintain aircraft control while maneuvering.NTSB NYC99FA161Accident · 1 fatalField investigationFinal reportPiper J3C-85 · Dawson, MDThe pilot's improper decision to turn toward rising terrain with inadequate terrain clearance. Factors were the density altitude, downdraft, and the pilot's decision to operate at a weight in excess of the maximum allowable gross weight.NTSB IAD98FA049Accident · 2 fatalField investigationFinal reportFairchild Hiller FH-1100 · Stevensville, MDThe pilot's abrupt, low-g maneuver, which resulted in mast bumping and separation of the main rotor system.NTSB IAD97FA112Accident · 3 fatalField investigationFinal reportClassic YMF-5 · Ocean City, MDThe pilot performed an aerobatic maneuver at a low altitude, which resulted in an inadvertent stall/spin.NTSB IAD97LA102Accident · 1 fatalLimited investigationFinal reportLardas Renegade Spirit · Boonsboro, MDThe pilot's failure to maintain control of his homebuilt airplane during a low level maneuver after a loss of engine power due to undetermined reasons. A factor in the accident was the pilot's alcohol impairment.NTSB NYC97GA148Accident · Serious injuriesFinal reportSchweizer 269C · Baltimore, MDA total loss of engine power which was a result of incomplete and improper engine overhaul by company maintenance personnel. A factor in the accident was the unsuitable forced landing area terrain.NTSB IAD97LA086Accident · Minor injuriesLimited investigationFinal reportLuscombe LL-8-A · Annapolis, MDthe pilot's failure to use carburetor heat, which resulted in accumulation of carburetor ice and subsequent loss of engine power. Related factors were: carburetor icing conditions, and trees in the emergency landing area.NTSB IAD96FA136Accident · 2 fatalField investigationFinal reportBellanca 8KCAB · Elkton, MDThe pilot's failure to maintain adequate altitude and control of the airplane while performing aerobatic maneuvers.NTSB IAD96LA116Accident · 1 fatalLimited investigationFinal reportQuicksilver Sprint · Mt Airy, MDThe pilot's improper planning/decision and exceeding the design stress limits of the aircraft, which resulted in overload failure of the wing and subsequent uncontrolled collision with the terrain. Factors related to the accident were: the pilot's failure to…NTSB NYC95TA190Accident · Minor injuriesFinal reportSchweizer 269C · Baltimore, MDThe pilot's failure to maintain adequate terrain clearance which resulted in an inflight collision with the ground.NTSB NYC95LA157Accident · No injuriesLimited investigationFinal reportAviat Pitts S-2B · Queenstown, MDfailure of the fuselage longeron tubes due to fatigue, which resulted in partial separation (distortion) of the fuselage, partial loss of aircraft control, and a partial loss of engine power.NTSB NYC94LA097Accident · Serious injuriesLimited investigationFinal reportBell 47G3 Soloy · Friendsville, MDThe partial failure of the turbine engine for undetermined reasons, during an agriculture maneuver at low altitude, over terrain unsuitable for an autorotation.NTSB BFO94FA082Accident · No injuriesField investigationFinal reportCessna A150L · Leonardtown, MDImproper use of carburetor heat by the pilot, which resulted in loss of engine power due to carburetor ice. A contributing factor was the presence of carburetor icing conditions.NTSB BFO94LA035Accident · No injuriesLimited investigationFinal reportRobinson R-22A · Gaithersburg, MDThe pilot's failure to maintain rotor RPM which led to an in flight loss of control resulting in a collision with the runway and the helicopter rolling over on its side. A factor in this accident was the pilot's lack of total experience flying helicopters.NTSB BFO94FA005Accident · 2 fatalField investigationFinal reportCessna 152 · Walkersville, MDImproper planning/decision by the instructor pilot (CFI) by teaching stalls and slow flight to a pre-solo student on a dark night, and the instructor's failure to maintain (or regain) control of the airplane, due to spatial disorientation. Factor's related to…NTSB BFO93FA169Accident · 2 fatalField investigationFinal reportCessna A150 · Greenbelt, MD1) The pilot's poor judgement in buzzing a residential area, 2) his failure to maintain an airspeed above the aerodynamic stalling speed, which led to a stall/spin, and 3) the inability of the pilot to take remedial action and recover from the stall/spin due…NTSB BFO93FA119Accident · 1 fatalField investigationFinal reportBellanca 8GCBC · Berlin, MDFailure of the pilot to maintain airspeed during pullup from an attempted banner pickup, which resulted in a stall.NTSB BFO93LA045Accident · Serious injuriesLimited investigationFinal reportPitts S-2B · Hillsboro, MDFailure of the pilot to maintain airspeed, while performing aerobatic maneuvers, which resulted in an inadvertent flat spin and an uncontrolled descent into terrain.NTSB BFO92LA092Accident · Minor injuriesLimited investigationFinal reportCessna 152 · Chestertown, MDCarburetor ice, due to the pilot's improper use of carburetor heat. Factors related to the accident were: carburetor icing (weather) conditions, and obstructions (houses and utility pole) in the emergency landing area.NTSB NYC92FA093Accident · 3 fatalField investigationFinal reportCessna 172N · Brookeville, MDImproper inflight planning/decision by the flight instructor (pic/cfi) in the Cessna 172, his misjudgement of distance between the two airplanes, and inadequate visual lookout by both pilots in the Cessna 172.