NTSB investigations
18,849 cases where the phase of flight was Maneuvering.
Cases, newest first
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.\"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."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 ERA17CA187Accident · No injuriesData collectionFinal reportRobinson R22 · Linden, NJThe flight instructor's failure to maintain helicopter control while hovering, which resulted in skid contact with the ground and a dynamic roll-over.NTSB CEN17WA215Accident · No injuriesForeign investigationAyres S2R · Candillargues, France, FranceOn May 16, 2017, about 0530 hours universal coordinated time, an Ayres S2R airplane, French registration F-GIEN, was substantially damaged during a forced landing following a loss of engine power near Candillargues, France. The pilot was not injured. The…NTSB GAA17CA285Accident · Minor injuriesData collectionFinal reportAir Tractor AT 802 · Dumas, TXThe pilot’s failure to maintain lateral control while maneuvering at a low altitude.NTSB CEN17WA221Accident · Serious injuriesForeign investigationSilence Twister · Abingdon, United KingdomOn May 14, 2017, at 1330 universal coordinated time (UTC), a Silence model Twister single-engine airplane, United Kingdom registration G-JINX, serial number LAA 329-15102, was substantially damaged during a forced landing following a loss of engine power…NTSB ERA17FA180Accident · 2 fatalField investigationFinal reportBeech A36TC · Hopkinsville, KYThe noninstrument-rated pilot's intentional visual flight rules flight into instrument meteorological conditions, which resulted in a loss of airplane control due to spatial disorientation. Contributing to the accident were the pilot's overreliance on his…NTSB WPR17FA101Accident · 2 fatalField investigationFinal reportIcon A5 · Lake Berryessa, CAThe pilot's failure to maintain clearance from terrain while maneuvering at a low altitude. Contributing to the accident was the pilot's mistaken entry into a canyon surrounded by steep rising terrain while at a low altitude for reasons that could not be…NTSB CEN17LA179Accident · Minor injuriesLimited investigationFinal reportBeech 19 · Weatherford, TXThe flight instructor’s inadequate in-flight fuel management, which resulted in fuel starvation and a total loss of engine power.NTSB GAA17CA265Accident · No injuriesData collectionFinal reportRotorcraft Development OH-58A+ · Waterloo, ILThe pilot’s failure to see and avoid transmission wires while maneuvering at a low altitude.NTSB CEN17LA176Accident · No injuriesLimited investigationFinal reportThrush S2R-H80 · Gypsum, KSA total loss of engine power during a low-altitude agricultural application flight for reasons that could not be determined during detailed examinations. Contributing to the accident was the pilot’s failure to follow the airplane manufacturer's emergency…NTSB ERA17TA170Accident · Serious injuriesFinal reportBell 206 · Orange Springs, FLThe pilot's failure to maintain adequate clearance between the helicopter's skid and the firefighting bucket and suspension cable, which resulted in the cable becoming entangled on the landing skid and a subsequent loss of helicopter control.NTSB CEN17WA172Accident · 2 fatalForeign investigationPiper PA31 · Schefferville, CanadaOn April 30, 2017, a Piper PA-31 airplane, C-FQQB, impacted terrain near Schefferville, Quebec. The two pilots were fatality injured. The accident investigation is under the jurisdiction and control of the Canadian government. This report is for information…NTSB CEN17FA169Accident · 2 fatalField investigationFinal reportChampion 7KCAB · Collinston, LAThe failure of the flight instructor and the commercial pilot to maintain adequate clearance from a power line during an aerial application training flight.NTSB GAA17CA249Accident · No injuriesData collectionFinal reportCessna 177 · Marathon, NYThe pilot’s failure to maintain altitude and airspeed while maneuvering at a low altitude.NTSB ERA17LA168Accident · Minor injuriesLimited investigationFinal reportRobinson R44 · Newton, NCThe pilot's failure to maintain an adequate airspeed during out-of-ground-effect maneuvering at a low airspeed with a tailwind, which resulted in a loss of helicopter control due to a loss of tail rotor effectiveness.NTSB ERA17FA164Accident · 1 fatalField investigationFinal reportBell-Carson 47G Super C 4 · Timmonsville, SCThe pilot's decision to maneuver the helicopter at a low altitude near trees, which resulted in collision with the trees.NTSB CEN17LA165Accident · No injuriesLimited investigationFinal reportAir Tractor AT 602 · Vidrine, LAThe total loss of engine power for reasons that could not be determined because an examination of the engine and a test run did not reveal any mechanical malfunctions or failures that would have precluded normal operation.NTSB CEN17LA163Accident · No injuriesLimited investigationFinal reportGrumman Schweizer G-164 · Palmer, KSA crack in the cylinder of the radial engine, which resulted in a loss of engine power and a forced landing on unsuitable terrain.NTSB CEN17WA161Accident · 1 fatalForeign investigationChampion 8KCAB · Cancun, MexicoThe accident investigation is under the jurisdiction and control of the Mexican government. This report is for informational purposes only and contains only information released by or obtained from the Mexican government. Further information pertaining to…NTSB GAA17CA225Accident · No injuriesData collectionFinal reportWeatherly 620B · Lewistown, MTThe pilot’s failure to maintain altitude during low-altitude maneuvers in flat light conditions.NTSB CEN17LA151Accident · No injuriesLimited investigationFinal reportGrumman Acft ENG Cor-Schweizer G 164A · Nome, TXAn in-flight fire for reasons that could not be determined based on available information.NTSB WPR17FA085Accident · 4 fatalField investigationFinal reportPiper PA 46-310P · Harrisburg, ORAn encounter with a downburst during an instrument approach, which resulted in a loss of control at low altitude. Contributing to the accident was the air traffic controller's failure to solicit and disseminate pilot reports from arriving and departing…NTSB CEN17FA147Accident · 2 fatalField investigationFinal reportPiper PA-28-180 · Oxford, IAThe failure of the pilot receiving instruction to recover from the practice stall before the airplane entered a spin and the flight instructor's inadequate monitoring of the pilot receiving instruction and delayed remedial action to recover the airplane.NTSB WPR17LA092Accident · No injuriesLimited investigationFinal reportPiper PA 28-140 · Whittier, CAThe pilot's impaired decision-making due to alcohol intoxication and his improper fuel management, which resulted in a total loss of engine power due to fuel starvation.NTSB WPR17LA084Accident · Serious injuriesLimited investigationFinal reportCirrus Design SR22 · Brinnon, WAThe flight instructor's decision to fly into a valley without ensuring adequate clearance to avoid the rising terrain.NTSB ERA17FA144Accident · 1 fatalField investigationFinal reportBuckeye Dream Machine · Knoxville, TNThe pilot's decision to maneuver the aircraft at low altitude, towards rising terrain, which resulted in an inflight collision with trees.NTSB ERA17FA143Accident · 2 fatalField investigationFinal reportCessna 170B · Edgewater, FLThe Cessna pilot's failure to maintain clearance from the Grumman during the transition to a different formation. Contributing to the accident was the stepped down configuration of the formation flight which was composed of dissimilar aircraft.NTSB ERA17WA146Accident · 1 fatalForeign investigationGrumman G164 · Pista La Julia, EcuadorOn March 30, 2017, about 1645 universal coordinated time, a Grumman 164A, Ecuadorian registration HC-BPI, was destroyed when it impacted electrical wires and terrain near Pista La Julia, Ecuador. The foreign certificated pilot was fatally injured. The flight…NTSB WPR17WA083Accident · 1 fatalForeign investigationRobinson R22 · Reefton, New ZealandOn March 27, 2017, about 0345 Universal Time, a Robinson R22, New Zealand registration ZK-IHA, impacted forested terrain about 5.5 miles north of Reefton, West Coast. The pilot, the sole occupant was fatally injured, and the helicopter was substantially…NTSB GAA17CA202Accident · Minor injuriesData collectionFinal reportCessna 182 · Mackay, IDThe pilot's decision to maneuver the airplane over mountainous terrain in high-density altitude conditions, which resulted in the airplane’s inability to maintain altitude or establish a climb.NTSB ERA17FA136Accident · 4 fatalField investigationFinal reportCessna T210 · Hayden, ALThe pilot's decision to continue the flight into known adverse weather conditions, which resulted in spatial disorientation and a subsequent loss of airplane control and in-flight breakup.NTSB ERA17FA135Accident · 1 fatalField investigationFinal reportCessna 500 · Marietta, GAThe pilot's failure to maintain adequate airspeed while manually flying the airplane, which resulted in the airplane exceeding its critical angle of attack and experiencing an aerodynamic stall. Contributing to the accident was the pilot's inability control…NTSB ERA17FA131Accident · 1 fatalField investigationFinal reportAir Tractor AT 602 · Minter City, MSThe pilot's incapacitation for reasons that could not be determined, which resulted in collision with trees and terrain.NTSB CEN17FA127Accident · 1 fatalField investigationFinal reportMcdonnell Douglas Heli 369FF · Chalmers, INThe pilot's failure to ensure that the needle did not entangle with the tower's vertical lattice as he moved the helicopter rearward, which resulted in the helicopter becoming tethered to the tower and a subsequent loss of control.NTSB CEN17WA129Accident · 5 fatalForeign investigationMD Helicopter 369 · Mexicali, MexicoOn March 13, 2017, about 1600 hours pacific daylight time, a MD Helicopters model 369FF single-engine helicopter, serial number 0079FF, Mexican registration XC-PEP, collided with high-voltage power lines while maneuvering near Mexicali, Mexico. The pilot and…NTSB CEN17WA128Accident · 1 fatalForeign investigationPiper PA25 · Etchoropo, Sonora, MexicoOn March 12, 2017, at 2050 hours universal coordinated time, a Piper PA25-235 airplane, Mexican registration XB-FHP, impacted terrain near Etchoropo, Sonora, Mexico. The pilot was fatally injured. The airplane was destroyed by impact forces.The accident…NTSB ERA17LA120Accident · Minor injuriesClass 3 · LimitedFinal reportCessna 150J · Argyle, NYA total loss of engine power for undetermined reasons, which resulted in a forced landing and subsequent impact with trees.NTSB ERA17WA124Accident · 1 fatalForeign investigationPiper PA25 · Villa Tapia, Dominican RepublicOn March 4, 2017, about 1330 coordinated universal time, a Piper PA-25-235, N8969L, was destroyed following a collision with antenna wires and terrain during an aerial application flight near Villa Tapia, Dominican Republic. The pilot was fatally injured. The…NTSB ERA17FA119Accident · 2 fatalField investigationFinal reportBeech B 60 · Duette, FLThe pilots' decision to perform flight training maneuvers at low airspeed at an altitude that was insufficient for stall recovery. Contributing to the accident was the flight instructor's inappropriate use of non-standard stall recovery techniques.NTSB CEN17CA120Accident · Serious injuriesData collectionFinal reportAero Commander S2R · Fairmont, OKThe pilot’s failure to maintain clearance from a power line while conducting agricultural spray operations.NTSB WPR17LA071Accident · No injuriesLimited investigationFinal reportBell 206B · Firebaugh, CAA total loss of engine power due to fuel exhaustion. Contributing to the accident was the improper calibration of the fuel quantity gauge, which led the pilot to believe that there was adequate fuel onboard.NTSB CEN17FA111Accident · 2 fatalField investigationFinal reportCessna 172S · Berthoud, COThe failure of the pilots to apply prompt and/or correct flight control inputs to adequately recover from the intentional aerodynamic spin.NTSB WPR17WA073Accident · No injuriesForeign investigationCessna 152 · Hong Kong, ChinaOn February 26, 2017, about 0314 Coordinated Universal Time, a Cessna 152, B-HHN, collided with trees and came to rest in the trees while attempting a forced landing as a result of a reported loss of engine power. The airplane was operated by Hong Kong…NTSB ERA17WA349Accident · 1 fatalForeign investigationPiper PA25 · Santa Catarina, BrazilOn February 23, 2017, about 1030 coordinated universal time, an Piper PA-25-235, Brazilian registration PT-WBO, was substantially damaged when it impacted terrain during an aerial application flight near Santa Catarina, Brazil. The foreign certificated pilot…NTSB WPR17WA069Accident · Serious injuriesForeign investigationHughes 369E · Raetihi, New ZealandOn February 19, 2017, at 0930 local time, a McDonnell Douglas Hughes 369E, ZK-HRK, operated by Precision Helicopters Ltd. collided with a ridgeline in the Waimarino Forest near Raetihi, New Zealand during an external load operation. The helicopter was being…NTSB ERA17LA110Accident · Serious injuriesLimited investigationFinal reportPiper PA28R · Bayonne, NJMaintenance personnel’s incorrect installation of the No. 3 cylinder’s hydraulic valve tappet plunger, which resulted in a failure of the No. 3 cylinder’s intake valve and the subsequent partial loss of engine power.NTSB WPR17LA068Accident · No injuriesLimited investigationFinal reportRobinson Helicopter R22 Beta · Holbrook, AZThe pilot’s failure to compensate for a loss of effective translational lift while turning from an upwind to a downwind condition at a low altitude and low airspeed, which resulted in a loss of helicopter control.NTSB ERA17FA107Accident · 1 fatalField investigationFinal reportBeech A45 · Climax, GAThe failure of maintenance personnel to ensure that the throttle and fuel metering unit AN "B" nut was secured, which resulted in a total loss of engine power in flight and a subsequent collision with trees while attempting to land after sunset.NTSB GAA17CA151Accident · No injuriesData collectionFinal reportRobinson Helicopter R44 · Holtville, CAThe pilot’s initiation of a left turn at a low altitude with low airspeed and a tailwind while operating near maximum gross weight, which resulted in the helicopter losing altitude, touching down on a dirt surface, and a subsequent dynamic rollover.NTSB WPR17FA063Accident · 1 fatalField investigationFinal reportCessna 172 · Ramona, CAThe flight instructor's failure to ensure that adequate clearance from terrain was maintained after performance of a simulated engine failure maneuver, which resulted in controlled flight into terrain.NTSB ANC17LA016Accident · Serious injuriesLimited investigationFinal reportPiper PA18 · Sterling, AKThe pilot’s loss of control while maneuvering for reasons that could not be determined based on the available information.