# NTSB investigations, OR: Aircraft maintenance event

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 WPR23LA255](https://openairdocs.org/ntsb/WPR23LA255.md): Avia Stroitel AC-5M · North Plains, OR · Accident · Serious injuries · Class 3 · Limited · Final report · Jul 5, 2023 · N40233 · Substantial damage
  > The pilot’s failure to maintain control of the motor glider, which resulted in an inflight overstress separation of the right wing during a high-speed, high-wing-load spiral dive recovery. Contributing to the accident was the inadequately manufactured wing…
- [NTSB WPR14LA055](https://openairdocs.org/ntsb/WPR14LA055.md): Richard S Duncan Avid Flyer · Lakeside, OR · Accident · Serious injuries · Limited investigation · Final report · Nov 17, 2013 · N1445P · Substantial damage
  > The pilot/owner’s failure to comply with the engine manufacturer’s maintenance guidance, which resulted in the total loss of engine power due to the fracture failure of the plastic drive gear for the engine lubricating oil pump.
- [NTSB WPR13FA227](https://openairdocs.org/ntsb/WPR13FA227.md): Gates Learjet 35A · McMinnville, OR · Accident · No injuries · Field investigation · Final report · May 13, 2013 · N22MS · Substantial damage
  > Failure of maintenance personnel to reattach the landing gear squat switches following maintenance, which rendered the airplane's steering, braking, and thrust reverser systems inoperative during landing. Contributing to the accident were the failure of both…
- [NTSB WPR11LA412](https://openairdocs.org/ntsb/WPR11LA412.md): Wheeler Vans RV-6A · Albany, OR · Accident · No injuries · Limited investigation · Final report · Aug 28, 2011 · N642DW · Substantial damage
  > The in-flight separation of a propeller blade due to fatigue.
- [NTSB WPR11LA352](https://openairdocs.org/ntsb/WPR11LA352.md): Eurocopter AS 350 B3 · Troutdale, OR · Accident · No injuries · Limited investigation · Final report · Jul 27, 2011 · N808LF · Substantial damage
  > The in-flight separation of the tail rotor drive shaft cover as a result of maintenance personnel not ensuring that it was secured after a maintenance inspection; also causal was the pilot’s inadequate preflight inspection of the helicopter.
- [NTSB WPR09LA184](https://openairdocs.org/ntsb/WPR09LA184.md): Sikorsky CH-54B · Corvallis, OR · Accident · No injuries · Limited investigation · Final report · Apr 7, 2009 · N719HT · Substantial damage
  > The improper assembly of main rotor blade control components by the operator's maintenance personnel, which resulted in the main rotor blade's divergent path and their contact with the tail rotor drive shaft during ground operation following landing.
- [NTSB WPR09LA052](https://openairdocs.org/ntsb/WPR09LA052.md): Adkins Ridge Runner II · Mulino, OR · Accident · Serious injuries · Limited investigation · Final report · Nov 29, 2008 · N825PB · Substantial damage
  > The pilot's failure to attain an adequate airspeed that resulted in a stall/mush during the initial climb. Contributing to the accident were the pilot's lack of experience in this make and model airplane and the improper adjustment of the propeller pitch.

## 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" = 'OR' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '040' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent"))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/040/sequence?state=OR

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