# NTSB investigations: Lycoming T-53 series: In flight collision with object

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 LAX07TA227](https://openairdocs.org/ntsb/LAX07TA227.md): Bell 205 A1++ · Happy Camp, CA · Accident · 1 fatal · Final report · Jul 23, 2007 · N205BR · Destroyed
  > the pilot's failure to maintain clearance with the trees during a long-line operation. Contributing factors were the Forest Service's inadequate communication between crews, failure to properly assess the safety of the intended drop zone, reduced visibility…
- [NTSB SEA05CA086](https://openairdocs.org/ntsb/SEA05CA086.md): Williams Helicopter UH-1B · Uniontown, WA · Accident · No injuries · Data collection · Final report · Apr 25, 2005 · N334WN · Substantial damage
  > The pilot's failure to maintain clearance from an object while maneuvering, which resulted in the main rotor blades striking a power pole. The power pole was a factor in the accident.
- [NTSB LAX95LA075](https://openairdocs.org/ntsb/LAX95LA075.md): Kaman HH43 · Glendale, AZ · Accident · No injuries · Limited investigation · Final report · Jan 10, 1995 · N321WN · Substantial damage
  > The pilot's failure to maintain an adequate visual lookout to avoid a collision with a tree during an aerial application swath run.
- [NTSB LAX83LA022](https://openairdocs.org/ntsb/LAX83LA022.md): Bell UH-1B · Delano, CA · Accident · Minor injuries · Limited investigation · Final report · Oct 28, 1982 · N15FC · Destroyed
  > The pilot was making a helicopter spray run and decended into trees on th irst pass after reloading. He got a low RPM light in a reduced power situation. No malfunctions were found. The pilot had made 34 similiar operations during this schedule.

## 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.engine_model_code IN ('41552', '41549', '41587')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 220))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41552&occurrence=220

---
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.