# NTSB investigations: Pratt & Whitney R1340 series

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.

Page 16 of 34 · 1,656 cases

## Cases, newest first

- [NTSB MIA91LA183](https://openairdocs.org/ntsb/MIA91LA183.md): Grumman G-164A · Greenwood, FL · Accident · No injuries · Limited investigation · Final report · Jul 11, 1991 · N6891Q · Destroyed
  > The inadequate preflight which resulted in debris in the cockpit which reduced the pilot's visual lookout. Unsuitable terrain encountered during the landing was a factor.
- [NTSB LAX91LA301](https://openairdocs.org/ntsb/LAX91LA301.md): Grumman G-164B · Eloy, AZ · Accident · No injuries · Limited investigation · Final report · Jul 9, 1991 · N6633K · Substantial damage
  > The failure of the pilot to maintain the terrain clearance of the aircraft while maneuvering for a potential emergency landing on a moonless dark night.
- [NTSB MIA91LA169](https://openairdocs.org/ntsb/MIA91LA169.md): Grumman G164B · Immokalee, FL · Accident · No injuries · Limited investigation · Final report · Jun 26, 1991 · N3629X · Substantial damage
  > Loss of enine power due to undetermined reasons. Contributing to the accident was unsuitable terrain encounteered during the forced landing.
- [NTSB FTW91DRG03](https://openairdocs.org/ntsb/FTW91DRG03.md): Grumman G-164A · Weslaco, TX · Accident · Serious injuries · Final report · Jun 8, 1991 · N7445 · Destroyed
  > Failure of the pilot to maintain clearance.
- [NTSB MIA91LA158](https://openairdocs.org/ntsb/MIA91LA158.md): Air Tractor AT-301 · High Springs, FL · Accident · No injuries · Limited investigation · Final report · Jun 2, 1991 · N8841S · Substantial damage
  > Loss of engine power due to disintegration of the impeller caused by a worn impeller bearing.
- [NTSB SEA91LA136](https://openairdocs.org/ntsb/SEA91LA136.md): Schweizer G-164B · Wilson Creek, WA · Accident · No injuries · Limited investigation · Final report · May 27, 1991 · N8407K · Substantial damage
  > The loss of engine power in flight due to improper overhaul of the carburetor float assembly fulcrum screw, shutting off fuel flow to the engine.
- [NTSB DEN91LA077](https://openairdocs.org/ntsb/DEN91LA077.md): Grumman G-164A · Ville Platte, LA · Accident · Serious injuries · Limited investigation · Final report · May 27, 1991 · N48383 · Substantial damage
  > Premature pull up from an aerial application swath run resulting in a collision with an electrical transmission line.
- [NTSB ANC91LA061](https://openairdocs.org/ntsb/ANC91LA061.md): Rockwell S-2R · Larsen Bay, AK · Accident · 1 fatal · Limited investigation · Final report · May 25, 1991 · N4851X · Destroyed
  > The pilot's decision to continue VFR into IMC conditions and failure to maintain proper altitude. Contributing to the accident was the low ceiling and fog.
- [NTSB FTW91DPG06](https://openairdocs.org/ntsb/FTW91DPG06.md): Grumman G-164A · Gillett, AR · Accident · No injuries · Final report · May 14, 1991 · N9785 · Substantial damage
  > The windshiled becoming obscured by aerial application spray and the resultant limited vision from the cockpit.
- [NTSB FTW91LA076](https://openairdocs.org/ntsb/FTW91LA076.md): Grumman G-164 · Pioneer, LA · Accident · No injuries · Limited investigation · Final report · May 3, 1991 · N7361 · Substantial damage
  > The pilot's use of a runway unsuitable due to recent rains.
- [NTSB MIA91LA101](https://openairdocs.org/ntsb/MIA91LA101.md): Air Tractor AT-401 · Avon, MS · Accident · Serious injuries · Limited investigation · Final report · Mar 15, 1991 · N73135 · Substantial damage
  > Loss of engine power for undetermined reasons during a turn while on an aerial application flight. Contributing to the accident was failure of the left magneto due to failure of a phenolic gear which drives the rotating magnet.
- [NTSB FTW91DPG02](https://openairdocs.org/ntsb/FTW91DPG02.md): Grumman G-164A · Light, AR · Accident · No injuries · Final report · Feb 23, 1991 · N7493 · Substantial damage
  > The pilot's selection of the downwind runway for landing. A factor was the tailwind.
- [NTSB LAX91LA109](https://openairdocs.org/ntsb/LAX91LA109.md): Rockwell S2R-600 · Corcoran, CA · Accident · No injuries · Limited investigation · Final report · Feb 18, 1991 · N4930X · Substantial damage
  > Failure of the aircraft engine's fuel pump valve assembly bypass.
- [NTSB ATL91LA059](https://openairdocs.org/ntsb/ATL91LA059.md): Air Tractor AT-301 · Pavo, GA · Accident · No injuries · Limited investigation · Final report · Feb 18, 1991 · N8770S · Substantial damage
  > The failure of the no. 2 exhaust valve and cylinder head, which resulted in a total loss of engine power. A factor in the accident was the collision with a road sign during the forced landing.
- [NTSB ANC91LA022](https://openairdocs.org/ntsb/ANC91LA022.md): De Havilland DHC-3 · Nome, AK · Accident · Serious injuries · Limited investigation · Final report · Jan 28, 1991 · N212NY · Substantial damage
  > The failure of the 1, 2, 6, 7, 8 and 9 piston linkrods which were broken at the master rod attach end. Contributing to the accident was the rough, uneven terrain.
- [NTSB MIA91LA033](https://openairdocs.org/ntsb/MIA91LA033.md): Air Tractor AT401 · Belle Glade, FL · Accident · Minor injuries · Limited investigation · Final report · Nov 26, 1990 · N1005J · Destroyed
  > The pilot failed to maintain airspeed, and stalled the airplane, resulting in a uncontrolled descent, and collision with the terrain.
- [NTSB ANC90LA184](https://openairdocs.org/ntsb/ANC90LA184.md): De Havilland DHC-3 · King Salmon, AK · Accident · No injuries · Limited investigation · Final report · Sep 23, 1990 · N5322G · Substantial damage
  > The pilot-in-command's failure to maintain airplane control during the takeoff roll, and failure of not attaining airspeed on takeoff.
- [NTSB FTW90DRA09](https://openairdocs.org/ntsb/FTW90DRA09.md): Grumman G-164A · Altair, TX · Accident · No injuries · Final report · Sep 14, 1990 · N6566 · Destroyed
  > The pilot's use of improper terrain for takeoff.
- [NTSB NYC90DFJ04](https://openairdocs.org/ntsb/NYC90DFJ04.md): Schweizer Grumman G-164A · Wayland, NY · Accident · No injuries · Final report · Aug 30, 1990 · N48395 · Substantial damage
  > A cracked engine cylinder assembly, which resulted in loss of engine power.
- [NTSB FTW90DPG13](https://openairdocs.org/ntsb/FTW90DPG13.md): Grumman G-164A · Luxora, AR · Accident · No injuries · Final report · Aug 30, 1990 · N5213 · Substantial damage
  > A partial power loss due to failure of the number five connecting rod. A factor was the soft terrain in which the forced landing was made.
- [NTSB FTW90DPG08](https://openairdocs.org/ntsb/FTW90DPG08.md): Air Tractor AT-301 · Corning, AR · Accident · Serious injuries · Final report · Aug 14, 1990 · N4433S · Substantial damage
  > Blockage of the carburetor Air intake by a collapsed Air induction hose due to improper maintenance by an unknown party.
- [NTSB ATL90FA158](https://openairdocs.org/ntsb/ATL90FA158.md): North American T-6G · Locust Grove, GA · Accident · 2 fatal · Field investigation · Final report · Aug 11, 1990 · N9871C · Destroyed
  > The pilot-in-command's failure to maintain aircraft control during maneuvering flight, allowing the airplane to stall without sufficient altitude for recovery.
- [NTSB LAX90DXQ03](https://openairdocs.org/ntsb/LAX90DXQ03.md): Air Tractor AT-401 · Tule Lake, CA · Accident · Minor injuries · Final report · Aug 4, 1990 · N45116 · Substantial damage
  > An engine failure due to mechanical failure of the distributor.
- [NTSB FTW90DPG04](https://openairdocs.org/ntsb/FTW90DPG04.md): Air Tractor 301A · Foreman, AR · Accident · No injuries · Final report · Jul 30, 1990 · N31631 · Destroyed
  > The pilot's inadvertent stall/mush.
- [NTSB LAX90DVA07](https://openairdocs.org/ntsb/LAX90DVA07.md): Air Tractor AT-401 · San Joaquin, CA · Accident · 1 fatal · Final report · Jul 26, 1990 · N7315S · Substantial damage
  > The failure of the no. 4 cylinder head.
- [NTSB SEA90LA140](https://openairdocs.org/ntsb/SEA90LA140.md): Rockwell S2R · Royal City, WA · Accident · No injuries · Limited investigation · Final report · Jul 15, 1990 · N8468V · Substantial damage
  > The pilot's failure to ensure an adequate supply of fuel, which resulted in fuel exhaustion.
- [NTSB MKC90LA147](https://openairdocs.org/ntsb/MKC90LA147.md): Grumman G-164A · Egypt, AR · Accident · No injuries · Limited investigation · Final report · Jul 12, 1990 · N8930H · Substantial damage
  > The pilot's failure to maintain directional control. A factor related to the accident was the soft/muddy area on the runway.
- [NTSB FTW90DRG04](https://openairdocs.org/ntsb/FTW90DRG04.md): Air Tractor AT-301 · Mission, TX · Accident · No injuries · Final report · Jul 2, 1990 · N3653W · Substantial damage
  > The pilot's failure to maintain proper clearance above the crops he was spraying. A factor was the tree induced mechanical turbulence encountered during the descending turn.
- [NTSB ANC90LA103](https://openairdocs.org/ntsb/ANC90LA103.md): De Havilland DHC-3 · Beaver Village, AK · Accident · Minor injuries · Limited investigation · Final report · Jun 30, 1990 · N17689 · Substantial damage
  > Mechanical failure of an exhaust rocker arm.
- [NTSB CHI90DEE07](https://openairdocs.org/ntsb/CHI90DEE07.md): Schweizer G-164B · Deer Grove, IL · Accident · Minor injuries · Final report · Jun 26, 1990 · N8483K · Substantial damage
  > The pilot's inadequate visual lookout, resulting in collision with a power line.
- [NTSB SEA90LA105](https://openairdocs.org/ntsb/SEA90LA105.md): Air Tractor AT-401 · Jerome, ID · Accident · No injuries · Limited investigation · Final report · Jun 21, 1990 · N4530N · Substantial damage
  > The pilot did not maintain a proper altitude while maneuvering to reverse direction.
- [NTSB SEA90LA103](https://openairdocs.org/ntsb/SEA90LA103.md): Grumman G-164A · Tekoa, WA · Accident · No injuries · Limited investigation · Final report · Jun 21, 1990 · N29SK · Destroyed
  > Failure of the pilot to maintain clearance between the airplane and tall grass adjacent to the gravel strip.
- [NTSB MKC90LA129](https://openairdocs.org/ntsb/MKC90LA129.md): Rockwell S2R · Tilton, AR · Accident · No injuries · Limited investigation · Final report · Jun 15, 1990 · N8421V · Substantial damage
  > Failure of the engine blower(supercharger). Related to the accident was the soft/wet terrain, where the forced landing was performed.
- [NTSB MKC90LA128](https://openairdocs.org/ntsb/MKC90LA128.md): Air Tractor AT-301 · Ulysses, KS · Accident · No injuries · Limited investigation · Final report · Jun 15, 1990 · N3650Z · Substantial damage
  > Failure of the powerplant cylinder and stall/mush encountered by the pilot in command.
- [NTSB FTW90DPA07](https://openairdocs.org/ntsb/FTW90DPA07.md): Ayres S2R · Mcgregor, TX · Accident · No injuries · Final report · Jun 15, 1990 · N8472V · Substantial damage
  > The fuel exhaustion induced power loss, which resulted from the pilot's inaccurate fuel consumption calculations.
- [NTSB LAX90DVA04](https://openairdocs.org/ntsb/LAX90DVA04.md): Grumman-Schweizer G-164B · Buttonwillow, CA · Accident · Serious injuries · Final report · Jun 8, 1990 · N6725K · Destroyed
  > Failure of the #7 cylinder due to a pre-existing crack. The terrain condition was a related factor.
- [NTSB FTW90DRA05](https://openairdocs.org/ntsb/FTW90DRA05.md): Grumman 164-B · Garwood, TX · Accident · No injuries · Final report · May 25, 1990 · N9982 · Destroyed
  > The power loss due to super charger impeller failure.
- [NTSB LAX90DVG07](https://openairdocs.org/ntsb/LAX90DVG07.md): Grumman G-164A · Gridley, CA · Accident · Serious injuries · Final report · May 8, 1990 · N5368 · Substantial damage
  > Failure of the no.7 cylinder head which led to a forced landing and substantial damage to the aircraft when it nosed over after colliding with a ditch.
- [NTSB FTW90DRD07](https://openairdocs.org/ntsb/FTW90DRD07.md): Grumman G-164A · Ville Platte, LA · Accident · No injuries · Final report · May 2, 1990 · N8938H · Destroyed
  > Partial loss of engine power due to a cracked number four cylinder intake rocker box housing. The lack of a suitable forced landing site was a related factor.
- [NTSB FTW90DRA04](https://openairdocs.org/ntsb/FTW90DRA04.md): Grumman 164A · Garwood, TX · Accident · No injuries · Final report · Apr 20, 1990 · N5295 · Substantial damage
  > Failure of the number 8 cylinder.
- [NTSB LAX90DUG05](https://openairdocs.org/ntsb/LAX90DUG05.md): Grumman G-164B · Blythe, CA · Accident · 1 fatal · Final report · Apr 19, 1990 · N6708K · 2 aircraft · Destroyed
  > Failure of the pilots of N6708K and N10222 to maintain adequate visual lookout and failure of the pilot of N6708K to follow a prearanged procedure for reversing the direction of flight.
- [NTSB ATL90DLT01](https://openairdocs.org/ntsb/ATL90DLT01.md): Grumman G-164B · Tiptonville, TN · Accident · No injuries · Final report · Apr 16, 1990 · N6683K · Substantial damage
  > A loss of engine power for undetermined reasons. A factor in the accident was the rough terrain.
- [NTSB MKC90LA081](https://openairdocs.org/ntsb/MKC90LA081.md): Air Tractor AT-401 · Hornersville, MO · Accident · No injuries · Limited investigation · Final report · Apr 5, 1990 · N1015A · Substantial damage
  > Failure of an engine cylinder.
- [NTSB MKC90LA080](https://openairdocs.org/ntsb/MKC90LA080.md): Grumman G-164A · Mounds, AR · Accident · No injuries · Limited investigation · Final report · Apr 4, 1990 · N6556 · Substantial damage
  > The pilot's improper compensation for wind conditions. Factors related to the accident were: the pilot's selection of the wrong runway and the resultant tailwind condition.
- [NTSB MKC90LA079](https://openairdocs.org/ntsb/MKC90LA079.md): Rockwell S-2R · Des Arc, AR · Accident · No injuries · Limited investigation · Final report · Apr 3, 1990 · N4183X · Substantial damage
  > Failure of the engine fuel pump.
- [NTSB FTW90DRD04](https://openairdocs.org/ntsb/FTW90DRD04.md): Grumman G-164B · Fenton, LA · Accident · No injuries · Final report · Apr 3, 1990 · N6714K · Destroyed
  > Failure of the elevator control rod end bearing.
- [NTSB MKC90LA076](https://openairdocs.org/ntsb/MKC90LA076.md): Grumman G-164B · Newport, AR · Accident · No injuries · Limited investigation · Final report · Mar 28, 1990 · N3630U · Substantial damage
  > Failure of the pilot to maintain proper runway alignment, which resulted in an encounter with soft/wet (muddy) terrain and a subsequent nose over of the aircraft.
- [NTSB DEN90LA061](https://openairdocs.org/ntsb/DEN90LA061.md): North American T-6G · Englewood, CO · Accident · No injuries · Limited investigation · Final report · Mar 11, 1990 · N2879G · Substantial damage
  > To be a failure of the pilot to maintain directional control.
- [NTSB ATL90LA078](https://openairdocs.org/ntsb/ATL90LA078.md): North American T-6 G · Albany, GA · Accident · No injuries · Limited investigation · Final report · Mar 9, 1990 · N96143 · Substantial damage
  > A locked brake which prevented the pilot from maintaining directional control during the landing roll. The brake material expanded after becoming water soaked while taxiing.
- [NTSB LAX90DVG02](https://openairdocs.org/ntsb/LAX90DVG02.md): Schweizer G-164B · Knights Landing, CA · Accident · No injuries · Final report · Nov 18, 1989 · N6977K · Substantial damage
  > The failure of the right main Landing gear due to a sheared bolt that attached the spring leg to the gear.

Next page: https://openairdocs.org/ntsb.md?engine=52016&page=17

## 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 ('52016'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=52016&page=16

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