# NTSB investigations: Pratt & Whitney R1340 series, CA

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 1 of 6 · 279 cases

## Latest cases

- [NTSB WPR25LA158](https://openairdocs.org/ntsb/WPR25LA158.md): Schweizer G-164B · Butte City, CA · Accident · Minor injuries · Class 4 · Limited · Final report · May 9, 2025 · N7503L · Substantial damage
  > The pilot’s use of engine beta prior to ensuring the tailwheel was on the ground during landing roll.
- [NTSB WPR24LA282](https://openairdocs.org/ntsb/WPR24LA282.md): Grumman Acft ENG Cor-Schweizer G-164B · Durham, CA · Accident · Serious injuries · Class 4 · Limited · Final report · Aug 13, 2024 · N6633K · Substantial damage
  > The pilot’s failure to maintain clearance from powerlines, which resulted in a wire strike.
- [NTSB WPR24LA214](https://openairdocs.org/ntsb/WPR24LA214.md): Grumman Acft ENG Cor-Schweizer G-164B · Pleasant Grove, CA · Accident · No injuries · Class 3 · Limited · Final report · Jun 25, 2024 · N6793K · Substantial damage
  > The pilot’s delayed recognition of the extent of the airplane’s increased takeoff roll. Contributing to the accident was the pilot’s lack of experience operating the airplane at a high gross weight.
- [NTSB WPR24LA167](https://openairdocs.org/ntsb/WPR24LA167.md): Canadian Car & Foundry Harvard MK IV · Modesto, CA · Accident · Minor injuries · Class 4 · Limited · Final report · Jun 2, 2024 · N7522U · Substantial damage
  > The pilot’s improper fuel tank selection, which resulted in a total loss of engine power due to fuel starvation. Contributing to the accident was a malfunctioning fuel selector at low fuel levels.
- [NTSB ANC24FA038](https://openairdocs.org/ntsb/ANC24FA038.md): Schweizer G-164B · Richvale, CA · Accident · 1 fatal · Class 3 · Field · Final report · May 28, 2024 · N3629Y · Substantial damage
  > The pilot’s failure to maintain clearance from a trailer located on the edge of the runway during takeoff. Contributing to the accident was the location of the trailer on the side of the runway.
- [NTSB WPR23LA305](https://openairdocs.org/ntsb/WPR23LA305.md): Grumman Acft ENG Cor-Schweizer G-164A · Davis, CA · Accident · 1 fatal · Class 3 · Limited · Final report · Aug 6, 2023 · N5450 · Substantial damage
  > An inflight loss of control during a low altitude operation for undetermined reasons.
- [NTSB WPR23FA122](https://openairdocs.org/ntsb/WPR23FA122.md): Rockwell International S-2R · Willows, CA · Accident · 1 fatal · Class 3 · Field · Final report · Mar 8, 2023 · N8424V · Substantial damage
  > The pilot’s failure to maintain clearance from powerlines while flying under multiple conductors during a low-altitude aerial application flight, which resulted in propeller contact with a powerline and a subsequent loss of control.
- [NTSB WPR22FA026](https://openairdocs.org/ntsb/WPR22FA026.md): Ayres S-2R · Shafter, CA · Accident · 1 fatal · Class 3 · Field · Final report · Nov 3, 2021 · N8960Q · Substantial damage
  > The pilot’s decision to depart into instrument meteorological conditions, which resulted in spatial disorientation and a subsequent loss of airplane control.
- [NTSB WPR21LA299](https://openairdocs.org/ntsb/WPR21LA299.md): Schweizer G-164B · Tracy, CA · Accident · No injuries · Class 3 · Limited · Final report · Jul 30, 2021 · N3629F · Substantial damage
  > A loss of thrust during a low-level agricultural application flight, which resulted in a descent and impact with terrain. The reason for the loss of thrust could not be determined based on available information.
- [NTSB WPR21LA200](https://openairdocs.org/ntsb/WPR21LA200.md): Grumman Acft ENG Cor-Schweizer G-164C · Glenn, CA · Accident · Serious injuries · Class 3 · Limited · Final report · May 12, 2021 · N6596K · Substantial damage
  > The pilot’s fuel mismanagement, which resulted in fuel exhaustion, a total loss of engine power, and an off-airport hard landing.
- [NTSB WPR20LA175](https://openairdocs.org/ntsb/WPR20LA175.md): Grumman G164 · Lincoln, CA · Accident · Minor injuries · Class 3 · Limited · Final report · Jun 4, 2020 · N8486K · Substantial damage
  > The pilot’s loss of directional control on takeoff for undetermined reasons.
- [NTSB WPR20CA159](https://openairdocs.org/ntsb/WPR20CA159.md): Grumman G164 · Maxwell, CA · Accident · No injuries · Class 4 · Data collection · Final report · May 29, 2020 · N9716 · Substantial damage
  > The pilot's delayed decision to abort the takeoff when the airplane was not attaining sufficient airspeed for takeoff and subsequently departed the end of the runway and collided with terrain. Contributing to the accident was the pilot's inadequate preflight…
- [NTSB GAA19CA493](https://openairdocs.org/ntsb/GAA19CA493.md): North American AT 6D · Chino, CA · Accident · No injuries · Data collection · Final report · Aug 10, 2019 · N6432D · Substantial damage
  > The pilot's improper landing flare, which resulted in a bounced landing, and his subsequent exceedance of the airplane's critical angle of attack, which resulted in an aerodynamic stall.
- [NTSB WPR19FA145](https://openairdocs.org/ntsb/WPR19FA145.md): Grumman G164 · Pleasant Grove, CA · Accident · 2 fatal · Class 3 · Field · Final report · May 15, 2019 · N6787K · 2 aircraft · Substantial damage
  > The failure of both pilots to see and avoid the other airplane, which resulted in a midair collision.
- [NTSB WPR19LA137](https://openairdocs.org/ntsb/WPR19LA137.md): Grumman G164 · Sutter, CA · Accident · No injuries · Class 3 · Limited · Final report · May 5, 2019 · N3630D · Substantial damage
  > A loss of engine power due to the in-flight separation of the fuel control unit interconnect rod for reasons that could not be determined due to lack of available evidence.
- [NTSB GAA19CA207](https://openairdocs.org/ntsb/GAA19CA207.md): North American SNJ · Chino, CA · Accident · No injuries · Data collection · Final report · Apr 13, 2019 · N3375G · 2 aircraft · Substantial damage
  > The other pilot's failure to maintain clearance from a stopped airplane while taxiing.
- [NTSB WPR19LA014](https://openairdocs.org/ntsb/WPR19LA014.md): North American SNJ · Agoura Hills, CA · Accident · No injuries · Class 3 · Limited · Final report · Oct 23, 2018 · N7969C · Destroyed
  > The failure of the No. 5 piston rod end due to fatigue, which resulted in a total loss of engine power.
- [NTSB WPR18LA189](https://openairdocs.org/ntsb/WPR18LA189.md): Grumman G164B · Colusa, CA · Accident · No injuries · Class 3 · Limited · Final report · Jul 9, 2018 · N6696K · Substantial damage
  > Total loss of engine power for reasons that could not be determined based on the available information.
- [NTSB WPR18LA128](https://openairdocs.org/ntsb/WPR18LA128.md): Grumman Acft ENG Cor-Schweizer G 164C · Maxwell, CA · Accident · No injuries · Class 3 · Limited · Final report · Apr 29, 2018 · N6674K · Substantial damage
  > A total loss of engine power due to an uncommanded closing of the fuel shutoff valve, which terminated fuel to the engine. The reason for the fuel shutoff valve’s closure could not be determined based on the available information.
- [NTSB WPR18LA015](https://openairdocs.org/ntsb/WPR18LA015.md): Schweizer G 164B · Tracy, CA · Accident · No injuries · Limited investigation · Final report · Oct 24, 2017 · N8494K · Substantial damage
  > The pilot's failure to maintain directional control of the airplane during the landing roll.
- [NTSB WPR17LA174](https://openairdocs.org/ntsb/WPR17LA174.md): Rockwell International S 2R · Brawley, CA · Accident · No injuries · Limited investigation · Final report · Aug 1, 2017 · N4913X · Substantial damage
  > The partial loss of engine power due to the overstress separation of three supercharger drive gear teeth.
- [NTSB GAA17CA321](https://openairdocs.org/ntsb/GAA17CA321.md): Ag-Cat G 164 · Tulelake, CA · Accident · No injuries · Data collection · Final report · Jun 5, 2017 · N80083 · Substantial damage
  > The pilot’s improper decision to perform a low altitude fly-by over ground equipment, which resulted in the airplane striking the equipment.
- [NTSB GAA17CA305](https://openairdocs.org/ntsb/GAA17CA305.md): Grumman Acft ENG Cor-Schweizer G-164 · Maxwell, CA · Accident · Serious injuries · Data collection · Final report · May 26, 2017 · N6674K · Substantial damage
  > The pilot's failure to visually check the fuel quantity during the preflight inspection and ensure that sufficient fuel was onboard for the flight, which resulted in a total loss of engine power due to fuel exhaustion.
- [NTSB GAA17CA242](https://openairdocs.org/ntsb/GAA17CA242.md): North American SNJ · Van Nuys, CA · Accident · No injuries · Data collection · Final report · Apr 20, 2017 · N7969C · Substantial damage
  > The pilot’s failure to maintain directional control of the airplane during the landing roll with a quartering tailwind.
- [NTSB GAA16CA464](https://openairdocs.org/ntsb/GAA16CA464.md): North American SNJ · Perris, CA · Accident · No injuries · Data collection · Final report · Sep 3, 2016 · N7296C · Substantial damage
  > The pilot's inability to compensate for a dust devil during an aborted landing, which resulted in the left wing contacting the ground, a runway excursion, and the airplane coming to rest in a nose-down attitude.
- [NTSB WPR16LA137](https://openairdocs.org/ntsb/WPR16LA137.md): Rockwell International S 2R · Brawley, CA · Accident · No injuries · Limited investigation · Final report · Jun 29, 2016 · N4952X · Substantial damage
  > The airplane’s inability to climb and subsequent impact with terrain for reasons that could not be determined based on the available information.
- [NTSB WPR15LA194](https://openairdocs.org/ntsb/WPR15LA194.md): Grumman Acft ENG Cor-Schweizer G 164A · Five Points, CA · Accident · Minor injuries · Limited investigation · Final report · Jun 21, 2015 · N8598H · Substantial damage
  > Maintenance personnel’s improper reassembly of the engine during overhaul, which led to the failure of the supercharger-blower due to a lack of lubrication and the subsequent total loss of engine power during takeoff.
- [NTSB GAA15CA113](https://openairdocs.org/ntsb/GAA15CA113.md): Grumman Acft ENG Cor-Schweizer G 164A · Bakersfield, CA · Accident · No injuries · Data collection · Final report · Jun 9, 2015 · N8372 · Substantial damage
  > The pilot's failure to maintain directional control during the landing roll, resulting in a runway excursion, and a collision with terrain.
- [NTSB WPR15LA160](https://openairdocs.org/ntsb/WPR15LA160.md): Grumman Acft ENG Cor-Schweizer G 164A · Maxwell, CA · Accident · No injuries · Limited investigation · Final report · May 13, 2015 · N8875H · Substantial damage
  > The pilot’s improper preflight inspection and fuel planning, which resulted in a total loss of engine power due to fuel exhaustion.
- [NTSB WPR14LA322](https://openairdocs.org/ntsb/WPR14LA322.md): Schweizer G 164B · Tulelake, CA · Accident · 1 fatal · Limited investigation · Final report · Aug 1, 2014 · N3627R · Destroyed
  > The pilot's failure to maintain clearance from power lines while maneuvering during low-altitude operations.
- [NTSB WPR14LA201](https://openairdocs.org/ntsb/WPR14LA201.md): Schweizer G 164B · Biggs, CA · Accident · No injuries · Limited investigation · Final report · May 13, 2014 · N3633C · Substantial damage
  > The assembler’s improper fabrication of a fuel line (hose) and the subsequent failure to verify that it was not occluded, which resulted in fuel starvation and a total loss of engine power during takeoff.
- [NTSB WPR13LA223](https://openairdocs.org/ntsb/WPR13LA223.md): Schweizer G-164B · Biggs, CA · Accident · 1 fatal · Limited investigation · Final report · May 9, 2013 · N8214S · Minor damage
  > The pilot’s failure to adequately monitor the runway environment during taxi, which resulted in an on-ground collision.
- [NTSB WPR12CA403](https://openairdocs.org/ntsb/WPR12CA403.md): Ayres S2R-R1340 · Brawley, CA · Accident · Minor injuries · Data collection · Final report · Sep 7, 2012 · N4020A · Substantial damage
  > The pilot's decision to attempt to takeoff in high temperatures with a tailwind. Contributing to the accident was the sun glare.
- [NTSB WPR12LA233](https://openairdocs.org/ntsb/WPR12LA233.md): Grumman Acft ENG Cor-Schweizer G-164A · Wilton, CA · Accident · No injuries · Limited investigation · Final report · May 27, 2012 · N8380 · Substantial damage
  > The failure of the hopper gate mechanism and subsequent sulfur fire during a low-level maneuver.
- [NTSB WPR11LA320](https://openairdocs.org/ntsb/WPR11LA320.md): Schweizer G-164B · Yuba City, CA · Accident · No injuries · Limited investigation · Final report · Jul 9, 2011 · N7503L · Substantial damage
  > High-cycle fatigue on the 1st-stage compressor blade retaining ring, which resulted in the ring’s fracture and a subsequent loss of engine power.
- [NTSB WPR11LA279](https://openairdocs.org/ntsb/WPR11LA279.md): Rockwell International S-2R · Brawley, CA · Accident · Serious injuries · Limited investigation · Final report · Jun 23, 2011 · N8520V · Substantial damage
  > The partial loss of engine power shortly after takeoff, which likely resulted from the failure of the piston connecting rod in cylinder number 3 due to hydraulic lock in that cylinder.
- [NTSB WPR11LA273](https://openairdocs.org/ntsb/WPR11LA273.md): Schweizer G-164B · Marysville, CA · Accident · No injuries · Limited investigation · Final report · Jun 21, 2011 · N3627G · Substantial damage
  > The separation of the right main landing gear during takeoff, due to fatigue.
- [NTSB WPR11CA198](https://openairdocs.org/ntsb/WPR11CA198.md): Grumman G-164 · Princeton, CA · Accident · No injuries · Data collection · Final report · May 4, 2011 · N716Y · Substantial damage
  > The pilot’s failure to maintain adequate airspeed while maneuvering, resulting in an aerodynamic stall and collision with terrain.
- [NTSB WPR11CA128](https://openairdocs.org/ntsb/WPR11CA128.md): Schweizer G-164B · Buttonwillow, CA · Accident · No injuries · Data collection · Final report · Feb 5, 2011 · N6725K · Substantial damage
  > The pilot's failure to maintain clearance from an irrigation vent pipe.
- [NTSB WPR10LA396](https://openairdocs.org/ntsb/WPR10LA396.md): Grumman G164 · Tracy, CA · Accident · No injuries · Limited investigation · Final report · Aug 11, 2010 · N6781K · Substantial damage
  > A total loss of engine power while maneuvering due to an internal catastrophic failure to the master rod and piston connecting rod links.
- [NTSB WPR10LA253](https://openairdocs.org/ntsb/WPR10LA253.md): Schweizer G-164B · Robbins, CA · Accident · Serious injuries · Limited investigation · Final report · May 21, 2010 · N3633C · Substantial damage
  > The failure of the wheel hub flange, which allowed the over size tire to expand and impinge on the brake disc and caliper, which resulted in a loss of control during the landing.
- [NTSB WPR10LA214](https://openairdocs.org/ntsb/WPR10LA214.md): Grumman Acft ENG Cor-Schweizer G-164A · Madera, CA · Accident · No injuries · Limited investigation · Final report · Apr 23, 2010 · N4450 · Substantial damage
  > A loss of engine power for undetermined reasons.
- [NTSB WPR10FA162](https://openairdocs.org/ntsb/WPR10FA162.md): North American AT6 · Bakersfield, CA · Accident · 2 fatal · Field investigation · Final report · Mar 17, 2010 · N75AG · Substantial damage
  > The pilots did not maintain clearance from terrain for undetermined reasons.
- [NTSB WPR10LA125](https://openairdocs.org/ntsb/WPR10LA125.md): Schweizer G164B · Byron, CA · Accident · No injuries · Limited investigation · Final report · Feb 23, 2010 · N8494K · Substantial damage
  > A loss of engine power due to carburetor icing as a result of the pilot's failure to use carburetor heat.
- [NTSB WPR09LA374](https://openairdocs.org/ntsb/WPR09LA374.md): Air Tractor AT-301 · Firebaugh, CA · Accident · No injuries · Limited investigation · Final report · Jul 29, 2009 · N23189 · Substantial damage
  > A total loss of engine power due to fuel exhaustion that was due to the failure of company ground personnel to refuel the airplane. Contributing to the accident was unsuitable terrain for a forced landing.
- [NTSB WPR09LA228](https://openairdocs.org/ntsb/WPR09LA228.md): Ayres S2R-T34 · Marysville, CA · Accident · Serious injuries · Limited investigation · Final report · May 6, 2009 · N40208 · 2 aircraft · Substantial damage
  > The failure of both pilots to see and avoid the other airplane while making their final approach for landing.
- [NTSB WPR09CA114](https://openairdocs.org/ntsb/WPR09CA114.md): Schweizer G-164B · Buttonwillow, CA · Accident · No injuries · Data collection · Final report · Feb 12, 2009 · N3626T · Substantial damage
  > A loss of engine power due to the number four cylinder base nuts becoming loose, allowing the cylinder to detach from the engine case. Contributing to the accident was the pilot's impaired visibility due to smoke during the forced landing.
- [NTSB SEA08LA133](https://openairdocs.org/ntsb/SEA08LA133.md): Thrush S-2R · Holtville, CA · Accident · Minor injuries · Limited investigation · Final report · May 11, 2008 · N8860Q · Substantial damage
  > The loss of oil pressure for undetermined reasons.
- [NTSB LAX08LA137](https://openairdocs.org/ntsb/LAX08LA137.md): Grumman G-164 · Butte City, CA · Accident · No injuries · Limited investigation · Final report · May 6, 2008 · N703Y · Substantial damage
  > A total loss of engine power during takeoff due to fuel exhaustion as a result of the pilot's failure to verify the fuel quantity prior to flight.
- [NTSB LAX08CA034](https://openairdocs.org/ntsb/LAX08CA034.md): Air Tractor AT-401 · Soledad, CA · Accident · Serious injuries · Data collection · Final report · Dec 6, 2007 · N6024M · Destroyed
  > The pilot's failure to maintain an adequate clearance from mountainous terrain while maneuvering during an aerial application mission. Contributing to the accident was the pilot's diverted attention inside the cockpit.

Next page: https://openairdocs.org/ntsb.md?engine=52016&state=CA&page=2

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

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

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