# Major NTSB investigations: Pratt & Whitney JT9D-3A

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 DCA93MA033](https://openairdocs.org/ntsb/DCA93MA033.md): Boeing 747-121 · Anchorage, AK · Accident · No injuries · Class 1 · Major · Final report · Mar 31, 1993 · N473EV · Substantial damage
  > The lateral separation of the no. 2 engine pylon due to an encounter with severe or possibly extreme turbulence that resulted in dynamic multi-axis lateral loadings that exceeded the ultimate lateral load-carrying capability of the pylon, which was already…
- [NTSB DCA85AA015](https://openairdocs.org/ntsb/DCA85AA015.md): Boeing 747 SP-09 · San Francisco, CA · Accident · Serious injuries · Final report · Feb 19, 1985 · N4522V · Substantial damage
  > While abv a cloud layer (top at FL 370) nr the jet stream, autoplt was engaged & was in the performance mngmnt sys (pms)mode. The pms provided pitch guidance to hold FL 410, roll guidance to ailerons & spoilers for roll ctl & autothrottle to maint.85 mach…
- [NTSB FTW70AF046](https://openairdocs.org/ntsb/FTW70AF046.md): Douglas DC-9 · Harlingen, TX · Accident · No injuries · Closed · Jan 11, 1970 · N1308T · 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.board_report_url IS NOT NULL OR c."investigationClass" = 'Class 1' OR c."caseType" = 'Major - Launch')
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('52050'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=52050&major=1

---
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.