# NTSB investigations: Pratt & Whitney R-985 series, 1991

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 LAX92LA042](https://openairdocs.org/ntsb/LAX92LA042.md): Beech D18S · Hilo, HI · Accident · No injuries · Limited investigation · Final report · Nov 10, 1991 · N4193 · Substantial damage
  > The aircraft's lack of single engine performance to maintain altitude after the engine lost power. Factors related to the accident were: displacement/mechanical interference within the accessory drive gear system of the left engine, failure of the left engine…
- [NTSB LAX92LA028](https://openairdocs.org/ntsb/LAX92LA028.md): Grumman G-164 · Pauma, CA · Accident · No injuries · Limited investigation · Final report · Oct 28, 1991 · N664U · Substantial damage
  > Fuel starvation due to a restricted fuel tank vent line. Contributing to the accident was inadequate maintenance.
- [NTSB FTW92LA003](https://openairdocs.org/ntsb/FTW92LA003.md): Beech C-45H · Edinburg, TX · Accident · No injuries · Limited investigation · Final report · Oct 6, 1991 · N166ZA · Substantial damage
  > Power loss due to a loss of oil pressure for undetermined reasons. A factor was the lack of suitable terrain for forced landing.
- [NTSB LAX91LA413](https://openairdocs.org/ntsb/LAX91LA413.md): Grumman G164A-450 · Queen Creek, AZ · Accident · Minor injuries · Limited investigation · Final report · Sep 29, 1991 · N16SS · Substantial damage
  > Failure of the engine cylinder, producing a loss of power. Contributing to the accident was the location of an irrigation ditch next to the landing area and a dark night light condition.
- [NTSB ANC91LA153](https://openairdocs.org/ntsb/ANC91LA153.md): De Havilland DHC-2 MKI · Holitna River, AK · Accident · Minor injuries · Limited investigation · Final report · Sep 25, 1991 · N17394 · Substantial damage
  > The airplane's float hit a submerged log during landing on the River, which resulted in the pilot losing control of the airplane and crashing into the water.
- [NTSB ANC91LA133](https://openairdocs.org/ntsb/ANC91LA133.md): Beech B-18H · White Mountain, AK · Accident · No injuries · Limited investigation · Final report · Aug 25, 1991 · N228A · Substantial damage
  > The pilot's failure to maintain directional control of the airplane during the landing roll.
- [NTSB CHI91DEP12](https://openairdocs.org/ntsb/CHI91DEP12.md): Schweizer G-164-A · Elkhorn, WI · Accident · No injuries · Final report · Aug 20, 1991 · N48635 · Substantial damage
  > The pilot in command's failure to maintain adequate altitude.
- [NTSB CHI91DTG08](https://openairdocs.org/ntsb/CHI91DTG08.md): Grumman G164B · Minto, ND · Accident · No injuries · Final report · Aug 17, 1991 · N8351K · Substantial damage
  > Inadequate aircraft servicing, inadequate aircraft preflight, fuel contamination, and unsuitable soft terrain in which to effect an emergency landing.
- [NTSB ANC91LA125](https://openairdocs.org/ntsb/ANC91LA125.md): De Havilland DHC-2 · Ugashik, AK · Accident · No injuries · Limited investigation · Final report · Aug 14, 1991 · N5371G · Substantial damage
  > Was the pilot-in-command's failure to maintain directional control of the airplane during the takeoff run. Contributing to the accident was the rough water.
- [NTSB ANC91IA102](https://openairdocs.org/ntsb/ANC91IA102.md): De Havilland DHC2 MK1 · Iliamna, AK · Incident · No injuries · Incident investigation · Final report · Jul 16, 1991 · N6LU · Minor damage
  > The pilot-in-command's attempted flight into known adverse weather conditions. Contributing to the accident was the high and gusty winds in the accident area.
- [NTSB ATL91LA132](https://openairdocs.org/ntsb/ATL91LA132.md): Boeing A75N1 · Social Circle, GA · Accident · No injuries · Limited investigation · Final report · Jul 14, 1991 · N49964 · Substantial damage
  > The airplane collided with the steel pole which supports the windsock while the pilot maneuvered to avoid a collision with a deer on the runway.
- [NTSB LAX91LA299](https://openairdocs.org/ntsb/LAX91LA299.md): Grumman G-164B · Crows Landing, CA · Accident · No injuries · Limited investigation · Final report · Jul 9, 1991 · N6628Q · Destroyed
  > The pilot Landing his airplane erroneously on the wrong Landing surface. Factors in this accident were: sunglare and its interference with the pilot's vision and the soft terrain.
- [NTSB LAX91LA283](https://openairdocs.org/ntsb/LAX91LA283.md): Boeing E75 · San Luis Obispo, CA · Accident · No injuries · Limited investigation · Final report · Jun 30, 1991 · N68809 · Substantial damage
  > That the pilot failed to properly compensate of the existing quartering tailwind, improperly using the flight controls and brakes.
- [NTSB CHI91DCJ03](https://openairdocs.org/ntsb/CHI91DCJ03.md): Grumman G-164-A · Edgar, NE · Accident · No injuries · Final report · Jun 20, 1991 · N8842H · Substantial damage
  > The pilot's inadequate aircraft preflight inspection.
- [NTSB CHI91DTG03](https://openairdocs.org/ntsb/CHI91DTG03.md): Schweizer G164 · Gwinner, ND · Accident · No injuries · Final report · Jun 16, 1991 · N48687 · Substantial damage
  > Inadvertent closing of the mixture by the pilot. Factors related to the accident are inadequate control shape, or size, and inattentiveness of the pilot.
- [NTSB DEN91LA086](https://openairdocs.org/ntsb/DEN91LA086.md): Naval Aircraft Factory N3N-3 · Deming, NM · Accident · No injuries · Limited investigation · Final report · Jun 14, 1991 · N44970 · Substantial damage
  > The pilot's failure to maintain directional control. Factors were: a crosswind condition and a soft shoulder alongside the runway.
- [NTSB LAX91LA228](https://openairdocs.org/ntsb/LAX91LA228.md): Beech C-45H · Lake Elsinore, CA · Accident · No injuries · Limited investigation · Final report · May 29, 1991 · N9903Z · Substantial damage
  > Fuel starvation due to an improper modification of the fuel system and the pilot's failure to ensure that the aircraft was airworthy prior to flight.
- [NTSB FTW91DPG10](https://openairdocs.org/ntsb/FTW91DPG10.md): Weatherly 201B · Mc Crory, AR · Accident · No injuries · Final report · May 23, 1991 · N1260W · Substantial damage
  > Loss of the outboard portion of the propeller blade. A factor was the lack of suitable terrain for the forced landing.
- [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 LAX91LA214](https://openairdocs.org/ntsb/LAX91LA214.md): Grumman G164B · Yuba City, CA · Accident · Minor injuries · Limited investigation · Final report · May 14, 1991 · N48658 · Substantial damage
  > Fatigue in the propeller blade which led to its ultimate failure. Factors relating to this accident were the soft terrain conditions on which the airplane landed and a berm across the airplane's ground path.
- [NTSB MIA91WA134](https://openairdocs.org/ntsb/MIA91WA134.md): Beech TC-45J · Nassau, Bahamas · Incident · No injuries · Foreign investigation · May 2, 1991 · N6688 · Minor damage
- [NTSB LAX91LA186](https://openairdocs.org/ntsb/LAX91LA186.md): Grumman G-164A · Madera, CA · Accident · No injuries · Limited investigation · Final report · Apr 28, 1991 · N5250 · Destroyed
  > Failure of the pilot to maintain adequate clearance from the guy wire.
- [NTSB SEA91LA086](https://openairdocs.org/ntsb/SEA91LA086.md): Grumman G-21A · Spokane, WA · Accident · No injuries · Limited investigation · Final report · Apr 17, 1991 · N9750Z · Substantial damage
  > The pilot-in-command did not maintain directional control of the airplane. Factors were: the pic's inadequate compensate for the wind, his limited flight expereince in this type of airplane, and the check airman's poor supervision.
- [NTSB FTW91DPG03](https://openairdocs.org/ntsb/FTW91DPG03.md): Grumman G-164A · Earle, AR · Accident · No injuries · Final report · Apr 2, 1991 · N5336 · Substantial damage
  > A power loss for undetrmined reasons. A factor was the muddy/soft terrain in which the forced landing was performed.
- [NTSB ANC91LA032](https://openairdocs.org/ntsb/ANC91LA032.md): De Havilland DHC-2 · Finger Lake, AK · Accident · Serious injuries · Limited investigation · Final report · Mar 3, 1991 · N5349G · No damage
  > The pilot's failure to maintain directional control of the airplane during the landing roll. A factor was the rough and uneven terrain.
- [NTSB LAX91LA088](https://openairdocs.org/ntsb/LAX91LA088.md): Grumman G-164A · Merced, CA · Accident · No injuries · Limited investigation · Final report · Feb 3, 1991 · N969X · Substantial damage
  > A disoriented and intoxicated automobile driver entering the runway in front of the departing aircraft.

## 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 year(c."eventDate") = 1991
  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&year=1991

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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.