# NTSB investigations: Lycoming IO-540 series, AZ

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB WPR26FA097](https://openairdocs.org/ntsb/WPR26FA097.md): Socata TB21 · Prescott, AZ · Accident · 1 fatal · Class 3 · Field · Preliminary report · Feb 5, 2026 · N967WM · Destroyed
  > On 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 WPR25LA136](https://openairdocs.org/ntsb/WPR25LA136.md): D'Apuzzo Senior Aero Sport · Phoenix, AZ · Accident · No injuries · Class 3 · Limited · Preliminary report · Apr 19, 2025 · N321WC · Substantial damage
  > On 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 WPR24LA146](https://openairdocs.org/ntsb/WPR24LA146.md): Robert Sterling 4P · Lake Havasu City, AZ · Accident · Minor injuries · Class 3 · Limited · Final report · May 9, 2024 · N78GP · Substantial damage
  > A 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 WPR21LA359](https://openairdocs.org/ntsb/WPR21LA359.md): Robinson Helicopter R44 II · Phoenix, AZ · Accident · Minor injuries · Class 4 · Limited · Final report · Sep 30, 2021 · N74706 · Substantial damage
  > The student pilot's failure to maintain helicopter control while making a clearing turn which resulted in a hard landing.
- [NTSB WPR21LA357](https://openairdocs.org/ntsb/WPR21LA357.md): Fonville Swearingen SX300 · Buckeye, AZ · Accident · Serious injuries · Class 3 · Limited · Final report · Sep 18, 2021 · N5SX · Substantial damage
  > The total loss of engine power due to the failure of the left magneto.
- [NTSB WPR21LA341](https://openairdocs.org/ntsb/WPR21LA341.md): Robinson R44 · Camp Verde, AZ · Accident · No injuries · Class 4 · Limited · Final report · Aug 28, 2021 · N544SH · Substantial damage
  > The pilot's inadequate preflight performance calculations which resulted in an aborted takeoff and collision with trees.
- [NTSB GAA19CA559](https://openairdocs.org/ntsb/GAA19CA559.md): Piper PA60 · Sedona, AZ · Accident · No injuries · Data collection · Final report · Sep 20, 2019 · N700NJ · Substantial damage
  > The pilot's exceedance of the airplane's critical angle of attack during landing in gusting crosswind conditions, which resulted in an aerodynamic stall.
- [NTSB WPR14TA278](https://openairdocs.org/ntsb/WPR14TA278.md): Rockwell International 500 S · Willcox, AZ · Accident · No injuries · Final report · Jul 3, 2014 · N101AA · Substantial damage
  > The pilot’s failure to compensate for tailwind conditions and maintain directional control during landing, which resulted in a runway excursion.
- [NTSB WPR14FA172](https://openairdocs.org/ntsb/WPR14FA172.md): NBB Glasair III · Young, AZ · Accident · 1 fatal · Field investigation · Final report · Apr 26, 2014 · N911EX · Destroyed
  > The noninstrument-rated pilot’s decision to enter instrument meteorological conditions, which resulted in the loss of airplane control.
- [NTSB WPR09CA224](https://openairdocs.org/ntsb/WPR09CA224.md): Robinson R44 · Cottonwood, AZ · Accident · No injuries · Data collection · Final report · May 3, 2009 · N441CB · Substantial damage
  > The pilot's inadequate visual lookout and failure to maintain clearance from wires.
- [NTSB SEA07FA199](https://openairdocs.org/ntsb/SEA07FA199.md): Cessna 182S · New River, AZ · Accident · 2 fatal · Field investigation · Final report · Jul 15, 2007 · N2454M · Substantial damage
  > The 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 LAX07CA091](https://openairdocs.org/ntsb/LAX07CA091.md): Maule M-7-235B · Prescott, AZ · Accident · No injuries · Data collection · Final report · Feb 20, 2007 · N39KB · Substantial damage
  > The 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 LAX06LA247](https://openairdocs.org/ntsb/LAX06LA247.md): Robinson R44 · Flagstaff, AZ · Accident · Minor injuries · Limited investigation · Final report · Jul 28, 2006 · N74780 · Substantial damage
  > the 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 LAX06LA141](https://openairdocs.org/ntsb/LAX06LA141.md): Velocity XL-RG · Pearce, AZ · Accident · 1 fatal · Limited investigation · Final report · Apr 12, 2006 · N732RA · Destroyed
  > a departure from controlled flight for undetermined reasons, resulting in a collision with terrain.
- [NTSB LAX04CA008](https://openairdocs.org/ntsb/LAX04CA008.md): Velocity XL · Casa Grande, AZ · Accident · No injuries · Data collection · Final report · Oct 9, 2003 · N658SE · Substantial damage
  > the pilot's misjudged landing flare and inadequate compensation for crosswind conditions, which resulted in his failure to maintain runway alignment.
- [NTSB LAX03LA123](https://openairdocs.org/ntsb/LAX03LA123.md): Robinson R-44 II · Willcox, AZ · Accident · No injuries · Limited investigation · Final report · Apr 2, 2003 · N233TR · Substantial damage
  > The failure of the alternator belt which resulted in the failure of the main drive belt.
- [NTSB LAX01LA266](https://openairdocs.org/ntsb/LAX01LA266.md): Maule M-7-235C · Flagstaff, AZ · Accident · No injuries · Limited investigation · Final report · Jul 31, 2001 · N17FR · Substantial damage
  > The pilot's improper recovery from a bounced landing and his failure to maintain directional control, resulting in a ground loop.
- [NTSB LAX97LA158](https://openairdocs.org/ntsb/LAX97LA158.md): Devendorf Glassair GL25 · Congress, AZ · Accident · 2 fatal · Limited investigation · Final report · Apr 13, 1997 · N28BD · Destroyed
  > failure 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 LAX95LA314](https://openairdocs.org/ntsb/LAX95LA314.md): Piper PA-23-250 · Marana, AZ · Accident · 1 fatal · Limited investigation · Final report · Aug 30, 1995 · N7156T · Destroyed
  > the 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 LAX94LA253](https://openairdocs.org/ntsb/LAX94LA253.md): Schumacher Swearingen SX-300 · Kingman, AZ · Accident · No injuries · Limited investigation · Final report · Jun 12, 1994 · N2H · Substantial damage
  > the pilot's inadvertent raising the flaps during a go-around attempt. A factor in the accident was the gusty crosswind condition.
- [NTSB LAX94LA225](https://openairdocs.org/ntsb/LAX94LA225.md): Staudacher 300S · Chandler, AZ · Accident · Serious injuries · Limited investigation · Final report · May 28, 1994 · N791S · Substantial damage
  > The 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 LAX92LA235](https://openairdocs.org/ntsb/LAX92LA235.md): Mcquen Glassair III · Casa Grande, AZ · Accident · No injuries · Limited investigation · Final report · May 10, 1992 · N115DM · Substantial damage
  > Fuel 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 LAX92LA176](https://openairdocs.org/ntsb/LAX92LA176.md): Mcewen Dick Glasair III · Casa Grande, AZ · Accident · No injuries · Limited investigation · Final report · Apr 10, 1992 · N115DM · Substantial damage
  > A 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 LAX84LA210](https://openairdocs.org/ntsb/LAX84LA210.md): Maule M6235 · Mesa, AZ · Accident · No injuries · Limited investigation · Final report · Mar 7, 1984 · N56463 · Substantial damage
  > The 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 LAX82FA275](https://openairdocs.org/ntsb/LAX82FA275.md): Piper PA-601P · South Of Wicken, AZ · Accident · 2 fatal · Field investigation · Final report · Jul 24, 1982 · N3642T · Destroyed
  > At 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 LAX81FA121](https://openairdocs.org/ntsb/LAX81FA121.md): Piper PA-32R · Grand Canyon, AZ · Accident · 6 fatal · Closed · Aug 21, 1981 · N9822C · Destroyed
- [NTSB LAX80FUJ07](https://openairdocs.org/ntsb/LAX80FUJ07-127776.md): Piper PA-32 · Scottsdale, AZ · Accident · Minor injuries · Closed · Oct 24, 1980 · N8257A · Substantial damage

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
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
```

This list as a web page: https://openairdocs.org/ntsb?engine=41530&state=AZ

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OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.