# NTSB investigations: Lycoming VO-435 series, AK

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 ANC87FA043](https://openairdocs.org/ntsb/ANC87FA043.md): Bell 47G-2 · Anchorage, AK · Accident · No injuries · Field investigation · Final report · Mar 7, 1987 · N6140C · Substantial damage
  > A flight instructor and his commercial rotorcraft student were practicing quick stops to a hover at low altitude over a snow covered non-maintained airstrip. The student, a commercially rated fixed wing pilot, had successfully completed three quick stops, but…
- [NTSB ANC84LA097](https://openairdocs.org/ntsb/ANC84LA097.md): Piper PA-32-260 · Igiugig, AK · Accident · No injuries · Limited investigation · Final report · Jun 2, 1984 · N4732S · Substantial damage
  > During flt, the plt heard a 'loud bang' & then the eng lost power. He transmitted a mayday call & made an emergency landing on rolling tundra. During the landing, the nose & left main gear failed & the wing & prop were damaged. An exam revealed that the eng…
- [NTSB ANC83FA092](https://openairdocs.org/ntsb/ANC83FA092.md): Bell B47G-2 · Anchorage, AK · Accident · No injuries · Field investigation · Final report · Jun 7, 1983 · N6140C · Substantial damage
  > The helicopter experienced a tail rotor strike during a hard landing with a door open. According to the student pilot who is a commercial pilot working on an add-on helicopter rating, the left cockpit door unlatched and partially opened on the downwind leg…
- [NTSB ANC83LA035](https://openairdocs.org/ntsb/ANC83LA035.md): Bell 47G-2 · Anchorage, AK · Accident · Minor injuries · Limited investigation · Final report · Jan 19, 1983 · N2822B · Substantial damage
  > The helicopter made a landing during which the tail boom was severed. This was a dual instructional flight and accordingto the instructor, a high reconnaissance was performed before selecting their approach to the pinnacle. The pinnacle is a 3000 foot landing…
- [NTSB ANC79DAA33](https://openairdocs.org/ntsb/ANC79DAA33.md): Bell 47G-2 · Ruby, AK · Accident · Minor injuries · Closed · Sep 3, 1979 · N12848 · Substantial damage
- [NTSB ANC75AA029](https://openairdocs.org/ntsb/ANC75AA029.md): Bell 47G-2 · Hurricane, AK · Accident · No injuries · Closed · Aug 27, 1975 · N6140C · Substantial damage
- [NTSB ANC76AA013](https://openairdocs.org/ntsb/ANC76AA013.md): Hiller Acft UH-12D · Nome, AK · Accident · Minor injuries · Closed · Jul 28, 1975 · N87578 · Substantial damage
- [NTSB ANC75AAG87](https://openairdocs.org/ntsb/ANC75AAG87.md): Bell 47G-2 · Anchorage, AK · Accident · No injuries · Closed · May 1, 1975 · N6140C · Substantial damage
- [NTSB ANC74AA069](https://openairdocs.org/ntsb/ANC74AA069.md): Bell 47G-2 · Seward, AK · Accident · Minor injuries · Closed · Apr 23, 1974 · N2822B · Substantial damage
- [NTSB ANC73AA006](https://openairdocs.org/ntsb/ANC73AA006.md): Bell 47G-2 · Deadhorse, AK · Accident · No injuries · Closed · Jul 18, 1972 · N959 · Substantial damage
- [NTSB ANC72DAG11](https://openairdocs.org/ntsb/ANC72DAG11.md): Hiller 12-E4 · Chitina, AK · Accident · Serious injuries · Closed · Jul 20, 1971 · N9759C · Substantial damage
- [NTSB ANC71FAA19](https://openairdocs.org/ntsb/ANC71FAA19.md): Bell 47G-2 · Fairbanks, AK · Accident · No injuries · Closed · Sep 25, 1970 · N977B · Substantial damage
- [NTSB ANC70D0037](https://openairdocs.org/ntsb/ANC70D0037.md): Bell 47G-2 · Cordova, AK · Accident · No injuries · Closed · Aug 29, 1969 · N2822B · Substantial damage
- [NTSB ANC70A0006](https://openairdocs.org/ntsb/ANC70A0006.md): Bell 47G-2 · King Salmon, AK · Accident · No injuries · Closed · Jul 16, 1969 · N59H · Substantial damage
- [NTSB ANC69A0053](https://openairdocs.org/ntsb/ANC69A0053.md): Bell 47G-2 · Oliktok, AK · Accident · No injuries · Closed · May 6, 1969 · N6701D · Substantial damage
- [NTSB ANC69D0040](https://openairdocs.org/ntsb/ANC69D0040.md): Bell 47G-2 · Minchumina, AK · Accident · No injuries · Closed · Jul 14, 1968 · N6711D · Substantial damage
- [NTSB ANC68A0004](https://openairdocs.org/ntsb/ANC68A0004.md): Bell 47G-2 · Cordova, AK · Accident · 1 fatal · Closed · Jul 27, 1967 · N8406E · Destroyed
- [NTSB ANC67A0050](https://openairdocs.org/ntsb/ANC67A0050.md): Bell 47G-2A · Kenai, AK · Accident · Minor injuries · Closed · Dec 28, 1966 · N73220 · Substantial damage
- [NTSB ANC67A0014](https://openairdocs.org/ntsb/ANC67A0014.md): Bell 47G-2 · Tyonek, AK · Accident · No injuries · Closed · Jul 24, 1966 · N6717D · Substantial damage
- [NTSB ANC67A0012](https://openairdocs.org/ntsb/ANC67A0012.md): Bell 47G-2 · Copper Cntr, AK · Accident · No injuries · Closed · Jul 21, 1966 · N6141 · Substantial damage
- [NTSB ANC67A0003](https://openairdocs.org/ntsb/ANC67A0003.md): Bell 47G-2 · Cordova, AK · Accident · No injuries · Closed · Jul 7, 1966 · N8406E · Substantial damage
- [NTSB ANC66A0004](https://openairdocs.org/ntsb/ANC66A0004.md): Bell 47G2 · Kakhonak, AK · Accident · No injuries · Closed · Aug 17, 1965 · N977B · Substantial damage
- [NTSB ANC65A0053](https://openairdocs.org/ntsb/ANC65A0053.md): Bell 47G2 · Port Moller, AK · Accident · No injuries · Closed · May 30, 1965 · N7888B · Substantial damage
- [NTSB ANC65A0051](https://openairdocs.org/ntsb/ANC65A0051.md): Bell 47G2 · Delta Junc, AK · Accident · No injuries · Closed · May 21, 1965 · N5196B · Substantial damage
- [NTSB ANC65A0047](https://openairdocs.org/ntsb/ANC65A0047.md): Bell 47G3 · Anchorage, AK · Accident · Serious injuries · Closed · Apr 27, 1965 · N8413E · Destroyed
- [NTSB UNK65X0560](https://openairdocs.org/ntsb/UNK65X0560.md): Bell 47G2 · Umiat, AK · Accident · No injuries · Closed · Nov 4, 1964 · N6717D · Substantial damage
- [NTSB UNK64X4107](https://openairdocs.org/ntsb/UNK64X4107.md): Bell 47G2 · Tyone, AK · Accident · No injuries · Closed · Sep 22, 1964 · N7888B · 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" = 'AK' 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 ('41525'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41525&state=AK

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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.