# NTSB investigations: Lycoming IO-320 series, WA

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 WPR26LA163](https://openairdocs.org/ntsb/WPR26LA163.md): Piper PA30 · Auburn, WA · Accident · Minor injuries · Class 3 · Limited · Preliminary report · Apr 18, 2026 · N741TJ · Substantial damage
  > On April 18, 2026, about 1330 Pacific daylight time, a Piper PA-30 Twin Comanche, N741TJ, was substantially damaged when it was involved in an accident near Auburn, Washington. The pilot and pilot-rated passenger sustained minor injuries. The airplane was…
- [NTSB WPR20LA180](https://openairdocs.org/ntsb/WPR20LA180.md): Bellanca 7KCAB · Renton, WA · Accident · Minor injuries · Class 3 · Limited · Final report · Jun 12, 2020 · N36339 · Substantial damage
  > Maintenance personnel’s inadequate post-maintenance inspections that resulted in the total loss of engine power due to a blockage in the air intake.
- [NTSB WPR14LA298](https://openairdocs.org/ntsb/WPR14LA298.md): Piper PA 30 · Othello, WA · Accident · No injuries · Limited investigation · Final report · Jul 17, 2014 · N7981Y · Substantial damage
  > The partial loss of engine power for reasons that could not be determined based on the available information.
- [NTSB WPR09LA372](https://openairdocs.org/ntsb/WPR09LA372.md): Piper PA-30 · Walla Walla, WA · Accident · No injuries · Limited investigation · Final report · Jul 22, 2009 · N7504Y · Substantial damage
  > A tripped landing gear motor circuit breaker, which prevented the gear from fully locking in the down position, and subsequent collapse during landing. Contributing to the accident was the disabled landing gear warning horn.
- [NTSB WPR09CA342](https://openairdocs.org/ntsb/WPR09CA342.md): Mid-South Custom Craft SH-2R · Sequim, WA · Accident · No injuries · Data collection · Final report · Jul 12, 2009 · N370LR · Substantial damage
  > The total loss of engine power due to fuel starvation as a result of the pilot's failure to reposition the fuel selector to the main tank. Contributing to the accident was the pilot's failure to properly complete the pre-takeoff checklist.
- [NTSB SEA07LA059](https://openairdocs.org/ntsb/SEA07LA059.md): Barnhart RV-6 · Auburn, WA · Accident · Minor injuries · Limited investigation · Final report · Feb 21, 2007 · N601DB · Substantial damage
  > A loss of engine power due to the obstruction of the engine's air inlet by a fabricated neoprene seal, and inadequate maintenance by unknown maintenance personnel. A contributing factor was the lack of suitable terrain for a forced landing.
- [NTSB SEA98LA085](https://openairdocs.org/ntsb/SEA98LA085.md): Piper PA-30 · Everett, WA · Accident · 1 fatal · Limited investigation · Final report · Jun 4, 1998 · N98NT · Minor damage
  > The pilot-in-command's exiting the aircraft with both engines running to remove a wheel chock. A factor was the inadequate preflight of the aircraft (not removing the chock) prior to engine start.
- [NTSB SEA96FA133](https://openairdocs.org/ntsb/SEA96FA133.md): Bellanca 8KCAB · Pomeroy, WA · Accident · 1 fatal · Field investigation · Final report · Jun 21, 1996 · N57514 · Destroyed
  > The pilot's failure to maintain adequate clearance with the surrounding terrain while maneuvering to land. A factor was the rising terrain conditions.
- [NTSB SEA90LA075](https://openairdocs.org/ntsb/SEA90LA075.md): Bellanca 8KCAB · Pomeroy, WA · Accident · No injuries · Limited investigation · Final report · May 7, 1990 · N57514 · Substantial damage
  > A malfunctioning fuel injection system and the pilot's attempted operation above certificated maximum gross weight with a known deficiency in this equipment.
- [NTSB SEA88LA068](https://openairdocs.org/ntsb/SEA88LA068.md): Bellanca 7KCAB · Palmer, WA · Accident · Serious injuries · Limited investigation · Final report · Mar 28, 1988 · N86820 · Destroyed
  > While on a VFR cross country flight the pilot encountered instrument meteorological conditions along his route. The aircraft was not instrument equipped, even though the pilot is instrument rated. The pilot had to make two precautionary landings prior to the…
- [NTSB SEA87LA046](https://openairdocs.org/ntsb/SEA87LA046.md): Bellanca 7KCAB · Bremerton, WA · Accident · No injuries · Limited investigation · Final report · Jan 11, 1987 · N36339 · Substantial damage
  > Plt with less than 2 hrs as PIC in Bellanca 7KCAB acft stalled on approach to runway. Plt reported winds estimated at 10 KTS with gusts to 15 KTS. Acft stalled about 30 feet above runway and impacted on the nose at about 30 degree angle.
- [NTSB SEA81FYE02](https://openairdocs.org/ntsb/SEA81FYE02.md): Champion 8KCAB · Lester, WA · Accident · Serious injuries · Closed · Oct 5, 1980 · N33MJ · Substantial damage
- [NTSB SEA78DYP18](https://openairdocs.org/ntsb/SEA78DYP18.md): Piper PA-30 · Tekoa, WA · Accident · No injuries · Closed · Mar 10, 1978 · N7672Y · Substantial damage
- [NTSB SEA76FYE28](https://openairdocs.org/ntsb/SEA76FYE28.md): Champion 7KCAB · Copalis, WA · Accident · Serious injuries · Closed · Mar 20, 1976 · N1843G · Substantial damage
- [NTSB SEA75FYG02](https://openairdocs.org/ntsb/SEA75FYG02.md): Bellanca 8KCAB · Deer Park, WA · Accident · Minor injuries · Closed · Jul 14, 1974 · N33MJ · Destroyed
- [NTSB SEA66F0299](https://openairdocs.org/ntsb/SEA66F0299.md): Piper PA-30 · Pasco, WA · Accident · No injuries · Closed · May 25, 1966 · N7068Y · Substantial damage
- [NTSB UNK65X0348](https://openairdocs.org/ntsb/UNK65X0348.md): Piper PA30 · Everett, WA · Accident · No injuries · Closed · Oct 20, 1964 · N7048Y · 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" = 'WA' 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 ('41509'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41509&state=WA

---
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.