# NTSB investigations: Pratt & Whitney JT9D-3A: Airframe/component/system failure/malfunction

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 ANC99IA025](https://openairdocs.org/ntsb/ANC99IA025.md): Boeing 747-100 · Fairbanks, AK · Incident · No injuries · Incident investigation · Final report · Jan 19, 1999 · N481EV · Minor damage
  > The improper overhaul of the thrust reverser pneumatic drive unit, and the subsequent failure of the thrust reverser actuator. Factors associated with the incident were the inadequate quality assurance procedures by the overhaul company.
- [NTSB CHI93IA248](https://openairdocs.org/ntsb/CHI93IA248.md): Mcdonnell Douglas DC-10-40 · Detroit, MI · Incident · No injuries · Incident investigation · Final report · Jul 10, 1993 · N158US · No damage
  > the failure of a navigation system (#1 INS) for reason or reasons undetermined.
- [NTSB CHI88IA040](https://openairdocs.org/ntsb/CHI88IA040.md): Boeing 747-251F · Minneapolis, MN · Incident · No injuries · Incident investigation · Final report · Jan 9, 1988 · N618US · No damage
  > Aircraft experienced a loss of aileron ctl when ice formed around aileron control cables and restricted their movement. Water draining through open plenum drains in the main landing gear wheel well froze when exposed to below freezing temperatures at 35,000…
- [NTSB CHI83IA228](https://openairdocs.org/ntsb/CHI83IA228.md): Mcdonnell Douglas DC-10-40 · Clarion, PA · Incident · No injuries · Incident investigation · Final report · May 26, 1983 · N154US · No damage
  > During descent in turbulence the crew noted all 3 engines were overtempting and experiencing compressor stalls. Attemptsto reduce throttles did not reduce the temperatures. No 183 engines were shut down. During diversion to a close airport the engines were…

## 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 ('52050')
    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" = 130))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=52050&occurrence=130

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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.