NTSB investigations, MA
142 cases where the phase of flight was Takeoff.
Cases per year
| 1964 | 4 |
|---|---|
| 1965 | 5 |
| 1966 | 10 |
| 1967 | 3 |
| 1968 | 4 |
| 1969 | 4 |
| 1970 | 7 |
| 1971 | 4 |
| 1972 | 4 |
| 1973 | 4 |
| 1974 | 3 |
| 1975 | 2 |
| 1976 | 3 |
| 1977 | 5 |
| 1978 | 6 |
| 1979 | 3 |
| 1980 | 3 |
| 1981 | 4 |
| 1982 | 2 |
| 1984 | 3 |
| 1985 | 2 |
| 1986 | 1 |
| 1987 | 1 |
| 1988 | 3 |
| 1989 | 1 |
| 1990 | 1 |
| 1991 | 3 |
| 1992 | 2 |
| 1993 | 4 |
| 1994 | 1 |
| 1995 | 1 |
| 1996 | 1 |
| 1997 | 1 |
| 1998 | 1 |
| 1999 | 1 |
| 2000 | 1 |
| 2001 | 1 |
| 2004 | 1 |
| 2005 | 2 |
| 2006 | 1 |
| 2007 | 3 |
| 2008 | 1 |
| 2009 | 3 |
| 2011 | 1 |
| 2012 | 2 |
| 2013 | 2 |
| 2014 | 2 |
| 2015 | 2 |
| 2017 | 4 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 2 |
| 2022 | 1 |
| 2023 | 1 |
| 2025 | 2 |
| 2026 | 1 |
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\" = 'MA' AND c.\"eventCountry\" = 'USA'
AND c.\"mKey\" IN (SELECT case_mkey FROM case_phases WHERE main = 300)
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" = 'MA' AND c."eventCountry" = 'USA'
AND c."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 300)
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 ERA26LA305Accident · Minor injuriesClass 3 · LimitedPreliminary reportBarry Lynn Kromer Zenith Cruzer · Chatham, MAOn August 14, 2026, about 1040 eastern daylight time, an experimental amateur-built Zenith Cruzer, N673BK, was substantially damaged when it was involved in an accident near Chatham, Massachusetts. The pilot and the pilot-rated passenger received minor…NTSB ERA26FA011Accident · 2 fatalClass 3 · FieldPreliminary reportSocata TBM 700 · Dartmouth, MAOn October 13, 2025, at about 0815 eastern daylight time, a Socata TBM 700C2, N111RF, was substantially damaged when it was involved in an accident near Dartmouth, Massachusetts. The private pilot and the passenger were fatally injured and an automobile…NTSB ERA25LA322Accident · Minor injuriesClass 4 · LimitedFinal reportCessna 182 · Edgartown, MAThe accident was the pilot’s failure to properly configure the airplane for a soft-field takeoff, which resulted in his decision to abort the takeoff and the subsequent runway overrun.NTSB DCA23LA192IncidentClass 4 · LimitedFinal reportLearjet 60 · Boston, MAThe Hop-a-Jet flight crew taking off without a takeoff clearance which resulted in a conflict with a JetBlue flight that had been cleared to land on an intersecting runway.NTSB ERA22LA270Accident · Minor injuriesClass 3 · LimitedFinal reportBurrill Steven E A Plane · Middleboro, MAA total loss of engine power for reasons that could not be determined.NTSB ERA21LA329Accident · No injuriesClass 4 · LimitedFinal reportAlexander Schleicher ASW 27-18 · Sterling, MAThe pilot’s failure to maintain the glider’s stability in the roll axis during the takeoff roll, which resulted in a dragged wingtip and ground loop.NTSB ERA21LA177Accident · No injuriesClass 3 · LimitedFinal reportForisch Edward Bushby Mustang M II · Worcester, MABinding of the left aileron bellcrank push/pull rod, which resulted in an uncommanded right turn.NTSB ERA20LA126Accident · Minor injuriesClass 3 · LimitedFinal reportPiper PA28 · Beverly, MAA loss of engine power due to carburetor icing, and the student pilot’s failure to utilize carburetor heat in conditions conducive to carburetor icing.NTSB GAA19CA195Accident · No injuriesData collectionFinal reportRobinson R44 · Taunton, MAThe pilot's improper decision to land with a gusting left quartering tailwind and his subsequent attempt to reposition the helicopter and take off, which resulted in a dynamic rollover.NTSB ERA18LA023Accident · No injuriesLimited investigationFinal reportGreat Lakes 2T1A · Montague, MAThe pilot’s failure to maintain directional control during the attempted takeoff, which resulted in a runway excursion.NTSB ERA17LA329Accident · Minor injuriesLimited investigationFinal reportCessna 402 · Nantucket, MAThe separation of the pushrod from the elevator trim tab actuator, which rendered controlled flight impossible. Contributing to the separation of the pushrod was the failure of maintenance personnel to properly secure it to the elevator trim tab actuator.NTSB GAA17CA429Accident · No injuriesData collectionFinal reportCirrus Design SR22 · Edgartown, MAThe airplane’s collision with geese during the takeoff roll.NTSB GAA17CA326Accident · No injuriesData collectionFinal reportCessna 150 · Newburyport, MAThe student pilot's decision to attempt to close the cockpit window during takeoff and his subsequent failure to maintain directional control.NTSB GAA15CA253Accident · Minor injuriesData collectionFinal reportAir Creation USA Skypper · Stow, MAThe student pilot's improper directional control inputs during the takeoff roll, resulting in a roll over and collision with terrain.NTSB ERA15LA266Accident · No injuriesLimited investigationFinal reportGrumman American Avn. AA 5 · Southbridge, MAThe pilot’s decision to abort the takeoff with insufficient runway remaining, which resulted in a runway excursion.NTSB ERA14CA352Accident · No injuriesData collectionFinal reportCessna 172M · Chatham, MAThe pilot's failure to maintain directional control during takeoff, resulting in a runway excursion and collision with trees.NTSB ERA14MA271Accident · 7 fatalClass 1 · MajorFinal reportGulfstream Aerospace G IV · Bedford, MAThe flight crewmembers' failure to perform the flight control check before takeoff, their attempt to take off with the gust lock system engaged, and their delayed execution of a rejected takeoff after they became aware that the controls were locked.…NTSB ERA13CA415Accident · No injuriesData collectionFinal reportHawker Beechcraft G36 · Edgartown, MAThe pilot's failure to achieve a proper takeoff profile prior to raising the landing gear resulting in a collision with terrain.NTSB ERA13LA360Accident · Minor injuriesLimited investigationFinal reportQuest Kodiak 100 · Westport, MAA failure to achieve a positive climb rate after takeoff for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any mechanical malfunctions or anomalies that would have precluded normal operation.NTSB ERA12CA377Accident · No injuriesData collectionFinal reportGrumman American Avn. AA-1B · Lawrence, MAThe pilot's delayed decision to abort the takeoff, which resulted in a runway excursion.NTSB ERA12CA220Accident · No injuriesData collectionFinal reportAmerican Champion 8KCAB · Beverly, MAThe pilot's loss of airplane control during takeoff, which resulted in a runway excursion.NTSB ERA12CA118Accident · No injuriesData collectionFinal reportCessna 120 · Montague, MAThe pilot's delay in performing a rejected takeoff after experiencing an intermittent loss of engine power, which resulted in a runway excursion.NTSB ERA09LA358Accident · Minor injuriesLimited investigationFinal reportPiper PA-28-161 · Plymouth, MAThe CFI's inadequate preflight planning and delay to abort the takeoff from the soft takeoff area.NTSB OPS09IA008Incident · No injuriesIncident investigationFinal reportAirbus A320 · Boston, MAThe vehicle operator's failure to follow the designated haul route to the construction site and his failure to adhere to airport driving procedures, which led to missed visual cues and lack of required communication prior to crossing the active runway.…NTSB ERA09CA251Accident · No injuriesData collectionFinal reportTaylorcraft BC12-D · Southbridge, MAThe pilot's inadequate compensation for the gusting wind conditions.NTSB NYC08FA218Accident · 1 fatalField investigationFinal reportDehavilland DHC6 · Hyannis, MAThe pilot's failure to remove the flight control lock prior to takeoff. Contributing to the accident was the Federal Aviation Administration's failure to issue an airworthiness directive making the manufacturer's previously-issued flight control lock service…NTSB MIA08CA045Accident · No injuriesData collectionFinal reportCessna 172P · Northampton, MAThe student pilot's failure to maintain directional control of the airplane during the takeoff roll and inadequate supervision by the CFI.NTSB NYC07CA225Accident · No injuriesData collectionFinal reportPiper J3L-65 · Stow, MAA partial loss of engine power for undetermined reasons.NTSB ATL07CA114Accident · No injuriesData collectionFinal reportWaco Classic YMF-5 · Nantucket, MAThe pilot's failure to maintain control of the airplane during takeoff roll, which resulted in an on ground collision with an airport sign.NTSB NYC06CA065Accident · No injuriesData collectionFinal reportCessna A185F · Pembroke, MAThe pilot's failure to maintain control during the takeoff roll, which resulted in a ground loop and subsequent impact with trees. A factor was the soft runway as reported by the pilot.NTSB NYC06LA039Accident · 1 fatalLimited investigationFinal reportRogers Lancair 360 · Vineyard Haven, MAA loss of engine power for undetermined reasons.NTSB NYC05IA095Incident · No injuriesIncident investigationFinal reportAirbus Industrie A330-301 · Boston, MAThe local east controller's failure to follow FAA Order 7110.65, para 3-9-8 and Boston Tower Order 7110.11, Standard Operating Procedures, which resulted in a runway incursion during takeoff involving two transport category airplanes.NTSB NYC05CA019Accident · No injuriesData collectionFinal reportVigneau RAF 2000 GTX · Chatham, MAThe pilot's failure to maintain aircraft control during a takeoff. A factor related to the accident was the pilot's lack of experience in gyroplanes.NTSB NYC01LA195Accident · Minor injuriesLimited investigationFinal reportFairchild M-62A-3 · Hanson, MAThe pilot's failure to maintain aircraft control during the takeoff.NTSB NYC00LA252Accident · No injuriesLimited investigationFinal reportPiper PA-60-601P · Northampton, MAThe pilot's improper preflight planning which resulted in an attempted takeoff from a taxiway. A factor in the accident was the fog.NTSB NYC99LA204Accident · Minor injuriesLimited investigationFinal reportRobinson R-22 · Mansfield, MAWas the student pilot's failure to maintain lateral control of the helicopter while bringing it to a hover. A factor in the accident was the student pilot's lack of total experience in helicopters.NTSB NYC98LA126Accident · No injuriesLimited investigationFinal reportPiper PA-24-180 · Taunton, MAa delayed decision by the pilot to abort the takeoff, which resulted in an overrun. A factor was false reading from the airspeed indicator.NTSB IAD97LA101Accident · No injuriesLimited investigationFinal reportPiper PA-28R-180 · Edgartown, MAThe pilot's inadequate compensation for wind conditions and his failure to maintain directional control. Related factors were the crosswind, wind gusts and high vegetation.NTSB NYC97LA028Accident · No injuriesLimited investigationFinal reportCessna 152 · Mansfield, MAthe student pilot's failure to maintain directional control during the takeoff roll, which resulted in the airplane veering into a snowbank. The proximity of the snowbank was a related factor.NTSB BFO95LA046Accident · No injuriesLimited investigationFinal reportSchweizer SC2-33A · North Adams, MAthe failure of the tow rope during the initial climb. Related factors are the gusty wind conditions, the low altitude at which the failure occurred, the tailwind during the emergency landing roll, and the CFI's intentional ground loop due to the obstacle…NTSB BFO94LA151Accident · Minor injuriesLimited investigationFinal reportGrumman G-44 · Nantucket, MAThe pilot's failure to maintain aircraft control. A factor in the accident was the rough water.NTSB NYC94LA042Accident · No injuriesLimited investigationFinal reportPiper PA-32-R-301T · Norwood, MAThe pilot's delay in aborting the takeoff which resulted in a overrun of the runway. Factors were a snow covered runway, takeoff speed not attained, brakes not used, and a ditch.NTSB BFO93LA127Accident · No injuriesLimited investigationFinal reportCessna 172P · Edgartown, MAThe pilot failed to maintain directional control during takeoff. Other related factors were: the tailwind, and the gross weight of the airplane being exceeded.NTSB NYC93LA131Accident · Minor injuriesLimited investigationFinal reportPiper PA-32 · Spencer, MAThe pilot's inadequate preflight planning for the high density altitude departure and the delay in aborting the takeoff roll, with insufficient runway remaining, resulting in a collision with treesNTSB NYC93LA061Accident · No injuriesLimited investigationFinal reportCessna 152 · Orange, MAThe pilot failed to maintain control of the airplane resulting in the airplane departing the runway and impacting with a snow bank.NTSB BFO92LA113Accident · No injuriesLimited investigationFinal reportStinson JR.SR. · Hanson, MAThe pilot inadequate compensation for wind which resulted in the loss of directional control.NTSB BFO92LA108Accident · Serious injuriesLimited investigationFinal reportPiper PA-24-250 · Marston Mills, MAThe pilot's inadequate preflight preparation. Contributing was the pilot's failure to use all available runway and overconfidence in his own abilities.NTSB NYC91IA137Incident · No injuriesIncident investigationFinal reportBoeing 727-214 · Boston, MAThe failure of the third stage turbine blade on the number two engine, due to high cycle fatigue.NTSB NYC91LA105Accident · No injuriesLimited investigationFinal reportCessna 170B · Newburyport, MAThe pilot failing to compensate adequately for adverse wind conditions during takeoff.NTSB NYC91LA066Accident · No injuriesLimited investigationFinal reportSchweizer SGS 2-33A · Williamstown, MAThe failure of the pilot to retract the speed brakes during the preflight, which resulted in the tow airplane being unable to attain sufficient altitude prior to releasing the glider, and the subsequent landing of the glider on unsuitable terrain.