# Final 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 NYC08IA290](https://openairdocs.org/ntsb/NYC08IA290.md): Boeing 747-209B · Bogota, Colombia · Incident · No injuries · Incident investigation · Final report · Aug 26, 2008 · N715CK · No damage
  > The combination of fan blade edge contour, variable blade trim, and the high altitude, which resulted in an engine surge.
- [NTSB ANC05IA020](https://openairdocs.org/ntsb/ANC05IA020.md): Boeing 747-123 · Anchorage, AK · Incident · No injuries · Incident investigation · Final report · Dec 29, 2004 · N858FT · Minor damage
  > The failure of a high-pressure fuel line fitting, which resulted in an engine fire during takeoff/initial climb.
- [NTSB IAD03IA007](https://openairdocs.org/ntsb/IAD03IA007.md): Boeing 767-222 · Boston, MA · Incident · No injuries · Incident investigation · Final report · Oct 19, 2002 · N607UA · Minor damage
  > An inadvertant collision with birds during the initial climb out.
- [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 MIA96FA013](https://openairdocs.org/ntsb/MIA96FA013.md): Boeing 747-121 · Miami, FL · Accident · No injuries · Field investigation · Final report · Oct 23, 1995 · N613FF · Substantial damage
  > failure of the No. 4 engine fifth stage turbine hub due to a cyclic stress rupture for undetermined reasons, which resulted in an uncontained failure of the engine.
- [NTSB NYC95IA192](https://openairdocs.org/ntsb/NYC95IA192.md): Boeing 747-130 · Jamaica, NY · Incident · No injuries · Incident investigation · Final report · Aug 14, 1995 · N603FF · Minor damage
  > failure and separation of the #1 engine turbine shroud assembly, which resulted in an uncontained engine failure, a puncture of the #2 outboard reserve fuel tank plate, and a fuel leak.
- [NTSB CHI95LA188](https://openairdocs.org/ntsb/CHI95LA188.md): Boeing 767-222 · Champagne, IL · Accident · Serious injuries · Limited investigation · Final report · Jun 20, 1995 · N606UA · No damage
  > an in-flight encounter with turbulence.
- [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 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 BFO92IA046](https://openairdocs.org/ntsb/BFO92IA046.md): Boeing 747-123 · Louisville, KY · Incident · No injuries · Incident investigation · Final report · Mar 19, 1992 · N681UP · Minor damage
  > Inadequate obstacle clearance, which resulted in on ground collision with a blast fence. Contributing was inadequate instruction from ground personnel.
- [NTSB DCA89IA066](https://openairdocs.org/ntsb/DCA89IA066.md): Mcdonnell Douglas DC-10-40 · Denver, CO · Incident · No injuries · Incident investigation · Final report · Aug 10, 1989 · N133JC · Minor damage
  > Fatigue failure and separation of a first-stage compressor fan blade.
- [NTSB DCA88IA044](https://openairdocs.org/ntsb/DCA88IA044.md): Mcdonnell Douglas DC-10-40 · Boston, MA · Incident · No injuries · Incident investigation · Final report · Mar 30, 1988 · N154US · Minor damage
  > The improper installation of the battery ground connection that resulted in premature loosening of the connection and electrical arc ignition of pooled fuel in the cac bilge. The fuel was not drained overboard due to inoperative cac bilge area drain valves.…
- [NTSB CHI88IA073](https://openairdocs.org/ntsb/CHI88IA073.md): Boeing 747-227B · Chicago, IL · Incident · No injuries · Incident investigation · Final report · Feb 19, 1988 · N635US · 2 aircraft · No damage
  > Failure of the tower cab supervisor to assure that coordination between the south local controller and north local controller had been completed. A factor is the failure of FAA tower management to insure there were personnel manning the cab coordinator…
- [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 CHI88IA003](https://openairdocs.org/ntsb/CHI88IA003.md): Mcdonnell Douglas DC-10-40 · Milwaukee, WI · Incident · No injuries · Incident investigation · Final report · Oct 5, 1987 · N157US · Minor damage
  > Aircraft landed without further incident after exhaust centerbody fell away from the #1 engine during initial climb. The centerbody landed on private property with no property damage. A service bulletin issued by the manufacturer to inspect the centerbody and…
- [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 SEA84IA233](https://openairdocs.org/ntsb/SEA84IA233.md): Boeing 747-200B · Seattle, WA · Incident · No injuries · Incident investigation · Final report · Sep 29, 1984 · N613US · Minor damage
  > During climbout, passing thru 4000 ft MSL, the acft experienced a failure of the #2 engine. The crew reported hearing an explosive sound followed by a drop in fuel flow with N1 speed decreasing to 30% RPM on the #2 engine. The acft returned to Seattle for an…
- [NTSB CHI84IA196](https://openairdocs.org/ntsb/CHI84IA196.md): McDonnell Douglas DC-10-40 · Minneapolis, MN · Incident · No injuries · Incident investigation · Final report · May 17, 1984 · N150US · Minor damage
  > During climb from FL330 to FL370 the 1st officer saw sparks and smoke coming from the left side panel under his glare shield. Cockpit lights were turned off and smoke stopped. Flt returned to Minneapolis and landed without incident. Inspection of the acft…
- [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…
- [NTSB CHI82IA015](https://openairdocs.org/ntsb/CHI82IA015.md): Douglas DC-10 · Minneapolis, MN · Incident · No injuries · Closed · Nov 17, 1981 · N156US · Minor damage
- [NTSB UNK79X0111](https://openairdocs.org/ntsb/UNK79X0111.md): Boeing 747 · Frankfurt, Georgia · Accident · No injuries · Closed · Apr 16, 1979 · N617US · Substantial damage
- [NTSB NYC78FA008](https://openairdocs.org/ntsb/NYC78FA008.md): Boeing 747F · Jamaica, NY · Accident · No injuries · Closed · Nov 17, 1977 · N616US · Substantial damage
- [NTSB NYC77IA041](https://openairdocs.org/ntsb/NYC77IA041.md): Boeing 747 · London, United Kingdom · Incident · No injuries · Closed · Mar 24, 1977 · N747PA · No damage
- [NTSB CHI75AC073](https://openairdocs.org/ntsb/CHI75AC073.md): Douglas DC-10 · Lacrosse, WI · Accident · Serious injuries · Closed · Mar 13, 1975 · N149US · No damage
- [NTSB OAK75AP013](https://openairdocs.org/ntsb/OAK75AP013.md): Boeing 747 · No.Pacific Ocean (Pacific Ocean) · Accident · Serious injuries · Closed · Sep 21, 1974 · N615US · No damage
- [NTSB DCA72AZ002](https://openairdocs.org/ntsb/DCA72AZ002.md): Boeing 747 · San Frncsco, CA · Accident · Serious injuries · Closed · Jul 30, 1971 · N747PA · Substantial damage
- [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."completionStatus" = 'Completed'
  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&status=final

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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.