NTSB investigations: Lycoming IO-540 series, AZ
27 cases on aircraft whose registry engine model is Lycoming IO-540 series. Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.
Cases per year
| 1980 | 1 |
|---|---|
| 1981 | 1 |
| 1982 | 1 |
| 1984 | 1 |
| 1992 | 2 |
| 1994 | 2 |
| 1995 | 1 |
| 1997 | 1 |
| 2001 | 1 |
| 2003 | 2 |
| 2006 | 2 |
| 2007 | 2 |
| 2009 | 1 |
| 2014 | 2 |
| 2019 | 1 |
| 2021 | 3 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 1 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "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\" = 'AZ' AND c.\"eventCountry\" = 'USA'
AND c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41530', '41585'))
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.
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" = 'AZ' AND c."eventCountry" = 'USA'
AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41530', '41585'))
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 WPR26FA097Accident · 1 fatalClass 3 · FieldPreliminary reportSocata TB21 · Prescott, AZOn February 4, 2026, about 1950 mountain standard time, a Socata TB21, N967WM, was destroyed when it was involved in an accident near Prescott, Arizona. The pilot was fatally injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91…NTSB WPR25LA136Accident · No injuriesClass 3 · LimitedPreliminary reportD'Apuzzo Senior Aero Sport · Phoenix, AZOn April 19, 2025, about 1106 Pacific daylight time, an experimental amateur built D'Apuzzo Senior Aero Sport, N321WC, was substantially damaged when it was involved in an accident near Phoenix, Arizona. The pilot was not injured. The airplane was operated as…NTSB WPR24LA146Accident · Minor injuriesClass 3 · LimitedFinal reportRobert Sterling 4P · Lake Havasu City, AZA loss of engine power during initial climb due to fuel vapor lock. Contributing to the accident was the incorrect installation of the ancillary fuel supply system components.NTSB WPR21LA359Accident · Minor injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 II · Phoenix, AZThe student pilot's failure to maintain helicopter control while making a clearing turn which resulted in a hard landing.NTSB WPR21LA357Accident · Serious injuriesClass 3 · LimitedFinal reportFonville Swearingen SX300 · Buckeye, AZThe total loss of engine power due to the failure of the left magneto.NTSB WPR21LA341Accident · No injuriesClass 4 · LimitedFinal reportRobinson R44 · Camp Verde, AZThe pilot's inadequate preflight performance calculations which resulted in an aborted takeoff and collision with trees.NTSB GAA19CA559Accident · No injuriesData collectionFinal reportPiper PA60 · Sedona, AZThe pilot's exceedance of the airplane's critical angle of attack during landing in gusting crosswind conditions, which resulted in an aerodynamic stall.NTSB WPR14TA278Accident · No injuriesFinal reportRockwell International 500 S · Willcox, AZThe pilot’s failure to compensate for tailwind conditions and maintain directional control during landing, which resulted in a runway excursion.NTSB WPR14FA172Accident · 1 fatalField investigationFinal reportNBB Glasair III · Young, AZThe noninstrument-rated pilot’s decision to enter instrument meteorological conditions, which resulted in the loss of airplane control.NTSB WPR09CA224Accident · No injuriesData collectionFinal reportRobinson R44 · Cottonwood, AZThe pilot's inadequate visual lookout and failure to maintain clearance from wires.NTSB SEA07FA199Accident · 2 fatalField investigationFinal reportCessna 182S · New River, AZThe pilot's inadvertent VFR flight into IMC and his ensuing failure to maintain aircraft control while in cruise flight. Contributing factors were the cloudy weather and the dark night conditions.NTSB LAX07CA091Accident · No injuriesData collectionFinal reportMaule M-7-235B · Prescott, AZThe pilot's inadequate preflight inspection, and his failure to maintain sufficient airspeed to avoid a stall/mush during an aborted takeoff, which resulted in a loss of control, and an in-flight collision with terrain. Factors associated with the accident…NTSB LAX06LA247Accident · Minor injuriesLimited investigationFinal reportRobinson R44 · Flagstaff, AZthe pilot's inadequate preflight planning decision to take off under a low ceiling into an area of mountainous terrain that resulted in an encounter with lowering clouds and forced the pilot to land in unfavorable terrain.NTSB LAX06LA141Accident · 1 fatalLimited investigationFinal reportVelocity XL-RG · Pearce, AZa departure from controlled flight for undetermined reasons, resulting in a collision with terrain.NTSB LAX04CA008Accident · No injuriesData collectionFinal reportVelocity XL · Casa Grande, AZthe pilot's misjudged landing flare and inadequate compensation for crosswind conditions, which resulted in his failure to maintain runway alignment.NTSB LAX03LA123Accident · No injuriesLimited investigationFinal reportRobinson R-44 II · Willcox, AZThe failure of the alternator belt which resulted in the failure of the main drive belt.NTSB LAX01LA266Accident · No injuriesLimited investigationFinal reportMaule M-7-235C · Flagstaff, AZThe pilot's improper recovery from a bounced landing and his failure to maintain directional control, resulting in a ground loop.NTSB LAX97LA158Accident · 2 fatalLimited investigationFinal reportDevendorf Glassair GL25 · Congress, AZfailure of the pilot to recover from an inverted stall/spin prior to impact with the ground. The reason for the loss of control was not determined.NTSB LAX95LA314Accident · 1 fatalLimited investigationFinal reportPiper PA-23-250 · Marana, AZthe pilot's poor installation of the propeller which allowed the propeller to become loose, and the pilot's improper emergency procedure by feathering the wrong propeller.NTSB LAX94LA253Accident · No injuriesLimited investigationFinal reportSchumacher Swearingen SX-300 · Kingman, AZthe pilot's inadvertent raising the flaps during a go-around attempt. A factor in the accident was the gusty crosswind condition.NTSB LAX94LA225Accident · Serious injuriesLimited investigationFinal reportStaudacher 300S · Chandler, AZThe operation of the engine at an RPM setting that exceeded the original design specifications and resulted in the failure of the no. 5 connecting rod bearing.NTSB LAX92LA235Accident · No injuriesLimited investigationFinal reportMcquen Glassair III · Casa Grande, AZFuel starvation due to the pilot's misreading of a newly installed fuel selector panel with placards and a position pointer which were confusing. Factors in the accident were the confusing nature of the fuel panel and placard design and the school bus which…NTSB LAX92LA176Accident · No injuriesLimited investigationFinal reportMcewen Dick Glasair III · Casa Grande, AZA failure of the pilot to select the proper fuel tank and subsequent fuel starvation. Contributing to the accident was an inadequate design by the manufacturer that permitted the fuel selector to be rotated 360 degrees, and the pilot's lack of familiarity…NTSB LAX84LA210Accident · No injuriesLimited investigationFinal reportMaule M6235 · Mesa, AZThe acft dragged a wing and nosed down into the ground collapsing the landing gear and sliding to a stop on a taxi-way during an attempted go-around after an alignment with rwy problem. The CFI said that the student plt used excessive rudder and 'froze' on…NTSB LAX82FA275Accident · 2 fatalField investigationFinal reportPiper PA-601P · South Of Wicken, AZAt about 1005 MST the plt received a wx briefing for a flt to Florida with an overnight stay in Texas. Thunderstorm activity was forecast along the proposed route of flt. The briefer advised the plt to get an updated briefing before departure because of the…NTSB LAX81FA121Accident · 6 fatalClosedPiper PA-32R · Grand Canyon, AZNTSB LAX80FUJ07Accident · Minor injuriesClosedPiper PA-32 · Scottsdale, AZ