# NTSB investigations: Boeing A75N1(PT17): Loss of engine power (partial)

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 CEN25LA025](https://openairdocs.org/ntsb/CEN25LA025.md): Boeing A75N1 · Denton, TX · Accident · No injuries · Class 4 · Limited · Final report · Oct 21, 2024 · N62394 · Substantial damage
  > The partial loss of engine power during the initial climb and the pilot’s failure to maintain directional control during the forced landing with a tailwind.
- [NTSB WPR23LA307](https://openairdocs.org/ntsb/WPR23LA307.md): Boeing A75N1(PT17) · Red Lodge, MT · Accident · No injuries · Class 3 · Limited · Final report · Aug 8, 2023 · N56907 · Substantial damage
  > A partial loss of engine power during the initial climb out due to improper maintenance of the magneto.
- [NTSB WPR21LA208](https://openairdocs.org/ntsb/WPR21LA208.md): Boeing A75N1(PT17) · Hollister, CA · Accident · Minor injuries · Class 3 · Limited · Final report · May 26, 2021 · N75016 · Substantial damage
  > The improper installation of a relief valve spring that was shorter than the standard spring length, which slowed the response of the propeller governor to change the pitch of the blades during climbout, resulting in a partial loss of power.
- [NTSB WPR21LA205](https://openairdocs.org/ntsb/WPR21LA205.md): Boeing A75N1(PT17) · Ventura, CA · Accident · No injuries · Class 4 · Limited · Final report · May 23, 2021 · N87WF · Substantial damage
  > The partial loss of engine power, during cruise flight, due to the formation of carburetor ice, which resulted in a forced landing to an open field where the airplane nosed over.
- [NTSB WPR17LA197](https://openairdocs.org/ntsb/WPR17LA197.md): Boeing A75N1(PT17) · Santa Paula, CA · Accident · Serious injuries · Limited investigation · Final report · Sep 4, 2017 · N75753 · Substantial damage
  > A partial loss of engine power during initial climb for reasons that could not be determined based on the available information.
- [NTSB WPR16LA078](https://openairdocs.org/ntsb/WPR16LA078.md): Boeing A75N1(PT17) · Palm Springs, CA · Accident · Serious injuries · Limited investigation · Final report · Mar 2, 2016 · N63555 · Substantial damage
  > Improper assembly of a fuel hose, which restricted the fuel supply to the carburetor and resulted in a loss of engine power during the initial climb after takeoff.
- [NTSB CEN15LA294](https://openairdocs.org/ntsb/CEN15LA294.md): Boeing A75N1 (PT17) · Louisburg, KS · Accident · No injuries · Limited investigation · Final report · Jul 2, 2015 · N44SN · Substantial damage
  > A partial loss of engine power for reasons that could not be determined during postaccident examinations.
- [NTSB CEN11LA375](https://openairdocs.org/ntsb/CEN11LA375.md): Boeing A75N1(PT17) · Junction City, KS · Accident · No injuries · Limited investigation · Final report · Jun 4, 2011 · N50052 · Substantial damage
  > The degraded engine performance due to low compression on the cylinder and delayed ignition timing.
- [NTSB ERA09LA433](https://openairdocs.org/ntsb/ERA09LA433.md): Boeing A75N1 · Livermore Falls, ME · Accident · No injuries · Limited investigation · Final report · Aug 1, 2009 · N49778 · Substantial damage
  > A loss of engine power for undetermined reasons.

## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('1380134')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s.case_mkey = x.case_mkey AND s.aircrafts_position = x.position AND s."tier2Number" = '342' 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/342/sequence?model=1380134

---
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.