NTSB investigations: Lycoming T-53 series
79 cases on aircraft whose registry engine model is Lycoming T-53 series. Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.
Cases per year
| 1974 | 1 |
|---|---|
| 1976 | 1 |
| 1978 | 1 |
| 1980 | 3 |
| 1982 | 2 |
| 1984 | 1 |
| 1985 | 4 |
| 1986 | 1 |
| 1987 | 2 |
| 1989 | 2 |
| 1990 | 2 |
| 1991 | 2 |
| 1992 | 2 |
| 1993 | 4 |
| 1994 | 2 |
| 1995 | 1 |
| 1996 | 2 |
| 1997 | 7 |
| 1998 | 5 |
| 1999 | 3 |
| 2000 | 1 |
| 2001 | 2 |
| 2002 | 1 |
| 2003 | 1 |
| 2004 | 2 |
| 2005 | 2 |
| 2006 | 2 |
| 2007 | 2 |
| 2009 | 2 |
| 2010 | 1 |
| 2011 | 1 |
| 2014 | 1 |
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 1 |
| 2019 | 2 |
| 2020 | 1 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 1 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "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 ('41552', '41549', '41587'))
ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
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 ('41552', '41549', '41587'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB WPR24LA299Accident · Serious injuriesClass 4 · LimitedFinal reportWilliams Helicopter UH-1H · Colusa, CAThe pilot’s failure to set collective friction which resulted in collective bounce and subsequent loss of control.NTSB WPR24LA030Accident · No injuriesClass 3 · LimitedFinal reportArrow Falcon Exporters UH-1H · Firebaugh, CAAn on-ground fuel fire for reasons that could not be determined due to extensive thermal damage.NTSB WPR23LA118Accident · No injuriesClass 4 · LimitedFinal reportBell UH-1B · Orland, CAThe pilot’s inadequate fuel planning, which resulted in fuel exhaustion and a loss of engine power.NTSB WPR23LA097Accident · No injuriesClass 3 · LimitedFinal reportKaman Aerospace K-1200 · Sweet Home, ORImproper installation of the hardware retaining the adjustment screw in the N2 topping governor lever and roller assembly, which resulted in a partial loss of engine power.NTSB WPR22LA339Accident · Minor injuriesClass 3 · LimitedFinal reportBell 205A-1 · Cougar, WAThe helicopter’s encounter with downdrafts during a low-altitude hovering maneuver while dipping for water.NTSB ANC22FA047Accident · 1 fatalClass 3 · FieldFinal reportBell UH1B · Clear, AKA loss of control for reasons that could not be determined based on the available information.NTSB WPR22LA084Accident · No injuriesClass 3 · LimitedFinal reportBell UH-1E · Gustine, CAFailure of the 90° gearbox due to the lack of lubricating oil, which resulted in a loss of rotational drive to the tail rotor and a subsequent loss of control of the helicopter.NTSB WPR20LA211Accident · 1 fatalClass 3 · LimitedFinal reportBell UH1H · Payson, AZA flight control malfunction due to either a hydraulic hardover or a flight control stiffness event, which resulted in a loss of control.NTSB ERA20FA027Accident · 1 fatalClass 3 · FieldFinal reportGrumman OV-1 · Stuart, FLThe pilot’s improper recovery from a low-altitude aerobatic maneuver, which resulted in descent into terrain.NTSB GAA19CA345Accident · Serious injuriesData collectionFinal reportS M & T UH · Northway, AKThe pilot's failure to maintain a proper descent rate during landing, which resulted in impact with terrain.NTSB GAA17CA355Accident · No injuriesData collectionFinal reportBell UH1B · Williams, CAThe pilot’s failure to maintain clearance from transmission wires while maneuvering at a low altitude during an agricultural application flight.NTSB WPR16LA104Accident · No injuriesLimited investigationFinal reportBell UH 1B · Maxwell, CAA reduction in available engine power during takeoff due to a stuck hot air valve, which resulted in low rotor rpm and a forced landing. Contributing to the accident was the lack of dry film lubricant and the presence of corrosion on the hot air valve…NTSB WPR15LA219Accident · Minor injuriesLimited investigationFinal reportGarlick UH1H · Walla Walla, WAThe helicopter’s reduction in aerodynamic lift while operating in variable wind conditions for reasons that could not be determined because postaccident examination did not reveal any evidence of preimpact mechanical malfunctions or failures that would have…NTSB WPR14LA206Accident · Minor injuriesLimited investigationFinal reportWilliams Helicopter UH 1H · Waitsburg, WAAn extreme vibration immediately after entering forward flight for reasons that could not be determined because postaccident examination of the helicopter did not reveal any anomalies that would have precluded normal operation. Contributing to the accident…NTSB WPR11LA423Accident · Minor injuriesLimited investigationFinal reportArrow Falcon Exporters UH-1H · Stockton, CAA total loss of engine power due to the separation of a tooth from the starter-generator drive gear, which resulted in failure of the engine oil pump and subsequent oil starvation.NTSB WPR10FA295Accident · 1 fatalField investigationFinal reportKaman Aerospace K-1200 · Donnelly, IDThe collision of two counter-rotating main rotor blades for undetermined reasons, which resulted in a loss of control.NTSB CEN09LA565Accident · Serious injuriesLimited investigationFinal reportBell UH-1B · Arvilla, NDThe aircraft owner/mechanic/pilot's installation of an improper tail boom assembly and the resulting fatigue failure of the tail boom's attach fittings.NTSB WPR09LA241Accident · Serious injuriesLimited investigationFinal reportRotorcraft Development UH-1B · Richvale, CAThe pilot's failure to maintain control of the helicopter during takeoff for undetermined reasons.NTSB LAX07TA227Accident · 1 fatalFinal reportBell 205 A1++ · Happy Camp, CAthe pilot's failure to maintain clearance with the trees during a long-line operation. Contributing factors were the Forest Service's inadequate communication between crews, failure to properly assess the safety of the intended drop zone, reduced visibility…NTSB SEA07LA154Accident · No injuriesLimited investigationFinal reportBell UH-1B · Biggs, CALoss of control during hover for undetermined reasons.NTSB SEA06LA162Accident · 1 fatalLimited investigationFinal reportKaman HH-43F · Metaline Falls, WAThe failure of the left-hand cross-shaft input internal spline while the helicopter was in a hover, which resulted in the loss of gear box timing, in-flight blade contact and separation, and the subsequent loss of control and impact with a log deck.NTSB LAX06LA134Accident · No injuriesLimited investigationFinal reportBell UH-1H · Yuba City, CAThe pilot's in-flight loss of control of the helicopter for undetermined reasons. A factor was the trees.NTSB SEA05CA086Accident · No injuriesData collectionFinal reportWilliams Helicopter UH-1B · Uniontown, WAThe pilot's failure to maintain clearance from an object while maneuvering, which resulted in the main rotor blades striking a power pole. The power pole was a factor in the accident.NTSB SEA05WA091Accident · No injuriesForeign investigationBell UH-1F · Banda Ache, IndonesiaNTSB FTW04WA173Accident · No injuriesForeign investigationBell UH-1B · Las Bocas, MexicoNTSB SEA04LA043Accident · Serious injuriesLimited investigationFinal reportGarlick UH-1H · Liberty, WAThe failure of the tail rotor slider lugs due to fatigue while the helicopter was maneuvering.NTSB LAX04LA015Accident · No injuriesLimited investigationFinal reportBell UH-1B · Durham, CASeparation of the power turbine shaft retaining bolt resulting in extensive power turbine area damage and a loss of shaft output power.NTSB MIA02LA133Accident · Serious injuriesLimited investigationFinal reportBell UH-1B · Lorida, FLThe pilot's continued operation with known engine anomalies resulting in loss of engine power due to failure of the engine fuel control pump drive clutch assembly due to wear and collision with the terrain during the resultant descent.NTSB DEN01TA134Accident · No injuriesFinal reportBell 205A-1 · Jackson, WYthe Bell 212 helicopter pilot's inadequate visual lookout which resulted in a midair collision.NTSB SEA01LA046Accident · 1 fatalLimited investigationFinal reportWestern International UH-1H · Darby, MTInflight loss of a tail rotor pitch change link-to-blade grip attach bolt, resulting partial loss of tail rotor control, and subsequent entanglement of the helicopter's external load cable with a tree during emergency descent. Factors included the pilot's…NTSB MIA00LA170Accident · No injuriesLimited investigationFinal reportSouthwest Florida SW204 · Fort Pierce, FLAn in-flight separation of a tail rotor blade tip weight resulting in tail rotor assembly imbalance and separation due to the installation of an unapproved rotor blade by company maintenance personnel, and the subsequent collision with trees during an…NTSB LAX99LA283Accident · No injuriesLimited investigationFinal reportBell UH-1B · Lost Hills, CAFailure and separation of the 90-degree gearbox as a result of the disengagement of the pinion and gear teeth. The cause(s) of the pinion and gear disengagement were undetermined.NTSB FTW99WA109Accident · No injuriesForeign investigationBell UH1-B · Mexico City, MexicoNTSB LAX99TA066Accident · Serious injuriesFinal reportBell 205A-1 · Van Nuys, CAA loss of engine power due to an undetermined component failure in the second stage power turbine nozzle area. Factors in the accident were the mountainous/hilly nature of the terrain and the dark night lighting conditions which precluded the pilot from…NTSB SEA99LA020Accident · Serious injuriesLimited investigationFinal reportGarlick UH-1H · Darrington, WAThe total separation of the vertical fin (stabilizer), as the result of fatigue cracks which initiated in the fourth rivet hole above where the fin extends from the tailboom.NTSB FTW98LA405Accident · Minor injuriesLimited investigationFinal reportBell UH-1L · Price, UTThe pilot's inadvertent loss of tail rotor effectiveness. Factors were the high density altitude flight conditions, the unfavorable wind condition, and the none suitable terrain for an autorotation.NTSB SEA98FA104Accident · No injuriesField investigationFinal reportGarlick UH-1H · Couer D'Alene, IDFatigue failure of a reduction drive planetary gear. Factors include an unapproved part and plating process, and uneven terrain at the emergency landing site.NTSB SEA98FA077Accident · No injuriesField investigationFinal reportGarlick UH-1H · Hope, IDFailure of a misaligned main bearing in the engine. Factors include returning a previously unairworthy-tagged engine to service by the operator's maintenance personnel without sufficient information to identify and correct an unknown engine deficiency.NTSB LAX98GA127Accident · 4 fatalFinal reportBell 205A-1 · Los Angeles, CAAn excessive bending load applied to the tail rotor blade assembly of an undetermined origin which produced a fatigue crack, the separation of the assembly, and a forced landing. Factors were the lack of suitable terrain to perform a forced landing, the…NTSB SEA98LA017Accident · Minor injuriesLimited investigationFinal reportBell TH-1L · Canby, ORThe pilot's allowance of excessive airspeed resulting in the long-line hook impacting the tail rotor, and his allowance of an airspeed bleed-off preventing a successful run-on landing due to a loss of yaw control.NTSB SEA97LA198Accident · Serious injuriesLimited investigationFinal reportGarlick UH-1B · Dayville, ORImproper installation of the transmission door by a company mechanic, resulting in inflight separation of the door (which then struck the tail rotor system) and consequent total loss of the tail rotor. Contributing to the accident were: inadequate…NTSB SEA97FA196Accident · 1 fatalField investigationFinal reportSouthern Aero UH-1B · Skykomish, WAA fatigue fracture in the main rotor mast, which resulted in an in flight separation of the main rotor from the helicopter. Contributing to the accident was insufficient Federal Aviation Administration airworthiness standards and requirements for the aircraft.NTSB LAX97LA206Accident · No injuriesLimited investigationFinal reportBell UH-1B · Heron, CApartial loss of engine power for undetermined reasons. A factor relating to the accident was that the engine lost power when the helicopter was outside (below) the limits of the height/velocity curve.NTSB LAX97LA204Accident · No injuriesLimited investigationFinal reportBell 204-B · Kaneohe, HIfailure of the pilot to verify that the load was properly rigged before attempting to pick it up. The uneven (sloping) terrain was a related factor.NTSB MIA97TA139Accident · No injuriesFinal reportBell 204-B · Calderwood, TNThe inadequate maintenance inspection of the helicopter resulting in loss of lubrication from the main drive shaft going undetected until failure of the drive shaft.NTSB MIA97LA099Accident · Minor injuriesLimited investigationFinal reportBell UH-1B · Labelle, FLCompany maintenance personnel's failure to properly evaluate a main rotor system problem resulting in main rotor straps with multiple laminates separated due to fatigue cracking being allowed to continue in service until failure and separation of a main rotor…NTSB SEA97TA012Accident · Minor injuriesFinal reportGarlick UH-1H · Detroit, ORthe pilot's misjudgement of rotor clearance from the terrain. The proximity of the berm was a related factor.NTSB SEA96FA187Accident · Serious injuriesField investigationFinal reportGarlick UH-1H · Coeur D'Alene, IDFatigue fracture of the left forward vertical stabilizer spar, resulting in loss of the vertical stabilizer and tail rotor and subsequent loss of control. A factor was insufficient applicability (by make and model) of an existing FAA airworthiness directive…NTSB LAX95LA075Accident · No injuriesLimited investigationFinal reportKaman HH43 · Glendale, AZThe pilot's failure to maintain an adequate visual lookout to avoid a collision with a tree during an aerial application swath run.NTSB ATL94LA180Accident · Minor injuriesLimited investigationFinal reportBell UH-1B · Ozark, ALThe failure of the engines' main bearings because of a lack of lubrication. A factor was the heavily wooded terrain.