# NTSB investigations: Pratt & Whitney R-985 series, CO

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 CEN17LA301](https://openairdocs.org/ntsb/CEN17LA301.md): Beech D17S · Colorado Springs, CO · Accident · No injuries · Limited investigation · Final report · Aug 3, 2017 · N44562 · Substantial damage
  > The pilot's failure to maintain directional control during the landing roll with a quartering tailwind.
- [NTSB GAA16CA146](https://openairdocs.org/ntsb/GAA16CA146.md): Beech D17 · Brighton, CO · Accident · Minor injuries · Data collection · Final report · Mar 11, 2016 · N9290H · Substantial damage
  > The pilot's failure to maintain the runway course during takeoff, resulting in the airplane drifting to the left and impacting a fence. A contributing factor to the accident was the pilot's diverted attention during the takeoff.
- [NTSB GAA15CA294](https://openairdocs.org/ntsb/GAA15CA294.md): Howard DGA 15P · Englewood, CO · Accident · No injuries · Data collection · Final report · Sep 25, 2015 · N1785H · Substantial damage
  > The separation of the elevator control system linkage at a push/pull tube and cable joint, for an unknown reason, because the bolt and associated hardware securing the joint was not found for examination.
- [NTSB CEN11FA444](https://openairdocs.org/ntsb/CEN11FA444.md): Boeing B75N1 · Wetmore, CO · Accident · 1 fatal · Field investigation · Final report · Jul 3, 2011 · N4473N · Substantial damage
  > The pilot's failure to maintain clearance from terrain while maneuvering at low altitude.
- [NTSB DEN07LA122](https://openairdocs.org/ntsb/DEN07LA122.md): Beech C-45H · Longmont, CO · Accident · Serious injuries · Limited investigation · Final report · Jul 19, 2007 · N9562Z · Destroyed
  > The instructor pilot's improper preflight in that he failed to close the rocker box recovery system drain valves, resulting in a total loss of lubricating oil and subsequent oil starvation to both engines. A contributing factor was the trees.
- [NTSB DEN02LA091](https://openairdocs.org/ntsb/DEN02LA091.md): Boeing D75N1 · Watkins, CO · Accident · No injuries · Limited investigation · Final report · Aug 13, 2002 · N64796 · Substantial damage
  > the pilot's improper recovery from a bounced landing, resulting in an inadvertent ground loop. A contributing factor was the flight instructor's inadequate supervision of the pilot.
- [NTSB DEN00LA172](https://openairdocs.org/ntsb/DEN00LA172.md): Boeing Stearman D75N1 · Englewood, CO · Accident · No injuries · Limited investigation · Final report · Sep 20, 2000 · N64796 · Substantial damage
  > the flight instructor not maintaining supervision. Contributing factors were the student's hard landing due to excessive flare and subsequent inadvertent stall, and the student's failure to maintain directional control during landing roll.
- [NTSB DEN00LA072](https://openairdocs.org/ntsb/DEN00LA072.md): Weatherly 201B · Rocky Ford, CO · Accident · Minor injuries · Limited investigation · Final report · Apr 8, 2000 · N1292W · Substantial damage
  > A total loss of power due to an engine rocker arm failure and soft/unsuitable terrain during the subsequent forced landing.
- [NTSB FTW96LA057](https://openairdocs.org/ntsb/FTW96LA057.md): Beech D18S · Loveland, CO · Accident · Serious injuries · Limited investigation · Final report · Nov 30, 1995 · N8603A · Destroyed
  > The second pilot's failure to compensate for wind conditions and his improper recovery from a bounced landing, and the pilot-in-command's inadequate supervision of the flight. Factors were the second pilot's lack of landing experience in the airplane…
- [NTSB FTW95LA341](https://openairdocs.org/ntsb/FTW95LA341.md): Boeing B75N1 · Englewood, CO · Accident · No injuries · Limited investigation · Final report · Aug 14, 1995 · N735YP · Substantial damage
  > Failure by the pilot to maintain directional control which resulted in a ground loop. A factor was crosswind.
- [NTSB FTW94LA142](https://openairdocs.org/ntsb/FTW94LA142.md): Grumman G-164A · Lindon, CO · Accident · No injuries · Limited investigation · Final report · May 1, 1994 · N8559H · Substantial damage
  > Inaccurate preflight planning and preparation for the flight. A factor was soft terrain on the landing strip.
- [NTSB DEN92LA049](https://openairdocs.org/ntsb/DEN92LA049.md): Naval Aircraft Factory N3N-3 · Montrose, CO · Accident · Minor injuries · Limited investigation · Final report · Apr 30, 1992 · N45033 · Substantial damage
  > Failure of the pilot in command to maintain control of the aircraft during landing roll. A factor was: the aircraft struck a ditch which ran parallel to the runway.
- [NTSB DEN91LA073](https://openairdocs.org/ntsb/DEN91LA073.md): Beech D18-S · Englewood, CO · Accident · No injuries · Limited investigation · Final report · May 18, 1991 · N44623 · Substantial damage
  > The loss of directional control by the pilot. Factors were: the cross, failure of the pilot to lock the tail wheel, and the pilot's disregard of crosswind limitations.
- [NTSB DEN90LA186](https://openairdocs.org/ntsb/DEN90LA186.md): Beech D17S · Englewood, CO · Accident · Minor injuries · Limited investigation · Final report · Sep 14, 1990 · N16M · Substantial damage
  > Improper planning/decision by the pilot and inadequate visual lookout by the vehicle driver, which resulted in their failure to assure clearance between the vehicle and aircraft. Factors related to the accident were: sunglare and the pilot's restricted view…
- [NTSB DEN89LA201](https://openairdocs.org/ntsb/DEN89LA201.md): Waco UPF7 · Watkins, CO · Accident · No injuries · Limited investigation · Final report · Aug 27, 1989 · N2369Q · Substantial damage
  > Failure of the left brake assembly, and subsequent loss of directional control by the pilot.
- [NTSB DEN88DTE04](https://openairdocs.org/ntsb/DEN88DTE04.md): Grumman G-164A · Vona, CO · Accident · No injuries · Final report · May 7, 1988 · N8518H · Substantial damage
  > The pilot said the wind was calm when he got in the aircraft before takeoff. He said that when the aircraft reached about 50 feet AGL, after takeoff, he encountered a tailwind. The aircraft settled and collided with the ground. The ground was soft and the…
- [NTSB DEN87DTE03](https://openairdocs.org/ntsb/DEN87DTE03.md): Grumman-Schweizer G-164A · Springfield, CO · Accident · No injuries · Final report · Aug 4, 1987 · N8953H · Substantial damage
  > The plt rprtd the eng lost pwr drg an aerial application flt & the acft nosed over drg a forced lndg in a soft, wet, terraced fld. There had been hvy rain on the previous day. An investigation revealed the acft had been refueled from a fuel tank mounted on a…
- [NTSB DEN84LA170](https://openairdocs.org/ntsb/DEN84LA170.md): Weatherly 201B · Platteville, CO · Accident · Minor injuries · Limited investigation · Final report · Jun 7, 1984 · N1275W · Substantial damage
  > The ag plt was returning for his 3rd load. He said that after a wheel landing, he pulled back on the stick to lower the tailwheel & the acft ballooned back into the air. The plt said that he applied power to go around, but the acft settled & he lost…
- [NTSB DEN82DA142](https://openairdocs.org/ntsb/DEN82DA142.md): Beechcraft C-45H · Aurora, CO · Accident · No injuries · Final report · Jul 25, 1982 · N444Q · Substantial damage
  > The pilot reported that he was unable to extend the landing gear by using either the normal or emergency systems. After repeated attempts to extend the gear, he elected to land with it configured in a free-fall position. He shut down and feathered both…
- [NTSB DEN79FTE31](https://openairdocs.org/ntsb/DEN79FTE31.md): Beech C45H · Firestone, CO · Accident · No injuries · Closed · Apr 18, 1979 · N6495D · Substantial damage
- [NTSB DEN78FTE77](https://openairdocs.org/ntsb/DEN78FTE77-140833.md): Weatherly 201C · Lucerne, CO · Accident · No injuries · Closed · Jul 26, 1978 · N1289W · Substantial damage
- [NTSB DEN78FTE77](https://openairdocs.org/ntsb/DEN78FTE77-201260.md): Beech D-18S · Trinidad, CO · Accident · No injuries · Closed · Jul 28, 1977 · N244V · Substantial damage
- [NTSB DEN77DTE13](https://openairdocs.org/ntsb/DEN77DTE13.md): Beech C45H · Buena Vista, CO · Accident · No injuries · Closed · Jul 8, 1976 · N1597 · Substantial damage
- [NTSB DEN76AD030](https://openairdocs.org/ntsb/DEN76AD030.md): Weatherly 201B · Two Buttes, CO · Accident · No injuries · Closed · Feb 17, 1976 · N1294W · Substantial damage
- [NTSB DEN74FTE16](https://openairdocs.org/ntsb/DEN74FTE16.md): Boeing A75N1 · Sheridan Lke, CO · Accident · No injuries · Closed · Aug 25, 1973 · N55971 · Substantial damage
- [NTSB DEN73FTE20](https://openairdocs.org/ntsb/DEN73FTE20.md): Beech C-45H · Boulder, CO · Accident · No injuries · Closed · Aug 20, 1972 · N139V · Substantial damage
- [NTSB DEN71AD021](https://openairdocs.org/ntsb/DEN71AD021.md): Beech D18S · Aurora, CO · Accident · Minor injuries · Closed · Oct 24, 1970 · N342D · Substantial damage
- [NTSB DEN68D0259](https://openairdocs.org/ntsb/DEN68D0259.md): Boeing A75N1 · Anton, CO · Accident · No injuries · Closed · Apr 20, 1968 · N60417 · Substantial damage
- [NTSB DEN67F0064](https://openairdocs.org/ntsb/DEN67F0064.md): Naval Fcty N3N-3 · Eaton, CO · Accident · No injuries · Closed · Jul 21, 1966 · N45229 · 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" = 'CO' 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 ('52008'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=52008&state=CO

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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.