# NTSB investigations: Pratt & Whitney PT6A 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 12 of 13 · 650 cases

## Cases, newest first

- [NTSB DEN99TA013](https://openairdocs.org/ntsb/DEN99TA013.md): Air Tractor AT-400 · Aztec, NM · Accident · No injuries · Final report · Oct 19, 1998 · N73080 · Substantial damage
  > The pilot's inadequate preflight inspection of the airplane. Factors were the unsecured oil dipstick, the loss of engine oil pressure necessitating a precautionary landing on unsuitable terrain, and the collision with the tree.
- [NTSB ATL99LA009](https://openairdocs.org/ntsb/ATL99LA009.md): Air Tractor AT502B · Bainbridge, GA · Accident · Serious injuries · Limited investigation · Final report · Oct 12, 1998 · N6037N · Destroyed
  > The pilot's inadequate visual lookout which resulted in a collision with an irrigation unit located in the field.
- [NTSB FTW99LA005](https://openairdocs.org/ntsb/FTW99LA005.md): Air Tractor AT-502B · Ringling, OK · Accident · No injuries · Limited investigation · Final report · Oct 8, 1998 · N502S · Substantial damage
  > The pilot's failure to maintain obstacle clearance. A factor was the sun glare which impaired the pilot's vision.
- [NTSB FTW98LA383](https://openairdocs.org/ntsb/FTW98LA383.md): Air Tractor AT-502B · Portales, NM · Accident · Minor injuries · Limited investigation · Final report · Sep 2, 1998 · N50620 · Destroyed
  > The pilot's failure to maintain adequate altitude/clearance during an aerial application. Also causal was the inadvertent ground loop/swerve during the landing.
- [NTSB MIA98LA202](https://openairdocs.org/ntsb/MIA98LA202.md): Air Tractor 502 · Clewiston, FL · Accident · No injuries · Limited investigation · Final report · Jul 17, 1998 · N9184R · Substantial damage
  > The pilot's failure to attain adequate airspeed. A tailwind was a contributing factor.
- [NTSB CHI98LA243](https://openairdocs.org/ntsb/CHI98LA243.md): Air Tractor AT-502 · Minto, ND · Accident · Minor injuries · Limited investigation · Final report · Jul 9, 1998 · N9185C · Substantial damage
  > the pilot's selection of unsuitable terrain for takeoff. Factors were wet and soft runway conditions, and a ditch and the end of the overrun area.
- [NTSB MIA98LA178](https://openairdocs.org/ntsb/MIA98LA178.md): Air Tractor 502 · Clarksdale, MS · Accident · No injuries · Limited investigation · Final report · Jun 4, 1998 · N1502U · Substantial damage
  > The pilot's failure to extend the flaps for takeoff. A factor was his diverted attention to the loading of the airplane.
- [NTSB FTW98LA205](https://openairdocs.org/ntsb/FTW98LA205.md): Air Tractor AT-402 · Forrest City, AR · Accident · No injuries · Limited investigation · Final report · May 7, 1998 · N91660 · Substantial damage
  > The pilot's failure to maintain clearance with terrain. Factors were the sunglare and the pilot's restriction to visibility due to chemicals on the windshield.
- [NTSB FTW98LA140](https://openairdocs.org/ntsb/FTW98LA140.md): Air Tractor AT-502B · Lake Village, AR · Accident · Minor injuries · Limited investigation · Final report · Mar 3, 1998 · N60762 · Substantial damage
  > The pilot's use of unsuitable terrain for takeoff. A factor was the rough/uneven terrain.
- [NTSB CHI98LA084](https://openairdocs.org/ntsb/CHI98LA084.md): Cessna 208B · Grand Island, NE · Accident · No injuries · Limited investigation · Final report · Jan 20, 1998 · N738FX · Substantial damage
  > ice build-up on the airplane's wings and empennage which led to an inadvertent stall and hard landing. Factors contributing to this accident were the pilot's inadvertent flight into icing conditions, and the icing conditions.
- [NTSB FTW98FA100](https://openairdocs.org/ntsb/FTW98FA100.md): Air Tractor 502B · Eudora, AR · Accident · 1 fatal · Field investigation · Final report · Jan 16, 1998 · N6093U · Destroyed
  > The pilot's failure to maintain adequate airspeed while attempting an aerobatic manuever
- [NTSB NYC98LA050](https://openairdocs.org/ntsb/NYC98LA050.md): Beech 1900D · Windsor Locks, CT · Accident · No injuries · Limited investigation · Final report · Dec 23, 1997 · N140ZV · Substantial damage
  > The inadequate snow removal by airport personnel. Contributing factors were the snowbank and whiteout conditions.
- [NTSB FTW98LA035](https://openairdocs.org/ntsb/FTW98LA035.md): Pilatus PC-6 · Lexington, TX · Accident · No injuries · Limited investigation · Final report · Oct 28, 1997 · N19TX · Substantial damage
  > the pilot's selection of an unsuitable landing area. A factor relating to the accident was: the uneven terrain (with swales) at the edge of the landing area.
- [NTSB ANC98IA004](https://openairdocs.org/ntsb/ANC98IA004.md): Cessna 208B · Kasigluk, AK · Incident · No injuries · Incident investigation · Final report · Oct 20, 1997 · N9304F · No damage
  > inadequate inspection of the aileron by company maintenance personnel, and the pilot's inadequate preflight inspection of the aileron, which led to the jamming of the left aileron due to loose balance weight retaining screws.
- [NTSB NYC98LA013](https://openairdocs.org/ntsb/NYC98LA013.md): Beech 1900D · Pittsburgh, PA · Accident · Minor injuries · Limited investigation · Final report · Oct 15, 1997 · N162ZV · Substantial damage
  > the tug driver's failure to obey a stop sign and his failure to yield right-of-way to the airplane.
- [NTSB LAX98FA013](https://openairdocs.org/ntsb/LAX98FA013.md): Beech 99-C99 · Meadview, AZ · Accident · No injuries · Field investigation · Final report · Oct 15, 1997 · N227AV · Substantial damage
  > The pilot's inadequate in-flight decision, inadequate visual lookout, and his failure to maintain adequate obstacle clearance. Contributing was low altitude flight.
- [NTSB DCA98MA002](https://openairdocs.org/ntsb/DCA98MA002.md): Cessna 208B · Montrose, CO · Accident · 9 fatal · Major investigation · Final report · Oct 8, 1997 · N12022 · Destroyed
  > the pilot's failure to maintain sufficient airspeed for undetermined reasons while maneuvering the airplane near the maximum gross weight and aft cg in or near instrument meteorological conditions, resulting in the loss of control and entry into a stall/spin.…
- [NTSB FTW97LA331](https://openairdocs.org/ntsb/FTW97LA331.md): Air Tractor AT-802A · Pineland, TX · Accident · No injuries · Limited investigation · Final report · Aug 27, 1997 · N9197F · Substantial damage
  > failure of the right main wheel brake, during the landing roll. A factor relating to the accident was: the pilot's failure (or inability) to maintain directional control of the airplane, after loss of right braking action.
- [NTSB FTW97LA329](https://openairdocs.org/ntsb/FTW97LA329.md): Fairchild Heli-Porter PC6/B2-H2 · Gillette, WY · Accident · No injuries · Limited investigation · Final report · Aug 26, 1997 · N354F · Substantial damage
  > Failure by the pilot in command to follow procedures and retrim the stabilizer for landing.
- [NTSB FTW97FA285](https://openairdocs.org/ntsb/FTW97FA285.md): Ayres S2R-T15 · Oakridge, LA · Accident · 1 fatal · Field investigation · Final report · Jul 28, 1997 · N3096K · Destroyed
  > The pilot's failure to maintain clearance for undetermined reasons.
- [NTSB LAX97LA250](https://openairdocs.org/ntsb/LAX97LA250.md): de Havilland DHC-6-300 · Elko, NV · Accident · No injuries · Limited investigation · Final report · Jul 21, 1997 · N776BF · Substantial damage
  > The failure of maintenance personnel to correctly diagnose and correct a reoccurring nose gear steering problem, and the improperly tensioned nose wheel steering actuator cables which provided the pilot with an erroneous cockpit indication that the nose gear…
- [NTSB MIA97LA195](https://openairdocs.org/ntsb/MIA97LA195.md): Air Tractor AT-502 · Tunica, MS · Accident · No injuries · Limited investigation · Final report · Jun 24, 1997 · N45461 · Substantial damage
  > The pilots poor preflight planning preparation for attempting to takeoff with a tailwind and with the hopper loaded 3/4 full during a 93degree F., day at a density altitude of 2,400 feet.
- [NTSB ATL97LA088](https://openairdocs.org/ntsb/ATL97LA088.md): Air Tractor AT-402B · Ridgely, TN · Accident · No injuries · Limited investigation · Final report · Jun 23, 1997 · N6128W · Substantial damage
  > The pilot's inadequate preflight planning in that he failed to account for the high temperature and high density altitude, which resulted in an aerodynamic stall and loss of control. Factors were the tall crops and the ditch.
- [NTSB NYC97IA123](https://openairdocs.org/ntsb/NYC97IA123.md): Beech 1900D · Clarksburg, WV · Incident · No injuries · Incident investigation · Final report · Jun 19, 1997 · N165YV · Minor damage
  > The right outboard flap detaching from the flap aft roller bearings, at the flap track, which was a result of the manufacturer's inadequate inspection program.
- [NTSB FTW97LA225](https://openairdocs.org/ntsb/FTW97LA225.md): Air Tractor AT-502A · Chesterville, TX · Accident · No injuries · Limited investigation · Final report · Jun 13, 1997 · N248LF · Substantial damage
  > an undetermined malfunction/failure of the propeller reversing system.
- [NTSB FTW97LA223](https://openairdocs.org/ntsb/FTW97LA223.md): Air Tractor AT-400A · Black Oak, AR · Accident · Minor injuries · Limited investigation · Final report · Jun 13, 1997 · N3161J · Destroyed
  > The loss of engine power due to compressor turbine blade failure. A factor was the lack of suitable terrain for the forced landing.
- [NTSB FTW97LA196](https://openairdocs.org/ntsb/FTW97LA196.md): Ayres S2R-T34 · Welsh, LA · Accident · Minor injuries · Limited investigation · Final report · May 22, 1997 · N30982 · Substantial damage
  > The pilot's failure to maintain clearance with a moving vehicle. Factors were: the lack of runway signs and a runway safety area, and the difficulty for the pilot and driver of the vehicle to visually detect each other due to high vegetation at the edge of…
- [NTSB MIA97WA124](https://openairdocs.org/ntsb/MIA97WA124.md): Beech E-90 · Choque, Peru · Accident · No injuries · Foreign investigation · Mar 28, 1997 · N90DA · Substantial damage
- [NTSB FTW97LA140](https://openairdocs.org/ntsb/FTW97LA140.md): Air Tractor AT-502 · Watson, AR · Accident · No injuries · Limited investigation · Final report · Mar 23, 1997 · N9185G · Substantial damage
  > The pilot's failure to attain lift off speed and the ground loop/swerve encountered. Factors were the gravel and soft terrain at the end of the runway.
- [NTSB LAX97LA125](https://openairdocs.org/ntsb/LAX97LA125.md): Cessna 425 · Fresno, CA · Accident · No injuries · Limited investigation · Final report · Mar 17, 1997 · N425TV · Substantial damage
  > failure of the right brake to function, due to the installation mechanic's failure to completely bleed all air from the lines. A factor in the accident was the pilot's decision to fly the unairworthy aircraft before the engine/propeller installation had been…
- [NTSB FTW97LA088](https://openairdocs.org/ntsb/FTW97LA088.md): Beech B90 · Longmont, CO · Accident · Minor injuries · Limited investigation · Final report · Jan 24, 1997 · N76GM · Destroyed
  > Failure of the pilot to refuel the airplane, resulting in fuel exhaustion. Factors were the pilot's reference to similar but different aircraft performance charts, and the operator's failure to provide the pilot with the proper performance charts.
- [NTSB NYC97FA045](https://openairdocs.org/ntsb/NYC97FA045.md): Beech 1900D · Bangor, ME · Accident · Minor injuries · Field investigation · Final report · Jan 10, 1997 · N139ZV · Substantial damage
  > The inadequate flight and winter operations training provided by the operator, and the pilot's improper decision to abort the takeoff while airborne above V1, due to a false stall warning horn. Also casual was the airport operations improper decision to…
- [NTSB MIA97GA059](https://openairdocs.org/ntsb/MIA97GA059.md): Ayres S2RHG-T65 · Guaviare, Colombia · Accident · 1 fatal · Final report · Jan 7, 1997 · N3100U · Destroyed
  > the pilot's failure to maintain adequate altitude/clearance while maneuvering at a low altitude.
- [NTSB FTW97LA074](https://openairdocs.org/ntsb/FTW97LA074.md): Beech C90A · Rio Grande City, TX · Accident · No injuries · Limited investigation · Final report · Jan 2, 1997 · N1552D · Substantial damage
  > The pilot's failure to maintain clearance with the tower. Factors were the low ceilings and the pilot's diverted attention to his navigation.
- [NTSB CHI97IA029](https://openairdocs.org/ntsb/CHI97IA029.md): Beech 1900D · Hopkensville, KY · Incident · No injuries · Incident investigation · Final report · Nov 17, 1996 · N841SK · Minor damage
  > the materials used in the new windshield, to meet new EPA requirements, were inadequate for the design.
- [NTSB MIA97LA012](https://openairdocs.org/ntsb/MIA97LA012.md): Air Tractor 400 · Sylvester, GA · Accident · Minor injuries · Limited investigation · Final report · Oct 21, 1996 · N73080 · Substantial damage
  > Was the pilots intentional disregard for operating the engine contrary to the flight manuals for intentionally exceeding the maximum engine temperature, resulting in creep failure of one of the compressor turbine blades.
- [NTSB MIA96LA232](https://openairdocs.org/ntsb/MIA96LA232.md): Air Tractor 402 · Slocomb, AL · Accident · 1 fatal · Limited investigation · Final report · Sep 24, 1996 · N9130M · Destroyed
  > The pilot's failure to maintain airspeed.
- [NTSB FTW96FA399](https://openairdocs.org/ntsb/FTW96FA399.md): Ayres S2R-T45 · Granger, TX · Accident · 1 fatal · Field investigation · Final report · Sep 23, 1996 · N3107B · Destroyed
  > the pilot's inadvertent flight into adverse weather conditions, and subsequent loss of aircraft control due to spatial disorientation. Factors relating to the accident were darkness, the prevailing fog and low ceilings, the inadequate flight instruments…
- [NTSB ATL96LA130](https://openairdocs.org/ntsb/ATL96LA130.md): Air Tractor 402 · Mayersville, MS · Accident · 1 fatal · Limited investigation · Final report · Sep 21, 1996 · N1517G · Substantial damage
  > the pilot's misjudgment of his ground speed and distance to trees during the swath run, and his delayed pull-up at the end of the swath run, which resulted in his failure to remain clear of the trees. The tail wind and location of the trees were related…
- [NTSB LAX96LA328](https://openairdocs.org/ntsb/LAX96LA328.md): Cessna 425 · Auburn, CA · Accident · No injuries · Limited investigation · Final report · Sep 5, 1996 · N425WB · Substantial damage
  > failure of the right brake system (master cylinder O-ring seal). Factors relating to the accident were: the narrow runway, and the presence of a ditch adjacent to the runway.
- [NTSB CHI96IA191](https://openairdocs.org/ntsb/CHI96IA191.md): Beech 1900 · Lansing, MI · Incident · No injuries · Incident investigation · Final report · Jun 6, 1996 · N81538 · Minor damage
  > the short in the windshield anti-ice low power braided copper lead wire caused a fire that had resulted from the manufacturer's inadequate design.
- [NTSB ANC96LA076](https://openairdocs.org/ntsb/ANC96LA076.md): Beech 99C · Barrow, AK · Accident · Minor injuries · Limited investigation · Final report · May 21, 1996 · N216CS · Substantial damage
  > an in-flight collision with a bird.
- [NTSB MIA96WA150](https://openairdocs.org/ntsb/MIA96WA150.md): de Havilland DHC-6-200 · Bagua, Peru · Accident · 3 fatal · Foreign investigation · Mar 9, 1996 · N245GW · Destroyed
- [NTSB NYC96LA058](https://openairdocs.org/ntsb/NYC96LA058.md): Beech 1900D · Bradford, PA · Accident · Minor injuries · Limited investigation · Final report · Feb 7, 1996 · N159YV · Substantial damage
  > the pilot misjudged the flare during landing. Factors in the accident were: an improper recovery from a bounced landing, and the first officers lack of experience in this type operation.
- [NTSB LAX96LA070](https://openairdocs.org/ntsb/LAX96LA070.md): Cessna 208B · Sacramento, CA · Accident · No injuries · Limited investigation · Final report · Dec 12, 1995 · N987FE · Substantial damage
  > the pilot was given an erroneous wind velocity due to a malfunctioning wind gauge in the control tower. Factors relating to the accident were: the high/gusty wind conditions, and the pilot's improper evaluation of the actual wind condition.
- [NTSB MIA95LA229](https://openairdocs.org/ntsb/MIA95LA229.md): Air Tractor AT-502 · Lorida, FL · Accident · 1 fatal · Limited investigation · Final report · Sep 21, 1995 · N1529E · Substantial damage
  > Mismanagement of the fuel by the pilot resulting in the total loss of engine power due to fuel exhaustion, and the pilot's poor decision to fly over water en route to the refueling airport.
- [NTSB FTW95FA399](https://openairdocs.org/ntsb/FTW95FA399.md): Air Tractor AT-502A · Coleman, TX · Accident · 1 fatal · Field investigation · Final report · Sep 21, 1995 · N91969 · Destroyed
  > the pilot's continued flight into adverse weather resulting in spatial disorientation and loss of control. A factor was the pilot's improper weather evaluation and the weather.
- [NTSB ATL95LA168](https://openairdocs.org/ntsb/ATL95LA168.md): Air Tractor 502B · Minter City, MS · Accident · No injuries · Limited investigation · Final report · Sep 13, 1995 · N60237 · Substantial damage
  > Inadequate preflight planning/preparation by the pilot. Factors relating to the accident were: the excessive gross weight of the airplane and the high outside air temperature, which would have reduced the performance of the airplane.
- [NTSB CHI95LA278](https://openairdocs.org/ntsb/CHI95LA278.md): Air Tractor AT-400 · Hayti, MO · Accident · 1 fatal · Limited investigation · Final report · Aug 15, 1995 · N2315Z · Destroyed
  > the pilot inadvertently stalled the airplane. A factor was the reduced power setting.
- [NTSB LAX95LA283](https://openairdocs.org/ntsb/LAX95LA283.md): PZL-Mielec PZL-M-18 · Sacaton, AZ · Accident · No injuries · Limited investigation · Final report · Aug 9, 1995 · N6657C · Substantial damage
  > The loss of engine power due to a decoupling of the accessory drive that runs the high pressure engine-driven fuel pump.

Next page: https://openairdocs.org/ntsb.md?engine=52032&page=13

## 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 ('52032', '52034'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=52032&page=12

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