NTSB investigations, 1997
261 cases where the phase of flight was Approach.
Cases per year
| 1962 | 14 |
|---|---|
| 1963 | 10 |
| 1964 | 530 |
| 1965 | 502 |
| 1966 | 600 |
| 1967 | 640 |
| 1968 | 597 |
| 1969 | 572 |
| 1970 | 583 |
| 1971 | 550 |
| 1972 | 522 |
| 1973 | 543 |
| 1974 | 541 |
| 1975 | 530 |
| 1976 | 504 |
| 1977 | 586 |
| 1978 | 567 |
| 1979 | 541 |
| 1980 | 508 |
| 1981 | 473 |
| 1982 | 433 |
| 1983 | 445 |
| 1984 | 433 |
| 1985 | 408 |
| 1986 | 382 |
| 1987 | 327 |
| 1988 | 342 |
| 1989 | 324 |
| 1990 | 334 |
| 1991 | 308 |
| 1992 | 291 |
| 1993 | 276 |
| 1994 | 251 |
| 1995 | 301 |
| 1996 | 272 |
| 1997 | 261 |
| 1998 | 238 |
| 1999 | 244 |
| 2000 | 256 |
| 2001 | 230 |
| 2002 | 232 |
| 2003 | 236 |
| 2004 | 216 |
| 2005 | 229 |
| 2006 | 225 |
| 2007 | 258 |
| 2008 | 211 |
| 2009 | 190 |
| 2010 | 176 |
| 2011 | 194 |
| 2012 | 181 |
| 2013 | 189 |
| 2014 | 178 |
| 2015 | 158 |
| 2016 | 160 |
| 2017 | 191 |
| 2018 | 172 |
| 2019 | 163 |
| 2020 | 156 |
| 2021 | 178 |
| 2022 | 204 |
| 2023 | 186 |
| 2024 | 163 |
| 2025 | 186 |
| 2026 | 88 |
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 year(c.\"eventDate\") = 1997
AND c.\"mKey\" IN (SELECT case_mkey FROM case_phases WHERE main = 500)
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 year(c."eventDate") = 1997
AND c."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 500)
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 NYC98LA058Accident · Minor injuriesLimited investigationFinal reportAerospatiale AS-355 · New York, NYthe pilot's misjudgment of distance and speed on final approach with a tailwind, and his failure to perform a go-around in a timely manner. A factor in the accident was the strong tailwind.NTSB FTW98LA083Accident · Serious injuriesLimited investigationFinal reportCessna R172K · Lakeview, ARthe pilot's failure to maintain runway alignment during the approach, and his delayed decision to execute a go-around. A related factor was the sunglare interfering with the pilot's view.NTSB CHI98LA076Accident · Serious injuriesLimited investigationFinal reportBeech 35-33 · Chesterfield, MOthe pilot's failure to position the fuel selector to the proper fuel tank which led to fuel starvation.NTSB NYC98LA051Accident · Minor injuriesLimited investigationFinal reportPiper J-3C-65 · Albany, OHthe pilot's improper in-flight planning/decision and failure to turn off the carburetor heat during the go-around. Related factors were: the pilot's lack of experience in make and model, and the proximity of trees.NTSB CHI98LA072Accident · 1 fatalLimited investigationFinal reportPiper PA-30/A · Hastings, NEThe pilot's improper IFR procedure, by which he failed to maintain minimum descent altitude. Fog, a low ceiling, and night condition were a contributing factor.NTSB ATL98FA030Accident · 2 fatalField investigationFinal reportPiper PA-28-181 · Tallahassee, FLThe pilot's failure to maintain the proper glidepath and adequate obstacle clearance which resulted in collision with a power transmission line.NTSB LAX98LA062Accident · No injuriesLimited investigationFinal reportPiper PA-24-260 · Healdsburg, CAthe pilot's misjudged distance and altitude relationship to the runway during a short field approach, which resulted in an undershoot and a hard landing.NTSB FTW98FA074Accident · 2 fatalField investigationFinal reportBeech A100 · Colo Springs, COFailure of the pilot to follow IFR Procedures and maintain the minimum descent altitude (MDA). A related factor was fog.NTSB NYC98FA047Accident · 1 fatalField investigationFinal reportCady LONG-EZ · West Milford, NJFailure of the pilot to use carburetor heat, which resulted in carburetor ice. Carburetor icing conditions and terrain conditions were contributing factors.NTSB CHI98LA064Accident · No injuriesLimited investigationFinal reportPiper PA-24-250 · Wichita, KSthe pilot-in-command misjudged the fuel supply and selected an empty fuel tank which resulted in fuel exhaustion. A factor associated with the accident was the rough terrain encountered when the airplane touched down short of the runway.NTSB NYC98LA046Accident · No injuriesLimited investigationFinal reportPiper PA-28-161 · Philadelphia, PAThe pilot's failure to maintain proper distance and altitude during approach which resulted in an undershoot and collision with a fence.NTSB ANC98LA012Accident · No injuriesLimited investigationFinal reportCessna 207 · Alakanuk, AKthe pilot's mismanagement of the airplane's fuel which led to the loss of engine power due to fuel starvation.NTSB SEA98FA023Accident · 2 fatalField investigationFinal reportAero Commander 690A · Yakima, WAA loss of aircraft control for undetermined reasons.NTSB CHI98LA061Accident · 1 fatalLimited investigationFinal reportPiper PA-28-140 · Sturtevant, WIThe pilot's misjudgment of altitude/distance and her failure to maintain adequate visual lookout. Also causal was the pilot's failure to maintain adequate obstacle clearance. A contributing factor was the pilot experiencing a visual illusion.NTSB ATL98FA023Accident · 1 fatalField investigationFinal reportBeech A100 · Charlotte, NCThe pilot's continued approach below decision height without reference to the runway environment, and his failure to execute a missed approach.NTSB LAX98LA056Accident · Serious injuriesLimited investigationFinal reportJohnson Bushrod · Corona, CAAn in-flight loss of control resulting from a malfunction in the wing flap operating system. The malfunction produced asymmetrical drag and induced a roll which could not be overcome by the pilot's flight control inputs.NTSB CHI98LA057Accident · No injuriesLimited investigationFinal reportCessna 402A · Milwaukee, WIInadequate preflight planning/preparation, which resulted in fuel exhaustion.NTSB LAX98LA053Accident · Minor injuriesLimited investigationFinal reportMcDonnell Douglas 369HS · Saipan, IndiaThe failure of the maintenance facility to comply with the service bulletins, which resulted in the development of a corrosion pit, subsequent leakage and failure of the acceleration bellows of the fuel control.NTSB SEA98LA019Accident · Serious injuriesLimited investigationFinal reportBlue Denney Kitfox Model 3 · Caldwell, IDThe pilot's failure to maintain adequate airspeed.NTSB LAX98LA049Accident · Minor injuriesLimited investigationFinal reportCessna T210N · Union City, CABlockage of the fuel flow transducer, which resulted in fuel starvation and the loss of engine power. Unsuitable terrain for an emergency landing was a contributing factor.NTSB FTW98LA060Accident · Minor injuriesLimited investigationFinal reportPiper PA-24-250 · Lubbock, TXThe inadequate maintenance of the landing gear assembly by maintenance personnel resulting in a partial gear extension, and the pilot's misjudgment of a proper touchdown point to intentionally shut down the engine resulting in the airplane landing short of…NTSB CHI98LA050Accident · No injuriesLimited investigationFinal reportCessna 402B · Spencer, IAThe pilot failure to comply with the prescribed IFR procedure and his not following his company's operations specifications. Low clouds and fog were are contributing factors.NTSB NYC98FA035Accident · 2 fatalField investigationFinal reportCessna 310R · St Mary'S, PAwas the pilot's descent below the minimum descent altitude and his failure to comply with published procedures.NTSB MIA98LA036Accident · Serious injuriesLimited investigationFinal reportCessna 172G · Hazel Green, ALthe pilot's miscalculating the aircraft's fuel consumption for the flight, resulting in a loss of engine power due to fuel exhaustion. A factor was the lack of suitable terrain for the forced landing.NTSB LAX98LA046Accident · Minor injuriesLimited investigationFinal reportPiper PA-32-300 · Saipan, MaliThe loss of engine power for undetermined reasons that resulted in the pilot ditching the aircraft into the ocean.NTSB LAX98FA045Accident · 1 fatalField investigationFinal reportCessna 152 · El Cajon, CAThe solo student's failure to see and follow the other aircraft on the downwind as he had been instructed. Factors influencing this accident was the failure of the pilots in the other aircraft to see and avoid the aircraft encroaching on his flight path; the…NTSB FTW98LA061Accident · No injuriesLimited investigationFinal reportCessna 172N · Watkins, COloss of engine power for undertermined reason(s).NTSB CHI98LA044Accident · Minor injuriesLimited investigationFinal reportCessna 152 · Woodstock, ILthe pilot's failure to see-and-avoid the powerlines on short final. The location of the powerlines was a related factor.NTSB CHI98LA045Accident · No injuriesLimited investigationFinal reportPiper PA-28 · Lakeville, MNgeese that were encounter on an ILS final approach. Darkness was a related factor.NTSB ATL98LA014Accident · No injuriesLimited investigationFinal reportCessna 182A · Waycross, GAa loss of engine power for undetermined reasons.NTSB LAX98LA041Accident · Minor injuriesLimited investigationFinal reportRans S91 · Phoenix, AZThe pilot's failure to maintain an adequate airspeed margin during the forced landing, which resulted in an inadvertent stall/mush.NTSB ATL98LA013Accident · Minor injuriesLimited investigationFinal reportCessna 182P · Opa Locka, FLthe pilot's continued flight into adverse weather conditions, and failure to maintain clearance above the ground while attempting a VFR approach to an airport with low clouds. The low clouds (ceiling) and condition of light at dusk were related factors.NTSB FTW98LA053Accident · Minor injuriesLimited investigationFinal reportCessna 177RG · Tomball, TXThe total loss of engine power resulting from the loss of oil and resultant seizure of a cylinder due to inadequate maintenance by maintenance personnel. A factor was the lack of suitable terrain for the forced landing and the low ceiling.NTSB LAX98LA040Accident · No injuriesLimited investigationFinal reportAero Commander 200D · San Carlos, CAThe pilot's failure to verify that there was an adequate supply of fuel in the selected fuel tank prior to takeoff.NTSB ATL98FA009Accident · 1 fatalField investigationFinal reportBeech B100 · Madison, MSthe pilot's failure to maintain control of the aircraft due to spatial disorientation. A related factor was: the instrument weather conditions.NTSB LAX98LA035Accident · No injuriesLimited investigationFinal reportBeech C23 · Corona, CAThe loss of engine power for undetermined reasons. A factor was the rough terrain that resulted in a nose over during the landing roll.NTSB FTW98LA047Accident · No injuriesLimited investigationFinal reportReid Capella XS · Leander, TXThe loss of engine power due to an undetermined reason. A factor was the lack of suitable terrain for the forced landing.NTSB MIA98LA024Accident · No injuriesLimited investigationFinal reportDouglas DC-3C · Memphis, TNThe pilot-in-command's improper management of fuel resulting in a total loss of engine power on both engines during an instrument approach due to fuel exhaustion.NTSB MIA98LA019Accident · No injuriesLimited investigationFinal reportCessna 402B · Fort Lauderdale, FLThe pilot's improper management of fuel resulting in a total loss of engine power on both engines due to fuel exhaustion.NTSB MIA98LA023Accident · No injuriesLimited investigationFinal reportLet L-13 · Elkin, NCThe instructor's pilot's misjudgment of altitude and distance, and his inadequate compensation for the wind conditions. Unfavorable winds and a fence were contributing factors.NTSB NYC98LA025Accident · No injuriesLimited investigationFinal reportHughes 269B · Cleveland, OHthe pilot's failure to recover from settling-with-power. Factors relating to the accident were: the pilot's downwind approach and low airspeed.NTSB NYC98FA024Accident · 2 fatalField investigationFinal reportPiper PA-23-150 · Fitchburg, MAThe flight instructor's inadequate in-flight decision and his failure to maintain adequate airspeed which resulted in a loss of control. Contributing was the flight instructor's failure to follow standard practices while simulating and practicing emergency…NTSB LAX98LA027Accident · No injuriesLimited investigationFinal reportPiper PA-32R-300 · Santa Rosa, CALoss of engine power for undetermined reasons.NTSB FTW98LA033Accident · Minor injuriesLimited investigationFinal reportAerospatiale SA316B · Counselor, NMthe pilot inadvertently allowing the helicopter to settle with power.NTSB SEA98LA009Accident · 1 fatalLimited investigationFinal reportPiper PA-28-180 · Midvale, IDThe student pilot's failure to maintain adequate clearance with the pole. A factor contributing to the accident was the pole.NTSB NYC98LA021Accident · Minor injuriesLimited investigationFinal reportMooney M20K · Ocean City, NJThe pilot's failure to maintain sufficient altitude. Factors in the accident were the rain and fog.NTSB LAX98LA020Accident · No injuriesLimited investigationFinal reportCessna 170B · Fernley, NVthe pilot's failure to maintain terrain clearance during a delayed go-around after an improper decision to continue an approach to an unlighted runway without adequate visual references. Ground fog was a factor in this accident.NTSB ATL98LA006Accident · Serious injuriesLimited investigationFinal reportDiamond Aircraft Industries DA20-A1 · West Palm Beach, FLthe pilot's inadvertent use of the wrong runway, and his improper decision to continue the approach behind a large airplane (MD-80), which resulted in a wake turbulence encounter, loss of aircraft control, and collision with terrain.NTSB LAX98LA015Accident · Minor injuriesLimited investigationFinal reportBeech D17S · Chino, CAfuel starvation resulting from the pilot's inadequate in-flight planning and improper fuel management. Contributing factors were the nighttime conditions and the rough/uneven terrain.NTSB ANC98IA004Incident · No injuriesIncident investigationFinal reportCessna 208B · Kasigluk, AKinadequate inspection of the aileron by company maintenance personnel, and the pilot's inadequate preflight inspection of the aileron, which led to the jamming of the left aileron due to loose balance weight retaining screws.