# Lycoming T-53 series - Type: Engine model (FAA registry) - Registry codes: 41552, 41549, 41587 - Manufacturer (registry): LYCOMING - Model: T-53 · T-53 SERIES · T-53 SER - Engine type: Turbo-shaft - Power: 1,150 hp - Installed in: 95 registered aircraft - Page: https://openairdocs.org/engine/lycoming-t-53-series The registry names only the engine series, so ADs for every model in the series are matched. The FAA lists this model under more than one registry code, usually for different spellings of the maker. This page covers them all. ## ADs that may apply (OpenAirDocs) Matched to this engine model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. - [AD 2022-10-02](https://openairdocs.org/ad/2022-10-02): Engine Controls · Honeywell International T53-L-703, T53-L-13B S/SB, T53-L-13B S/SA and 14 more. Effective Jun 28, 2022 - [AD 2009-15-13](https://openairdocs.org/ad/2009-15-13): Combustion chamber housings (CCHs) · Honeywell International T5313B, T5317A, T5317A-1 and 2 more. Effective Aug 25, 2009 - [AD 2006-11-16](https://openairdocs.org/ad/2006-11-16): Fuel control regulator assemblies · Honeywell International T53-L-703, T53-L-13B/D, T53-L-13B and 8 more. Effective Jul 5, 2006 - [AD 2006-01-05](https://openairdocs.org/ad/2006-01-05): Turboshaft engine · Honeywell International T53-L-703, T53-L-13B/D, T53-L-13B S/SB and 12 more. Effective Feb 16, 2006 - [AD 2002-15-04](https://openairdocs.org/ad/2002-15-04): Compressor impellers · Honeywell International T53-L-703, T53-L-13B/D, T53-L-13B and 4 more. Effective Sep 10, 2002 - [AD 2002-09-09](https://openairdocs.org/ad/2002-09-09): Centrifugal Compressor Impeller · Honeywell International T53-L-703, T53-L-13B/D, T53-L-13B and 10 more. Effective Jun 13, 2002 - [AD 97-21-07 R1](https://openairdocs.org/ad/97-21-07-R1): Accessory Drive Carrier Assembly · Honeywell International T53-L-703, T5313B, T5317A and 1 more. Effective Jul 6, 1998 - [AD 97-07-05](https://openairdocs.org/ad/97-07-05): Accessory Drive Assembly · Honeywell International T53-L-703, T5311A, T5311B and 4 more. Effective Jun 24, 1997 - [AD 96-17-01](https://openairdocs.org/ad/96-17-01): Suspect second stage power turbine disks · Honeywell International T5313B. Effective Sep 9, 1996 - [AD 95-10-04](https://openairdocs.org/ad/95-10-04): Centrifugal Compressor Impeller · Honeywell International T5313B, T5317A, T5317A-1 and 1 more. Effective May 25, 1995 - [AD 77-17-08](https://openairdocs.org/ad/77-17-08): Fuel Regulator P1 Multiplier Lever · Honeywell International T53-L-703, T5307A, T5309A and 7 more. Effective Mar 30, 1978 - [AD 75-22-02](https://openairdocs.org/ad/75-22-02): Secondary Failure N2 Accessory Drive Shaft · Honeywell International T5307A, T5309A, T5309B and 6 more. Effective Oct 29, 1975 - [AD 75-12-12](https://openairdocs.org/ad/75-12-12): Second Stage Gas Producer Cylinder Retaining Bolt · Honeywell International T5313A and T5313B. Effective Jun 18, 1975 - [AD 75-01-05](https://openairdocs.org/ad/75-01-05): Compressor Impeller Assembly Vane · Honeywell International T5313B. Effective Jan 17, 1975 - [AD 74-22-07](https://openairdocs.org/ad/74-22-07): Compressor Rotor Disks · Honeywell International T5313A. Effective Oct 31, 1974 - [AD 74-09-03](https://openairdocs.org/ad/74-09-03): Compressor Rotor Discs · Honeywell International T5309C, T5311A and T5311B. Effective May 2, 1974 - [AD 71-08-06](https://openairdocs.org/ad/71-08-06): Overspeed Pickup Housing Assembly · Honeywell International T5313A and T5313B. Effective Apr 16, 1971 Historical (superseded or no longer in force): - [AD 2002-03-01](https://openairdocs.org/ad/2002-03-01) (historical): Reduction Gearbox Assembly · Honeywell International T5311A, T5311B, T5313B and 2 more. Effective Mar 21, 2002 - [AD 98-22-11](https://openairdocs.org/ad/98-22-11) (historical): Fuel Pumps · Honeywell International T5317A-1. Effective Dec 18, 1998 - [AD 87-12-05](https://openairdocs.org/ad/87-12-05) (historical): Gas Producer Turbine and Power Turbine Disks · Honeywell International T5313B. Effective Jul 20, 1987 ## Registered aircraft (95, first 50) - [N101VD](https://openairdocs.org/aircraft/N101VD): [Tempest LLC](https://openairdocs.org/faa-owner/TEMPEST%20LLC), [Reno, NV](https://openairdocs.org/faa-place/NV/Reno), S/N 69-17004 - [N109MA](https://openairdocs.org/aircraft/N109MA): [Minuteman Aviation Inc](https://openairdocs.org/faa-owner/MINUTEMAN%20AVIATION%20INC), [Missoula, MT](https://openairdocs.org/faa-place/MT/Missoula), built 1968, S/N 68-15334 - [N10RF](https://openairdocs.org/aircraft/N10RF): [Brown Helicopter Inc](https://openairdocs.org/faa-owner/BROWN%20HELICOPTER%20INC), [Pensacola, FL](https://openairdocs.org/faa-place/FL/Pensacola), built 1973, S/N 73-21715 - [N117DR](https://openairdocs.org/aircraft/N117DR): [Northwest Helicopters I Inc](https://openairdocs.org/faa-owner/NORTHWEST%20HELICOPTERS%20I%20INC), [Olympia, WA](https://openairdocs.org/faa-place/WA/Olympia), built 1995, S/N 65-12871 - [N121PT](https://openairdocs.org/aircraft/N121PT): [Lrh Equipment LLC](https://openairdocs.org/faa-owner/LRH%20EQUIPMENT%20LLC), [Pendleton, OR](https://openairdocs.org/faa-place/OR/Pendleton), built 1964, S/N 64-13711 - [N133](https://openairdocs.org/aircraft/N133): [Brown Helicopter Inc](https://openairdocs.org/faa-owner/BROWN%20HELICOPTER%20INC), [Pensacola, FL](https://openairdocs.org/faa-place/FL/Pensacola), built 1966, S/N 65-09847 - [N134AW](https://openairdocs.org/aircraft/N134AW): [American Wings Air Museum](https://openairdocs.org/faa-owner/AMERICAN%20WINGS%20AIR%20MUSEUM), [Blaine, MN](https://openairdocs.org/faa-place/MN/Blaine), built 1969, S/N 68-15936 - [N134RV](https://openairdocs.org/aircraft/N134RV): [Tempest LLC](https://openairdocs.org/faa-owner/TEMPEST%20LLC), [Reno, NV](https://openairdocs.org/faa-place/NV/Reno), built 1964, S/N 64-14262 - [N1363W](https://openairdocs.org/aircraft/N1363W): [Withrotor Aviation Inc](https://openairdocs.org/faa-owner/WITHROTOR%20AVIATION%20INC), [Lakeview, OR](https://openairdocs.org/faa-place/OR/Lakeview), built 1966, S/N 66-16854 - [N137US](https://openairdocs.org/aircraft/N137US): [Thomas Aviation LLC](https://openairdocs.org/faa-owner/THOMAS%20AVIATION%20LLC), [Orleans, CA](https://openairdocs.org/faa-place/CA/Orleans), built 1965, S/N 151874 - [N145MA](https://openairdocs.org/aircraft/N145MA): [Minuteman Aviation Inc](https://openairdocs.org/faa-owner/MINUTEMAN%20AVIATION%20INC), [Missoula, MT](https://openairdocs.org/faa-place/MT/Missoula), built 1972, S/N 72-21584 - [N154TL](https://openairdocs.org/aircraft/N154TL): [Jtbam Inc](https://openairdocs.org/faa-owner/JTBAM%20INC), [Lakeside, AZ](https://openairdocs.org/faa-place/AZ/Lakeside), built 1988, S/N 154770 - [N17HX](https://openairdocs.org/aircraft/N17HX): [Helicopter Express LLC](https://openairdocs.org/faa-owner/HELICOPTER%20EXPRESS%20LLC), [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee), built 1975, S/N 30217 - [N198HM](https://openairdocs.org/aircraft/N198HM): [R & R Conner Aviation LLC](https://openairdocs.org/faa-owner/R%20%26%20R%20CONNER%20AVIATION%20LLC), [Conner, MT](https://openairdocs.org/faa-place/MT/Conner), built 1962, S/N 62-1996 - [N204AQ](https://openairdocs.org/aircraft/N204AQ): [Tamarack Helicopters Inc](https://openairdocs.org/faa-owner/TAMARACK%20HELICOPTERS%20INC), [Stevensville, MT](https://openairdocs.org/faa-place/MT/Stevensville), S/N 2198 - [N204DS](https://openairdocs.org/aircraft/N204DS): [Greenwood Helicopters Inc](https://openairdocs.org/faa-owner/GREENWOOD%20HELICOPTERS%20INC), [Washington, NC](https://openairdocs.org/faa-place/NC/Washington), built 1960, S/N 60-3594 - [N204DX](https://openairdocs.org/aircraft/N204DX): [Farwest Aviation LLC](https://openairdocs.org/faa-owner/FARWEST%20AVIATION%20LLC), [Billings, MT](https://openairdocs.org/faa-place/MT/Billings), S/N 61-787 - [N204GP](https://openairdocs.org/aircraft/N204GP): [Jones Aviation Inc](https://openairdocs.org/faa-owner/JONES%20AVIATION%20INC), [Biggs, CA](https://openairdocs.org/faa-place/CA/Biggs), built 1964, S/N 64-14073 - [N204JB](https://openairdocs.org/aircraft/N204JB): [Premier Aircraft Services LLC](https://openairdocs.org/faa-owner/PREMIER%20AIRCRAFT%20SERVICES%20LLC), [Bakersfield, CA](https://openairdocs.org/faa-place/CA/Bakersfield), built 1963, S/N 63-13088 - [N204PJ](https://openairdocs.org/aircraft/N204PJ): [Jones Flying Service Inc](https://openairdocs.org/faa-owner/JONES%20FLYING%20SERVICE%20INC), [Biggs, CA](https://openairdocs.org/faa-place/CA/Biggs), built 1962, S/N 621893 - [N205BD](https://openairdocs.org/aircraft/N205BD): [Ventus Ff LLC](https://openairdocs.org/faa-owner/VENTUS%20FF%20LLC), [Boise, ID](https://openairdocs.org/faa-place/ID/Boise), built 1971, S/N 30097 - [N205BT](https://openairdocs.org/aircraft/N205BT): [Redding Air Service Inc](https://openairdocs.org/faa-owner/REDDING%20AIR%20SERVICE%20INC), [Redding, CA](https://openairdocs.org/faa-place/CA/Redding), built 1974, S/N 30173 - [N205VC](https://openairdocs.org/aircraft/N205VC): [Ventura County Sheriffs Department](https://openairdocs.org/faa-owner/VENTURA%20COUNTY%20SHERIFFS%20DEPARTMENT), [Camarillo, CA](https://openairdocs.org/faa-place/CA/Camarillo), built 1969, S/N 30066 - [N2252A](https://openairdocs.org/aircraft/N2252A): [Premier Aircraft Services LLC](https://openairdocs.org/faa-owner/PREMIER%20AIRCRAFT%20SERVICES%20LLC), [Bakersfield, CA](https://openairdocs.org/faa-place/CA/Bakersfield), built 1961, S/N 61-0798 - [N22753](https://openairdocs.org/aircraft/N22753): [Martins Dusters Inc](https://openairdocs.org/faa-owner/MARTINS%20DUSTERS%20INC), [Colusa, CA](https://openairdocs.org/faa-place/CA/Colusa), built 1964, S/N 64-13985 - [N234SJ](https://openairdocs.org/aircraft/N234SJ): [Porter Flying Services Inc](https://openairdocs.org/faa-owner/PORTER%20FLYING%20SERVICES%20INC), [Chico, CA](https://openairdocs.org/faa-place/CA/Chico), built 1962, S/N 388 - [N256KT](https://openairdocs.org/aircraft/N256KT): [Kord Technologies Inc](https://openairdocs.org/faa-owner/KORD%20TECHNOLOGIES%20INC), [Huntsville, AL](https://openairdocs.org/faa-place/AL/Huntsville), S/N 69-15075 - [N262RC](https://openairdocs.org/aircraft/N262RC): [US Airlift Command Inc](https://openairdocs.org/faa-owner/US%20AIRLIFT%20COMMAND%20INC), [Anderson, SC](https://openairdocs.org/faa-place/SC/Anderson), built 1971, S/N 70-16443 - [N264RM](https://openairdocs.org/aircraft/N264RM): [Rocky Mountain Construction LLC](https://openairdocs.org/faa-owner/ROCKY%20MOUNTAIN%20CONSTRUCTION%20LLC), [Klamath Falls, OR](https://openairdocs.org/faa-place/OR/Klamath%20Falls), built 2012, S/N 70-16424 - [N2650N](https://openairdocs.org/aircraft/N2650N): [Iaba LLC](https://openairdocs.org/faa-owner/IABA%20LLC), [Norfolk, VA](https://openairdocs.org/faa-place/VA/Norfolk), S/N 2002 - [N2773H](https://openairdocs.org/aircraft/N2773H): [Summit Helicopters Inc](https://openairdocs.org/faa-owner/SUMMIT%20HELICOPTERS%20INC), [Salem, VA](https://openairdocs.org/faa-place/VA/Salem), built 1979, S/N 30296 - [N283HF](https://openairdocs.org/aircraft/N283HF): [Army Aviation Heritage Foundation And Museum Inc](https://openairdocs.org/faa-owner/ARMY%20AVIATION%20HERITAGE%20FOUNDATION%20AND%20MUSEUM%20INC), [Hampton, GA](https://openairdocs.org/faa-place/GA/Hampton), built 1966, S/N 66-15283 - [N28HX](https://openairdocs.org/aircraft/N28HX): [Helicopter Express LLC](https://openairdocs.org/faa-owner/HELICOPTER%20EXPRESS%20LLC), [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee), built 1968, S/N 30034 - [N3053Q](https://openairdocs.org/aircraft/N3053Q): [West Valley Aviation Inc](https://openairdocs.org/faa-owner/WEST%20VALLEY%20AVIATION%20INC), [Five Points, CA](https://openairdocs.org/faa-place/CA/Five%20Points), built 1966, S/N 66-1104 - [N313B](https://openairdocs.org/aircraft/N313B): [Northwest Helicopters Inc](https://openairdocs.org/faa-owner/NORTHWEST%20HELICOPTERS%20INC), [Olympia, WA](https://openairdocs.org/faa-place/WA/Olympia), built 1963, S/N 63-08765 - [N333XL](https://openairdocs.org/aircraft/N333XL): [Cj Air LLC](https://openairdocs.org/faa-owner/CJ%20AIR%20LLC), [Nezperce, ID](https://openairdocs.org/faa-place/ID/Nezperce), built 1967, S/N 154951 - [N334WN](https://openairdocs.org/aircraft/N334WN): [Pope Jim D DBA](https://openairdocs.org/faa-owner/POPE%20JIM%20D%20DBA), [Lewiston, ID](https://openairdocs.org/faa-place/ID/Lewiston), built 1962, S/N 62-2097 - [N33HX](https://openairdocs.org/aircraft/N33HX): [Copter Lease LLC Trustee](https://openairdocs.org/faa-owner/COPTER%20LEASE%20LLC%20TRUSTEE), [Albuquerque, NM](https://openairdocs.org/faa-place/NM/Albuquerque), built 1976, S/N 30235 - [N3605](https://openairdocs.org/aircraft/N3605): [Mann Peter D](https://openairdocs.org/faa-owner/MANN%20PETER%20D), [Willows, CA](https://openairdocs.org/faa-place/CA/Willows), built 1944, S/N 568 - [N3803C](https://openairdocs.org/aircraft/N3803C): [State Of Colorado Department Of Public Safety](https://openairdocs.org/faa-owner/STATE%20OF%20COLORADO%20DEPARTMENT%20OF%20PUBLIC%20SAFETY), [Lakewood, CO](https://openairdocs.org/faa-place/CO/Lakewood), built 1968, S/N 30006 - [N3804C](https://openairdocs.org/aircraft/N3804C): [State Of Colorado Department Of Public Safety](https://openairdocs.org/faa-owner/STATE%20OF%20COLORADO%20DEPARTMENT%20OF%20PUBLIC%20SAFETY), [Lakewood, CO](https://openairdocs.org/faa-place/CO/Lakewood), built 1980, S/N 30314 - [N3XL](https://openairdocs.org/aircraft/N3XL): [Nixon Helicopters LLC](https://openairdocs.org/faa-owner/NIXON%20HELICOPTERS%20LLC), [Mentone, CA](https://openairdocs.org/faa-place/CA/Mentone), built 1977, S/N 77-22758 - [N4040P](https://openairdocs.org/aircraft/N4040P): [R & R Conner Aviation LLC](https://openairdocs.org/faa-owner/R%20%26%20R%20CONNER%20AVIATION%20LLC), [Conner, MT](https://openairdocs.org/faa-place/MT/Conner), built 1965, S/N 65-7911 - [N406JP](https://openairdocs.org/aircraft/N406JP): [Heli-Works Flight Services LLC](https://openairdocs.org/faa-owner/HELI-WORKS%20FLIGHT%20SERVICES%20LLC), [Deer Lodge, MT](https://openairdocs.org/faa-place/MT/Deer%20Lodge), built 1969, S/N 69-15855 - [N40722](https://openairdocs.org/aircraft/N40722): [West Valley Aviation Inc](https://openairdocs.org/faa-owner/WEST%20VALLEY%20AVIATION%20INC), [Five Points, CA](https://openairdocs.org/faa-place/CA/Five%20Points), built 1969, S/N 69-15256 - [N41109](https://openairdocs.org/aircraft/N41109): [Lrh Equipment LLC](https://openairdocs.org/faa-owner/LRH%20EQUIPMENT%20LLC), [Pendleton, OR](https://openairdocs.org/faa-place/OR/Pendleton), S/N 11968 - [N4376D](https://openairdocs.org/aircraft/N4376D): [Planes Of Fame Air Museum](https://openairdocs.org/faa-owner/PLANES%20OF%20FAME%20AIR%20MUSEUM), [Chino, CA](https://openairdocs.org/faa-place/CA/Chino), S/N 61-2692 - [N43FK](https://openairdocs.org/aircraft/N43FK): [Kaman Aerospace Corp](https://openairdocs.org/faa-owner/KAMAN%20AEROSPACE%20CORP), [Bloomfield, CT](https://openairdocs.org/faa-place/CT/Bloomfield), built 1962, S/N 60-0289 - [N444SJ](https://openairdocs.org/aircraft/N444SJ): [Jones Flying Service](https://openairdocs.org/faa-owner/JONES%20FLYING%20SERVICE), [Biggs, CA](https://openairdocs.org/faa-place/CA/Biggs), built 1962, S/N 391 - [N453CC](https://openairdocs.org/aircraft/N453CC): [Helo 1 LLC](https://openairdocs.org/faa-owner/HELO%201%20LLC), [Anchorage, AK](https://openairdocs.org/faa-place/AK/Anchorage), built 1968, S/N 155352 All 95: https://openairdocs.org/engine/lycoming-t-53-series/aircraft.md ## NTSB investigations (80, newest 50) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB WPR24LA299](https://openairdocs.org/ntsb/WPR24LA299), Aug 30, 2024: Williams Helicopter UH-1H (N710WD), Colusa, CA, substantial damage. Probable cause: The pilot’s failure to set collective friction which resulted in collective bounce and subsequent loss of control. - [NTSB WPR24LA030](https://openairdocs.org/ntsb/WPR24LA030), Nov 4, 2023: Arrow Falcon Exporters UH-1H (N3053Q), Firebaugh, CA, substantial damage. Probable cause: An on-ground fuel fire for reasons that could not be determined due to extensive thermal damage. - [NTSB WPR23LA118](https://openairdocs.org/ntsb/WPR23LA118), Mar 2, 2023: Bell UH-1B (N234SJ), Orland, CA, substantial damage. Probable cause: The pilot’s inadequate fuel planning, which resulted in fuel exhaustion and a loss of engine power. - [NTSB WPR23LA097](https://openairdocs.org/ntsb/WPR23LA097), Jan 24, 2023: Kaman Aerospace K-1200 (N202WM), Sweet Home, OR, substantial damage. Probable cause: Improper 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 WPR22LA339](https://openairdocs.org/ntsb/WPR22LA339), Sep 7, 2022: Bell 205A-1 (N66HJ), Cougar, WA, substantial damage. Probable cause: The helicopter’s encounter with downdrafts during a low-altitude hovering maneuver while dipping for water. - [NTSB ANC22FA047](https://openairdocs.org/ntsb/ANC22FA047), Jun 27, 2022: Bell UH1B (N9970F), Clear, AK, destroyed, 1 fatal. Probable cause: A loss of control for reasons that could not be determined based on the available information. - [NTSB WPR22LA084](https://openairdocs.org/ntsb/WPR22LA084), Jan 23, 2022: Bell UH-1E (N333XL), Gustine, CA, substantial damage. Probable cause: Failure 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 WPR20LA211](https://openairdocs.org/ntsb/WPR20LA211), Jul 7, 2020: Bell UH1H (N623PB), Payson, AZ, destroyed, 1 fatal. Probable cause: A flight control malfunction due to either a hydraulic hardover or a flight control stiffness event, which resulted in a loss of control. - [NTSB ERA20FA027](https://openairdocs.org/ntsb/ERA20FA027), Nov 1, 2019: Grumman OV-1 (N10VD), Stuart, FL, destroyed, 1 fatal. Probable cause: The pilot’s improper recovery from a low-altitude aerobatic maneuver, which resulted in descent into terrain. - [NTSB GAA19CA345](https://openairdocs.org/ntsb/GAA19CA345), Jun 10, 2019: S M & T UH (N64771), Northway, AK, substantial damage. Probable cause: The pilot's failure to maintain a proper descent rate during landing, which resulted in impact with terrain. - [NTSB GAA17CA355](https://openairdocs.org/ntsb/GAA17CA355), Jun 21, 2017: Bell UH1B (N6180A), Williams, CA, substantial damage. Probable cause: The pilot’s failure to maintain clearance from transmission wires while maneuvering at a low altitude during an agricultural application flight. - [NTSB WPR16LA104](https://openairdocs.org/ntsb/WPR16LA104), May 7, 2016: Bell UH 1B (N486SA), Maxwell, CA, substantial damage. Probable cause: A 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… - [NTSB WPR15LA219](https://openairdocs.org/ntsb/WPR15LA219), Jul 21, 2015: Garlick UH1H (N121PT), Walla Walla, WA, destroyed. Probable cause: The 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… - [NTSB WPR14LA206](https://openairdocs.org/ntsb/WPR14LA206), May 23, 2014: Williams Helicopter UH 1H (N260TA), Waitsburg, WA, substantial damage. Probable cause: An 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… - [NTSB WPR11LA423](https://openairdocs.org/ntsb/WPR11LA423), Sep 2, 2011: Arrow Falcon Exporters UH-1H (N205PJ), Stockton, CA, substantial damage. Probable cause: A 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 WPR10FA295](https://openairdocs.org/ntsb/WPR10FA295), Jun 16, 2010: Kaman Aerospace K-1200 (N134WC), Donnelly, ID, substantial damage, 1 fatal. Probable cause: The collision of two counter-rotating main rotor blades for undetermined reasons, which resulted in a loss of control. - [NTSB CEN09LA565](https://openairdocs.org/ntsb/CEN09LA565), Sep 6, 2009: Bell UH-1B (N204JB), Arvilla, ND, substantial damage. Probable cause: The 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 WPR09LA241](https://openairdocs.org/ntsb/WPR09LA241), May 13, 2009: Rotorcraft Development UH-1B (N843M), Richvale, CA, substantial damage. Probable cause: The pilot's failure to maintain control of the helicopter during takeoff for undetermined reasons. - [NTSB LAX07TA227](https://openairdocs.org/ntsb/LAX07TA227), Jul 23, 2007: Bell 205 A1++ (N205BR), Happy Camp, CA, destroyed, 1 fatal. Probable cause: the 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… - [NTSB SEA07LA154](https://openairdocs.org/ntsb/SEA07LA154), Jun 12, 2007: Bell UH-1B (N2087S), Biggs, CA, substantial damage. Probable cause: Loss of control during hover for undetermined reasons. - [NTSB SEA06LA162](https://openairdocs.org/ntsb/SEA06LA162), Aug 18, 2006: Kaman HH-43F (N559D), Metaline Falls, WA, destroyed, 1 fatal. Probable cause: The 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… - [NTSB LAX06LA134](https://openairdocs.org/ntsb/LAX06LA134), Apr 1, 2006: Bell UH-1H (N710WD), Yuba City, CA, substantial damage. Probable cause: The pilot's in-flight loss of control of the helicopter for undetermined reasons. A factor was the trees. - [NTSB SEA05CA086](https://openairdocs.org/ntsb/SEA05CA086), Apr 25, 2005: Williams Helicopter UH-1B (N334WN), Uniontown, WA, substantial damage. Probable cause: The 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 SEA05WA091](https://openairdocs.org/ntsb/SEA05WA091), Mar 29, 2005: Bell UH-1F (N4040P), Banda Ache, Indonesia, substantial damage - [NTSB FTW04WA173](https://openairdocs.org/ntsb/FTW04WA173), Jun 12, 2004: Bell UH-1B (N64CC), Las Bocas, Mexico, substantial damage - [NTSB SEA04LA043](https://openairdocs.org/ntsb/SEA04LA043), Feb 23, 2004: Garlick UH-1H (N6257P), Liberty, WA, substantial damage. Probable cause: The failure of the tail rotor slider lugs due to fatigue while the helicopter was maneuvering. - [NTSB LAX04LA015](https://openairdocs.org/ntsb/LAX04LA015), Oct 16, 2003: Bell UH-1B (N234SJ), Durham, CA, substantial damage. Probable cause: Separation of the power turbine shaft retaining bolt resulting in extensive power turbine area damage and a loss of shaft output power. - [NTSB MIA02LA133](https://openairdocs.org/ntsb/MIA02LA133), Jul 16, 2002: Bell UH-1B (N91281), Lorida, FL, substantial damage. Probable cause: The 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… - [NTSB DEN01TA134](https://openairdocs.org/ntsb/DEN01TA134), Jul 31, 2001: Bell 205A-1 (N205BR), Jackson, WY, substantial damage. Probable cause: the Bell 212 helicopter pilot's inadequate visual lookout which resulted in a midair collision. - [NTSB SEA01LA046](https://openairdocs.org/ntsb/SEA01LA046), Feb 7, 2001: Western International UH-1H (N205GL), Darby, MT, substantial damage, 1 fatal. Probable cause: Inflight 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… - [NTSB MIA00LA170](https://openairdocs.org/ntsb/MIA00LA170), May 24, 2000: Southwest Florida SW204 (N37BA), Fort Pierce, FL, substantial damage. Probable cause: An 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… - [NTSB LAX99LA283](https://openairdocs.org/ntsb/LAX99LA283), Aug 25, 1999: Bell UH-1B (N999SJ), Lost Hills, CA, substantial damage. Probable cause: Failure 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 FTW99WA109](https://openairdocs.org/ntsb/FTW99WA109), Apr 5, 1999: Bell UH1-B (N64CC), Mexico City, Mexico, substantial damage - [NTSB FTW99WA109](https://openairdocs.org/ntsb/FTW99WA109), Apr 5, 1999: Bell UH1-B (N123SJ), Mexico City, Mexico, destroyed - [NTSB LAX99TA066](https://openairdocs.org/ntsb/LAX99TA066), Jan 3, 1999: Bell 205A-1 (N58126), Van Nuys, CA, substantial damage. Probable cause: A 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… - [NTSB SEA99LA020](https://openairdocs.org/ntsb/SEA99LA020), Dec 14, 1998: Garlick UH-1H (N94NW), Darrington, WA, substantial damage. Probable cause: The 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 FTW98LA405](https://openairdocs.org/ntsb/FTW98LA405), Sep 19, 1998: Bell UH-1L (N5107J), Price, UT, substantial damage. Probable cause: The 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 SEA98FA104](https://openairdocs.org/ntsb/SEA98FA104), Jun 18, 1998: Garlick UH-1H (N869W), Couer D'Alene, ID, substantial damage. Probable cause: Fatigue failure of a reduction drive planetary gear. Factors include an unapproved part and plating process, and uneven terrain at the emergency landing site. - [NTSB SEA98FA077](https://openairdocs.org/ntsb/SEA98FA077), May 19, 1998: Garlick UH-1H (N98NW), Hope, ID, substantial damage. Probable cause: Failure 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… - [NTSB LAX98GA127](https://openairdocs.org/ntsb/LAX98GA127), Mar 23, 1998: Bell 205A-1 (N90230), Los Angeles, CA, destroyed, 4 fatal. Probable cause: An 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… - [NTSB SEA98LA017](https://openairdocs.org/ntsb/SEA98LA017), Nov 25, 1997: Bell TH-1L (N8160G), Canby, OR, substantial damage. Probable cause: The 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… - [NTSB SEA97LA198](https://openairdocs.org/ntsb/SEA97LA198), Aug 29, 1997: Garlick UH-1B (N22753), Dayville, OR, substantial damage. Probable cause: Improper 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… - [NTSB SEA97FA196](https://openairdocs.org/ntsb/SEA97FA196), Aug 27, 1997: Southern Aero UH-1B (N896W), Skykomish, WA, substantial damage, 1 fatal. Probable cause: A 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… - [NTSB LAX97LA206](https://openairdocs.org/ntsb/LAX97LA206), Jun 11, 1997: Bell UH-1B (N888SJ), Heron, CA, destroyed. Probable cause: partial 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 LAX97LA204](https://openairdocs.org/ntsb/LAX97LA204), Jun 6, 1997: Bell 204-B (N64F), Kaneohe, HI, substantial damage. Probable cause: failure 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 MIA97TA139](https://openairdocs.org/ntsb/MIA97TA139), Apr 16, 1997: Bell 204-B (N4580Y), Calderwood, TN, destroyed. Probable cause: The 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 MIA97LA099](https://openairdocs.org/ntsb/MIA97LA099), Mar 11, 1997: Bell UH-1B (N70696), Labelle, FL, destroyed. Probable cause: Company 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… - [NTSB SEA97TA012](https://openairdocs.org/ntsb/SEA97TA012), Oct 20, 1996: Garlick UH-1H (N98NW), Detroit, OR, substantial damage. Probable cause: the pilot's misjudgement of rotor clearance from the terrain. The proximity of the berm was a related factor. - [NTSB SEA96FA187](https://openairdocs.org/ntsb/SEA96FA187), Aug 12, 1996: Garlick UH-1H (N97NW), Coeur D'Alene, ID, substantial damage. Probable cause: Fatigue 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… - [NTSB LAX95LA075](https://openairdocs.org/ntsb/LAX95LA075), Jan 10, 1995: Kaman HH43 (N321WN), Glendale, AZ, substantial damage. Probable cause: The pilot's failure to maintain an adequate visual lookout to avoid a collision with a tree during an aerial application swath run. All 80: https://openairdocs.org/engine/lycoming-t-53-series/ntsb.md ## FAA accident and incident reports (94, newest 50) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Accident 20231104021059A](https://openairdocs.org/incident/20231104021059A), Nov 4, 2023: Bell UH-1H (N3053Q), Firebaugh, CA, Destroyed. On November 4, 2023, [privacy data omitted] a Bell UH-1H helicopter caught fire during the startup of a maintenance check. During the engine startup, it was… - [Accident 20230302001889A](https://openairdocs.org/incident/20230302001889A), Mar 2, 2023: Bell UH-1B (N234SJ), Orland, CA, Substantial damage. After taking off from county road 24, pilot reported running out of fuel during aerial application on an orchard. The pilot said in a verbal statement that it… - [Accident 20230124001399A](https://openairdocs.org/incident/20230124001399A), Jan 24, 2023: Kaman Aerospace Corp K-1200 (N202WM), Sweet Home, OR, Substantial damage. During an approach to a log landing insuffecient power was avaiable to arrest descent. Pilot commanded the release of the load form the hook. Aircraft settled… - [Accident 20220907013509A](https://openairdocs.org/incident/20220907013509A), Sep 7, 2022: Bell BHT-205A-1 (N66HJ), Cougar, WA, Substantial damage. As stated by the pilot, aircraft was in a hover approximately 100 feet above the water with water bucket attacked to external long line sitting on the water.… - [Accident 20220626008299A](https://openairdocs.org/incident/20220626008299A), Jun 26, 2022: Bell UH-1B (N9970F), Anderson, AK, Destroyed, 1 fatal. Numerous witnesses reported that after a normal liftoff, the helicopter hovered with the longline fully extended as it maneuvered to hook up to the external… - [Accident 20220123001259A](https://openairdocs.org/incident/20220123001259A), Jan 23, 2022: Bell UH-1E (N333XL), Gustine, CA, Destroyed. Pilot was performing aerial application, while performing turning maneuver loss control resulting in crash. No injuries, damage to crop field, and aircraft… - [Accident 20200707011479A](https://openairdocs.org/incident/20200707011479A), Jul 7, 2020: Bell UH-1H (N623PB), Payson, AZ, Destroyed, 1 fatal. On Tuesday, July 7, 2020 at approximately 1216 MST, a UH-1H helicopter, N623PB, impacted terrain with one occupant on board. The aircraft was performing… - [Accident 20191101020589A](https://openairdocs.org/incident/20191101020589A), Nov 1, 2019: Grumman OV-1/RV-1 (N10VD), Stuart, FL, Destroyed, 1 fatal. On November 1, 2019, about 1310 eastern daylight time, a Grumman OV-1D, N10VD, registered to MD aviation limited, was performing a demonstration flight at the… - [Accident 20190610006589A](https://openairdocs.org/incident/20190610006589A), Jun 10, 2019: S M & T Aircraft UH-1B (N64771), Northway, AK, Substantial damage. Crew was hauling an internal load of fuel at close to gross weight of the helicopter approximately 35 miles north east of Northway Alaska. [privacy data… - [Accident 20170621008579A](https://openairdocs.org/incident/20170621008579A), Jun 21, 2017: Bell UH-1B (N6180A), Williams, CA, Substantial damage. Pilot struck wires during field application - [Incident 20170217001039I](https://openairdocs.org/incident/20170217001039I), Feb 17, 2017: Grumman OV-1/RV-1 (N10VD), Jacksonville, FL, Minor damage. On February 17, 2017, at or about 21:00 local time the pilot in command of N10VD, a Grumman OV-1 experimental exhibition aircraft, experienced and reported to… - [Accident 20150720011009A](https://openairdocs.org/incident/20150720011009A), Jul 20, 2015: Bell UH-1H (N121PT), Walla Walla, WA, Destroyed. Pilot reported rotor RPM decay while hovering to pick up water from a stream for firefighting. No master caution or other warnings were given. Engine RPM was… - [Accident 20140523008029A](https://openairdocs.org/incident/20140523008029A), May 23, 2014: Williams Helicopter Corp UH-1H (N260TA), Waitsburg, WA, Substantial damage. Take off from owner operators property, during transisitional lift helicopter crashed under unkown circumstances in Waitsburg, WA. - [Incident 20120413006569I](https://openairdocs.org/incident/20120413006569I), Apr 13, 2012: Bell 205A-1 (N17HX), Hot Springs, VA, Minor damage. While engaged in fire fighting activities and preparing to fill the water bucket from a pond. The pilot stated that the aircraft began to settle. In… - [Accident 20110901022849A](https://openairdocs.org/incident/20110901022849A), Sep 1, 2011: Arrow Falcon Exporters Inc UH-1H (N205PJ), Trull, CA, Substantial damage. The pilot reported that while in cruise flight he noted a low oil indication to the engine. As pilot was performing a precautionary landing, the engine had a… - [Accident 20100616035869A](https://openairdocs.org/incident/20100616035869A), Jun 16, 2010: Kaman Aeros K-1200 (N134WC), Donnelly, ID, Destroyed, 1 fatal. The pilot was manuevering after lifting a load during helicopter logging operations. During the manuever the rotor blades came apart and the lf pylon came off… - [Incident 20091115024119I](https://openairdocs.org/incident/20091115024119I), Nov 15, 2009: Bell 204B (N204AH), Fullerton, CA, Substantial damage. Pilot started aircraft to charge up battery, intended to taxi to wash rack. Decided to get out with engine running to get a bottle of water from his car.… - [Accident 20090906025899A](https://openairdocs.org/incident/20090906025899A), Sep 6, 2009: Bell UH-1B (N204JB), Arvilla, ND, Destroyed. While on a 14 CFR part 137 commercial revenue flight, performing aerial applications, an appropriately rated and certificated pilot experienced a loud noise… - [Accident 20090513017439A](https://openairdocs.org/incident/20090513017439A), May 13, 2009: Bell UH1B (N843M), Richvaille, CA, Substantial damage. (-23) During a repositioning flight the pilot lost control of the aircraft and it struck a hanger. The aircraft was substantial damaged. The pilot received… - [Incident 20081025851709I](https://openairdocs.org/incident/20081025851709I), Oct 25, 2008: Bell 204B (N204AH), Fullerton, CA, Minor damage. (-23) Pilot stated after takeoff from ful he heard a loud sound and elected to land the helicopter back at ful. Inspection showed the engine cowling had… - [Accident 20070723020949A](https://openairdocs.org/incident/20070723020949A), Jul 23, 2007: Bell 205A1 (N205BR), Happy Camp, CA, Destroyed, 1 fatal. (-23) During a firefighting operation for the U.S. Forest service, the helicopter weas transporting supplies for ground crews via a long line. The helicopter… - [Accident 20070612009459A](https://openairdocs.org/incident/20070612009459A), Jun 12, 2007: Bell UH1B (N2087S), CA, Substantial damage. (-23) During agricultural operations, immediately after taking off from atop of the loader truck, the pilot stated he lost hydraulic pressure to the flight… - [Accident 20060818017679A](https://openairdocs.org/incident/20060818017679A), Aug 18, 2006: Kaman HH43F (N559D), Sullivan Lake, WA, Substantial damage, 1 fatal. (-23) On 08-18-2006, while engaged in logging operations this helicopter and pilot crashed from an altitude of approximately 150 feet onto the log decking… - [Accident 20060401004989A](https://openairdocs.org/incident/20060401004989A), Apr 1, 2006: Bell UH1H (N710WD), CA, Destroyed. (-23) On 04/01/2006 at 1306 PST, helicopter N710WD collided with trees and the ground. The helicopter was destroyed and the pilot stated: the control forces… - [Incident 20050722014799I](https://openairdocs.org/incident/20050722014799I), Jul 22, 2005: Bell 205A1 (N2773H), Storm Lake, IA. (-23) A helicopter operated by summit helicopters, inc. (bhhl) was on a ferry flight when the number 2 hydraulic caution light illuminated. The pilot then… - [Accident 20050425035029A](https://openairdocs.org/incident/20050425035029A), Apr 25, 2005: Bell UH1B (N334WN), Uniontown, WA, Destroyed. (-23) N334WN, a 1962 williams WH-UH1B helicopter was destroyed in a FAR part 137 aerial application accident. This aircraft was operated by leading edge… - [Accident 20040223001789A](https://openairdocs.org/incident/20040223001789A), Feb 23, 2004: Garlik UH1H (N6257P), Ellensburg, WA, Substantial damage. (-23) On February 23, 2004 N6257P, a military surplus 1963 garlick UH1-H helicopter crashed at a logging site located 16 miles north of Ellensburg, Washington… - [Incident 20031021026289I](https://openairdocs.org/incident/20031021026289I), Oct 21, 2003: Bell UH1B (N204GP), Chalmette, LA, Minor damage. (-23) Aircraft had performed 3 pole lifts and was landing for fuel when the back heals of the helicopters skids hit the ground, the aircraft experienced a… - [Accident 20031016034579A](https://openairdocs.org/incident/20031016034579A), Oct 16, 2003: Bell UH1B (N234SJ), Durham, CA, Substantial damage. (-23) Mr. Porter was simulating part 136 spray operations as a demonstration for the 1st grade class of Durham elementary school. The class was on a field trip… - [Accident 20020716022029A](https://openairdocs.org/incident/20020716022029A), Jul 16, 2002: Bell UH1B (N91281), Lorida, FL, Substantial damage. (-23) On July 16, 2002, at about 0940 eastern daylight time, a Bell UH1B helicopter, N91281, operated by colony helicopter, inc., crashed during an aerial… - [Accident 20010731021401A](https://openairdocs.org/incident/20010731021401A), Jul 31, 2001: Bell 205A1 (N205BR), Jackson, WY, No damage. (-23) While hovering to pickup a load of water, the main rotor blades was struck by another helicopters water bucket that had arrived at the same pond for… - [Accident 20010207001069A](https://openairdocs.org/incident/20010207001069A), Feb 7, 2001: Bell UH1H (N205GL), Darby, MT, No damage, 1 fatal. (-23) Re box 21A "other" tail rotor failure suspected. To be confirmed by NTSB teardown analysis. 1. Upon landing with a load of logs on a long line, the pilot… - [Accident 20000524008729A](https://openairdocs.org/incident/20000524008729A), May 24, 2000: N37BA, Ft. Pierce, FL, No damage. (-23) Pilot was conducting agricultural operations at approximately 30 mph and 50 feet above the orange grove. After hearing a loud "pop" noise the helicopter… - [Incident 20000320004029I](https://openairdocs.org/incident/20000320004029I), Mar 20, 2000: Bell UH1B (N63CD), Johnsville, AR, Substantial damage. On March 20, 2000 at approximately 1200 local time, N63CD, a Bell UH-1B, equipped with agriulture dispensing equipment, was relocating back to the re-fueling… - [Incident 19990831027279I](https://openairdocs.org/incident/19990831027279I), Aug 31, 1999: Bell 205A1 (N205BD), Lydia, TX, Minor damage. (-23) Pilot stated he came into dipsite (water pond) with "bambi" bucket on belly hook. He filled bucket on belly hook and had cleared bottom of bucket by… - [Accident 19990824013459A](https://openairdocs.org/incident/19990824013459A), Aug 24, 1999: Bell UH1B (N999SJ), Lost Hills, CA, Substantial damage. 1963 Bell UH-1B helicopter crashed on take-off and sustained substantial damage, other circumstances are unknown.(-23) a BHT-UH1B heli, N99SJ, serial #1025,… - [Accident 19990102004149A](https://openairdocs.org/incident/19990102004149A), Jan 2, 1999: Bell 205A1 (N58126), Van Nuys, CA, Substantial damage. (.19) On January 2, 1999, at 2115 hours pacific standard time, a Bell 205A-1, landed hard during a forced landing in rustic canyon, about 7 miles southwest of… - [Accident 19981214044099A](https://openairdocs.org/incident/19981214044099A), Dec 14, 1998: Bell UH1H (N94NW), Darrington, WA, Destroyed. On December 14, 1998, approximately 1100 pacific standard time, a garlick UH-1H helicopter, N94NW, which is owned by northwest helicopters, and was being… - [Accident 19980919025679A](https://openairdocs.org/incident/19980919025679A), Sep 19, 1998: Bell UH1L (N5107J), Price, UT, Substantial damage. (.19) On September 19, 1998, approximately 1530 mountain daylight time, a Bell UH-1L, N5107J, was substantially damaged following impact with terrain after the… - [Accident 19980618014279A](https://openairdocs.org/incident/19980618014279A), Jun 18, 1998: Bell UH1H (N869W), Coeur D Alene, ID, Substantial damage. Internal failure of the reduction gear box and no continuity between N2 and the powre trubine. Awaiting on teardown. (.4)the pilot stated that he heard a loud… - [Incident 19980608019949I](https://openairdocs.org/incident/19980608019949I), Jun 8, 1998: Bell UH1H (N75462), Marsing, ID, Substantial damage. Noccupied on pad engine running. Turned 90 degrees striking truck with tail rotot. Damaged blades and boom. - [Incident 19980529021909I](https://openairdocs.org/incident/19980529021909I), May 29, 1998: Wsk PZLM18 (N27327), Whiteville, LA, Minor damage. After spraying fields began return to base due low fuel. Engine quit. Tore off wheel ldg. One tank 34th other empty. - [Accident 19980519010199A](https://openairdocs.org/incident/19980519010199A), May 19, 1998: Bell UH1H (N98NW), Hope, ID, Substantial damage. Squeal compressor stalls and smoke, flames from tail pipe. Lost all power and landed in clearing. Report to follow. - [Accident 19980323004139A](https://openairdocs.org/incident/19980323004139A), Mar 23, 1998: Bell 205A1 (N90230), Los Angeles, CA, Destroyed, 4 fatal. Lost tail rotor gear box and tail rotor enroute. Crash landed in autorotation. Found fatigue cracking problem. (.4) during an air ambulance flight in the… - [Incident 19980222001759I](https://openairdocs.org/incident/19980222001759I), Feb 22, 1998: Bell 204B (N204SH), Barstow, CA, Substantial damage. Narrative: on February 21, 1998, at 1715 PST, a Bell helicopter model 204B, serial number 2019, N204SH, made a precautionary landing. The location was in the… - [Accident 19971125034969A](https://openairdocs.org/incident/19971125034969A), Nov 25, 1997: Bell TH1L (N8160G), Canby, OR, Substantial damage. Bell TH-1L acft crashed und unk circ. Canby, OR. (.19)on November 25, 1997, approxiamtely 1120 pacific standard time, a Bell TH-1L rotorcraft, N8160G,… - [Incident 19971021044669I](https://openairdocs.org/incident/19971021044669I), Oct 21, 1997: Bell UH1H (N205WH), Elcajon, CA. Narrative: on October 21, 1997, N250WH, a garlik helicopter model UH-1H, threw a main rotor blade tip weight during a maintenance related ground run-up. The… - [Accident 19970829024769A](https://openairdocs.org/incident/19970829024769A), Aug 29, 1997: Bell UH1B (N22753), Dayville, OR, Substantial damage. Right transmission door seperated. Struck tail rotor. Autoratated hard landing. Cowling improperly installed. - [Accident 19970827024179A](https://openairdocs.org/incident/19970827024179A), Aug 27, 1997: Bell UH1B (N896W), Skykomish, WA, No damage, 1 fatal. Helicopter crashed during logging operation. - [Incident 19970801020909I](https://openairdocs.org/incident/19970801020909I), Aug 1, 1997: Bell UH1B (N64770), Shandon, CA, Minor damage. Narrative: on July 31, 1997, a Bell UH-1B helicopter, N64770, was involved in an approach/line-up incident while conducting fire suppression operations on a… All 94: https://openairdocs.org/engine/lycoming-t-53-series/incidents.md ## Service difficulty reports (9) As reported by operators and repair stations, by the model named in the report. - [SDR H9X2007F00000](https://openairdocs.org/sdr/H9X2007F00000), Dec 1, 2007: HOUSING. DAMAGED. AIRCRAFT WAS RETURNING HOME FROM FLIGHT AND PILOT NOTICED THE PEDALS WERE NOT OPERATING NORMALLY. HE THEN BEGAN CIRCLING THE AIRPORT UNTIL WE DETERMINED THAT TH - [SDR 2007FA0000812](https://openairdocs.org/sdr/2007FA0000812), Sep 19, 2007: QUILL ASSY. WORN. QUILL INTERNAL SPLINES WORN AND DAMAGED IN QUILL TUBE CONTACT AREA - [SDR LS12003F00000](https://openairdocs.org/sdr/LS12003F00000), Jun 6, 2003: SKIN. CRACKED. THE TAILBOOM FIRST 2 UPPER SKINS HAD NUMEROUS CRACKS. UNDER NORMAL OPERATIONS THESE CRACKS WOULD NEVER MATERIALIZE. THE AIRCRAFT HAS BEEN DOING LIFTING WORK. MU - [SDR CA030404003](https://openairdocs.org/sdr/CA030404003), Apr 3, 2003: CASE. CRACKED. (CAN) NOTICED SMALL AMOUNT OF HYDRAULIC FLUID ON HYDRAULIC PUMP CASE. THOUGHT IT WAS LOOSE BUT WAS NOT. REMOVED LINE ATTACHED TO IT AND FOUND SMALL CRACK. - [SDR EHA2002F00002](https://openairdocs.org/sdr/EHA2002F00002), Jul 21, 2002: CIRCUIT BREAKER. FAILED. RIGHT FUEL BOOST PUMP INOPERATIVE. REPLACED CIRCUIT BREAKER. - [SDR EHA2002F00006](https://openairdocs.org/sdr/EHA2002F00006), Jul 18, 2002: PRESSURE SWITCH. INTERMITTENT. MAIN TRANSMISSION OIL PRESSURE SWITCH LIGHT INTERMITTNETLY INOPERATIVE. REPLACED PRESSURE SWITCH. - [SDR QJ5R20017](https://openairdocs.org/sdr/QJ5R20017), Jul 16, 2001: SPAR. MISINSTALLED. DURING MODIFICATION OF THE TAIL BOOM VERTICAL FIN SPAR USING SPAR KIT, THE INSTALLER IMPROPERLY INSTALLED THE HI LOC FASTNERS WHERE THE 90 DEGREE GEARBOX CASTIN - [SDR 20010502CW005](https://openairdocs.org/sdr/20010502CW005), Apr 2, 2001: BLADE. CRACKED. A CRACK WAS NOTICED INSIDE DENT AFT OF THE SPAR ON THE TOP OF THE MAIN ROTOR BLADE. REMOVAL OF PAINT DETERMINED THE CRACK TO BE IN EXCESS OF 6 INCHES LONG. THE - [SDR 99ZZZX3295](https://openairdocs.org/sdr/99ZZZX3295), Aug 5, 1999: GOVERNOR. MISOVERHAULED. DURING ROUTINE OVERAHAUL DISASSEMBLY PROCEDURE, FOUND ONE OF THE TWO 'S' WIRES INSTALLED AT EACH END OF THE FLYWEIGHT PIVOT PIN WAS MISSING AND PRESUMED NOT INS ## STCs that may be installed (OpenAirDocs) (4) Approved for this engine model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has. - [STC SE00585AT](https://openairdocs.org/stc/SE00585AT): Installation of Aeronautical Accessories, Inc. PC Safety Valve Kit. Bell Helicopter Textron Inc. Lists T5313B - [STC SE00028EN](https://openairdocs.org/stc/SE00028EN): Installation of Pratt & Whitney Engine Services Inc. SmartCycle Plus Engine Monitoring System, P/N EMU-K-010-1 on specified T53 engine models. Pratt & Whitney Engine Services Inc. Lists T5309A - [STC SE00029EN](https://openairdocs.org/stc/SE00029EN): Installation of Pratt & Whitney Engine Services Inc. SmartCycle Plus Engine Monitoring System, P/N EMU-K-010-1 on specific T53 engine models. Pratt & Whitney Engine Services Inc. Lists T5313B - [STC SE01440NY](https://openairdocs.org/stc/SE01440NY): Conversion of Honeywell engine model T5313B to Honeywell engine model T5317A utilizing Aero Design, Ltd. conversion instructions C1437.02 dtd 4/30/01. Dart Aerospace Limited. Lists T5313B --- 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.