# Bell UH-1B - Type: Aircraft model (FAA registry) - Registry code: 1181410 - Manufacturer (registry): BELL - Model: UH-1B - Aircraft type: Rotorcraft - Category: Rotorcraft - Engines: 1 · Turbo-shaft - Seats: 6 - Weight class: Up to 12,499 lb - Cruise speed: 103 mph - Certification: Not type certificated - Registered aircraft: 42 - Page: https://openairdocs.org/model/bell-uh-1b Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker. ## ADs that may apply (OpenAirDocs) Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. - [AD 2024-19-17](https://openairdocs.org/ad/2024-19-17): Rotorcraft flight control · Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N… (STC SR03408CH). Effective Oct 11, 2024 - [AD 2022-20-14](https://openairdocs.org/ad/2022-20-14): Main Rotor Gearbox · Bell Textron 204B, 205A, 205A-1 and 20 more. Effective Dec 27, 2022 - [AD 2022-22-12](https://openairdocs.org/ad/2022-22-12): Nose/Tail Landing Gear Structure/Axle · Replacement crosstubes P/N D212-664 (Dart Aerospace STC SR01298NY). Effective Nov 22, 2022 - [AD 2022-21-11](https://openairdocs.org/ad/2022-21-11): Main rotor blades · Bell Textron 204B, 205A, 205A-1 and 11 more. Effective Nov 16, 2022 - [AD 2022-05-10](https://openairdocs.org/ad/2022-05-10): Cabin Equipment/Furnishings · Airbus Helicopters AS332L, AS332L1, AS332L2 and 57 more. Effective Apr 20, 2022 - [AD 2022-06-05](https://openairdocs.org/ad/2022-06-05): Main Rotor System · WSH HH-1K, TH-1F, TH-1L and 11 more. Effective Mar 16, 2022 - [AD 2021-15-14](https://openairdocs.org/ad/2021-15-14): Rotorcraft Tail Boom · California Department of Forestry UH-1H, UH-1F, TH-1L and 39 more. Effective Aug 30, 2021 - [AD 2014-03-10](https://openairdocs.org/ad/2014-03-10): Tail Rotor Control System · JJASPP Engineering Services UH-1H, UH-1F, TH-1L and 35 more. Effective Mar 26, 2014 - [AD 2013-13-06](https://openairdocs.org/ad/2013-13-06): Main rotor head · California Department of Forestry UH-1H, UH-1F, TH-1L and 36 more. Effective Sep 10, 2013 - [AD 2013-13-14](https://openairdocs.org/ad/2013-13-14): Main Rotor Head · JJASPP Engineering Services UH-1H, UH-1F, TH-1L and 33 more. Effective Jul 24, 2013 - [AD 2012-17-10](https://openairdocs.org/ad/2012-17-10): Main Rotor Blades · California Department of Forestry UH-1H, UH-1F, TH-1L and 36 more. Effective Sep 28, 2012 - [AD 2012-14-12](https://openairdocs.org/ad/2012-14-12): Tail Rotor Blades · California Department of Forestry UH-1H, UH-1F, TH-1L and 36 more. Effective Sep 4, 2012 - [AD 2006-19-05](https://openairdocs.org/ad/2006-19-05): Tail rotor (T/R) slider · California Department of Forestry UH-1H, UH-1F, TH-1L and 36 more. Effective Oct 16, 2006 - [AD 2002-20-01](https://openairdocs.org/ad/2002-20-01): TT strap · Overseas Aircraft Support UH-1H, UH-1F, TH-1L and 34 more. Effective Nov 6, 2002 - [AD 2002-13-51](https://openairdocs.org/ad/2002-13-51): Tail Rotor (T/R) Grip · Overseas Aircraft Support UH-1H, UH-1F, TH-1L and 34 more. Effective Aug 19, 2002 - [AD 2002-01-31](https://openairdocs.org/ad/2002-01-31): Retirement Index Number (RIN) for Masts · Overseas Aircraft Support UH-1H, UH-1F, TH-1L and 36 more. Effective Mar 8, 2002 - [AD 2000-15-21 R1](https://openairdocs.org/ad/2000-15-21-R1): Main Rotor Mast Assemblies · Overseas Aircraft Support UH-1H, UH-1F, TH-1L and 33 more. Effective Nov 22, 2000 - [AD 99-25-12](https://openairdocs.org/ad/99-25-12): Tailboom Vertical Fin Spar · California Department of Forestry UH-1H, UH-1F, TH-1L and 31 more. Effective Jan 11, 2000 - [AD 99-07-15](https://openairdocs.org/ad/99-07-15): Tail Rotor Yoke · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 33 more. Effective May 3, 1999 - [AD 97-01-06](https://openairdocs.org/ad/97-01-06): Tail Rotor Slider · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 32 more. Effective Feb 13, 1997 - [AD 96-12-26](https://openairdocs.org/ad/96-12-26): Clean and Inspect Tail Rotor Blade · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 36 more. Effective Sep 23, 1996 - [AD 95-10-08](https://openairdocs.org/ad/95-10-08): Tail Rotor Control System · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 34 more. Effective May 26, 1995 - [AD 94-22-09](https://openairdocs.org/ad/94-22-09): Tail Rotor Driveshaft · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 34 more. Effective Nov 22, 1994 - [AD 92-23-01](https://openairdocs.org/ad/92-23-01): Main Rotor Pillow Blocks · Bell Helicopter Textron 204B, 205A, 205A-1 and 10 more. Effective Apr 23, 1993 - [AD 90-03-10](https://openairdocs.org/ad/90-03-10): Tail Rotor Grips · Arrow Falcon Exporters UH-1H, UH-1F, 204B and 33 more. Effective Oct 18, 1991 - [AD 90-10-05](https://openairdocs.org/ad/90-10-05): Tail Rotor Gearbox · Bell Helicopter Textron TH-1L, UH-1E, UH-1L and 17 more. Effective Jun 5, 1990 - [AD 89-08-06](https://openairdocs.org/ad/89-08-06): Transmission Internal Sump Oil Filter · AST UH-1F, TH-1L, UH-1E and 22 more. Effective Feb 7, 1990 - [AD 88-25-05](https://openairdocs.org/ad/88-25-05): Tail Rotor Grip Assembly · AST UH-1F, 204B, 205A and 25 more. Effective Dec 13, 1988 Historical (superseded or no longer in force): - [AD 2021-15-52](https://openairdocs.org/ad/2021-15-52) (historical): Main Rotor System · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 39 more. Effective Aug 13, 2021 - [AD 80-17-09](https://openairdocs.org/ad/80-17-09) (historical): Main Rotor Straps · Bell Helicopter Textron 204B, 205A-1, 212 and 16 more. Effective Sep 15, 1980 ## Information bulletins (advisory) (3) - [SAIB SW-18-29R1](https://openairdocs.org/saib/SW-18-29R1): Rotorcraft Tail Boom, Attach Structure Failure. Issued Feb 19, 2019 - [SAIB SW-18-29](https://openairdocs.org/saib/SW-18-29) (historical): Rotorcraft Tail Boom, Attach Structure Failure. Issued Oct 1, 2018 - [SAIB SW-12-38](https://openairdocs.org/saib/SW-12-38): Emergency Push Out Window Retention. Issued Jul 30, 2012 ## Registered aircraft (42) - [N1022Q](https://openairdocs.org/aircraft/N1022Q): [American Huey 369 Inc](https://openairdocs.org/faa-owner/AMERICAN%20HUEY%20369%20INC), [Peru, IN](https://openairdocs.org/faa-place/IN/Peru), built 1964, S/N 64-14049 - [N102FW](https://openairdocs.org/aircraft/N102FW): [Sierra Aeronautics LLC](https://openairdocs.org/faa-owner/SIERRA%20AERONAUTICS%20LLC), [Franklin, KY](https://openairdocs.org/faa-place/KY/Franklin), S/N 62-1905 - [N11NE](https://openairdocs.org/aircraft/N11NE): [Northern X Treme Helicopters Inc](https://openairdocs.org/faa-owner/NORTHERN%20X%20TREME%20HELICOPTERS%20INC), [Gridley, CA](https://openairdocs.org/faa-place/CA/Gridley), built 2001, S/N 63-13086 - [N1MX](https://openairdocs.org/aircraft/N1MX): [Wsh LLC](https://openairdocs.org/faa-owner/WSH%20LLC), [Palmer, AK](https://openairdocs.org/faa-place/AK/Palmer), S/N 62-01995 - [N204BS](https://openairdocs.org/aircraft/N204BS): [Intermountain Helicopters Inc](https://openairdocs.org/faa-owner/INTERMOUNTAIN%20HELICOPTERS%20INC), [Cottage Grove, OR](https://openairdocs.org/faa-place/OR/Cottage%20Grove), built 1963, S/N 63-8699 - [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 - [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 - [N204UH](https://openairdocs.org/aircraft/N204UH): [R&R Conner Aviation LLC](https://openairdocs.org/faa-owner/R%26R%20CONNER%20AVIATION%20LLC), [Conner, MT](https://openairdocs.org/faa-place/MT/Conner), built 1962, S/N 62-2034 - [N206NJ](https://openairdocs.org/aircraft/N206NJ): [Pope James D](https://openairdocs.org/faa-owner/POPE%20JAMES%20D), [Clarkston, WA](https://openairdocs.org/faa-place/WA/Clarkston), built 1962, S/N 62-1934 - [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 - [N2956F](https://openairdocs.org/aircraft/N2956F): [Avag Inc](https://openairdocs.org/faa-owner/AVAG%20INC), [Richvale, CA](https://openairdocs.org/faa-place/CA/Richvale), S/N 63-12950 - [N370AS](https://openairdocs.org/aircraft/N370AS): [Jtbam Inc](https://openairdocs.org/faa-owner/JTBAM%20INC), [Lakeside, AZ](https://openairdocs.org/faa-place/AZ/Lakeside), S/N 63-12923 - [N405PD](https://openairdocs.org/aircraft/N405PD): [Powell Kim S](https://openairdocs.org/faa-owner/POWELL%20KIM%20S), [Highlands, TX](https://openairdocs.org/faa-place/TX/Highlands), S/N 64-13930 - [N4237V](https://openairdocs.org/aircraft/N4237V): [Ratledge Thomas D](https://openairdocs.org/faa-owner/RATLEDGE%20THOMAS%20D), [Bethel, AK](https://openairdocs.org/faa-place/AK/Bethel), S/N 261 - [N424NA](https://openairdocs.org/aircraft/N424NA): [Jones Flying Service Inc](https://openairdocs.org/faa-owner/JONES%20FLYING%20SERVICE%20INC), [Biggs, CA](https://openairdocs.org/faa-place/CA/Biggs), S/N 6414021 - [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 - [N4480](https://openairdocs.org/aircraft/N4480): [Twin Cities Aviation Inc](https://openairdocs.org/faa-owner/TWIN%20CITIES%20AVIATION%20INC), [Yuba City, CA](https://openairdocs.org/faa-place/CA/Yuba%20City), S/N 64-13906 - [N45731](https://openairdocs.org/aircraft/N45731): [Magnum Aviation LLC](https://openairdocs.org/faa-owner/MAGNUM%20AVIATION%20LLC), [Goff, KS](https://openairdocs.org/faa-place/KS/Goff), S/N 61-0750 - [N45855](https://openairdocs.org/aircraft/N45855): [Scotts Helicopter Service Inc](https://openairdocs.org/faa-owner/SCOTTS%20HELICOPTER%20SERVICE%20INC), [Le Sueur, MN](https://openairdocs.org/faa-place/MN/Le%20Sueur), S/N 62-1991 - [N46928](https://openairdocs.org/aircraft/N46928): [Scotts Helicopter Services Inc](https://openairdocs.org/faa-owner/SCOTTS%20HELICOPTER%20SERVICES%20INC), [Le Sueur, MN](https://openairdocs.org/faa-place/MN/Le%20Sueur), S/N 61-0712 - [N46969](https://openairdocs.org/aircraft/N46969): [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), S/N 63-8548 - [N5073X](https://openairdocs.org/aircraft/N5073X): [Martins Dusters Inc](https://openairdocs.org/faa-owner/MARTINS%20DUSTERS%20INC), [Colusa, CA](https://openairdocs.org/faa-place/CA/Colusa), built 1963, S/N 63-8622 - [N59HP](https://openairdocs.org/aircraft/N59HP): [Hansen Albert C](https://openairdocs.org/faa-owner/HANSEN%20ALBERT%20C), [Mojave, CA](https://openairdocs.org/faa-place/CA/Mojave), built 1962, S/N 62-1933 - [N600MA](https://openairdocs.org/aircraft/N600MA): [Regenald Michaud Aviation LLC](https://openairdocs.org/faa-owner/REGENALD%20MICHAUD%20AVIATION%20LLC), [Willows, CA](https://openairdocs.org/faa-place/CA/Willows), built 1964, S/N 64-13970 - [N606HF](https://openairdocs.org/aircraft/N606HF): [Agriforrestal Applications Inc](https://openairdocs.org/faa-owner/AGRIFORRESTAL%20APPLICATIONS%20INC), [Cape Coral, FL](https://openairdocs.org/faa-place/FL/Cape%20Coral), S/N 638606 - [N6180A](https://openairdocs.org/aircraft/N6180A): [Jones Aviation Inc](https://openairdocs.org/faa-owner/JONES%20AVIATION%20INC), [Biggs, CA](https://openairdocs.org/faa-place/CA/Biggs), built 1962, S/N 62-1994 - [N62767](https://openairdocs.org/aircraft/N62767): [Aquila Helicopters LLC](https://openairdocs.org/faa-owner/AQUILA%20HELICOPTERS%20LLC), [Elliston, MT](https://openairdocs.org/faa-place/MT/Elliston), S/N 62-1915 - [N64770](https://openairdocs.org/aircraft/N64770): [Premier Aircraft Services LLC](https://openairdocs.org/faa-owner/PREMIER%20AIRCRAFT%20SERVICES%20LLC), [Bakersfield, CA](https://openairdocs.org/faa-place/CA/Bakersfield), built 1964, S/N 63-8721 - [N8043Z](https://openairdocs.org/aircraft/N8043Z): [Magnum Aviation LLC](https://openairdocs.org/faa-owner/MAGNUM%20AVIATION%20LLC), [Goff, KS](https://openairdocs.org/faa-place/KS/Goff), S/N 60-3552 - [N806SB](https://openairdocs.org/aircraft/N806SB): [Scotts Helicopter Service](https://openairdocs.org/faa-owner/SCOTTS%20HELICOPTER%20SERVICE), [Le Sueur, MN](https://openairdocs.org/faa-place/MN/Le%20Sueur), built 1964, S/N 64-14023 - [N832M](https://openairdocs.org/aircraft/N832M): [Starks Daniel](https://openairdocs.org/faa-owner/STARKS%20DANIEL), [Dubois, WY](https://openairdocs.org/faa-place/WY/Dubois), built 1963, S/N 62-2084 - [N841M](https://openairdocs.org/aircraft/N841M): [Rock Creek Leasing LLC](https://openairdocs.org/faa-owner/ROCK%20CREEK%20LEASING%20LLC), [Sapulpa, OK](https://openairdocs.org/faa-place/OK/Sapulpa), built 1962, S/N 62-1956 - [N88976](https://openairdocs.org/aircraft/N88976): [R Consulting & Sales Inc](https://openairdocs.org/faa-owner/R%20CONSULTING%20%26%20SALES%20INC), [Carson City, NV](https://openairdocs.org/faa-place/NV/Carson%20City), S/N 64-14009 - [N893PM](https://openairdocs.org/aircraft/N893PM): [Porter Flying Service](https://openairdocs.org/faa-owner/PORTER%20FLYING%20SERVICE), [Durham, CA](https://openairdocs.org/faa-place/CA/Durham), built 1962, S/N 62-1923 - [N91320](https://openairdocs.org/aircraft/N91320): [Avag Inc](https://openairdocs.org/faa-owner/AVAG%20INC), [Richvale, CA](https://openairdocs.org/faa-place/CA/Richvale), built 1962, S/N 62-1887 - [N9434A](https://openairdocs.org/aircraft/N9434A): [Pennsylvania College Of Technology](https://openairdocs.org/faa-owner/PENNSYLVANIA%20COLLEGE%20OF%20TECHNOLOGY), [Williamsport, PA](https://openairdocs.org/faa-place/PA/Williamsport), S/N 63-8664 - [N98F](https://openairdocs.org/aircraft/N98F): [Prescott Gordon F](https://openairdocs.org/faa-owner/PRESCOTT%20GORDON%20F), [Princeton, WV](https://openairdocs.org/faa-place/WV/Princeton), built 1962, S/N 62-1968 - [N99021](https://openairdocs.org/aircraft/N99021): [Magnum Aviation LLC](https://openairdocs.org/faa-owner/MAGNUM%20AVIATION%20LLC), [Goff, KS](https://openairdocs.org/faa-place/KS/Goff), built 1965, S/N 64-13949 - [N99478](https://openairdocs.org/aircraft/N99478): [Vf99478 LLC](https://openairdocs.org/faa-owner/VF99478%20LLC), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1963, S/N 63-8636 - [N99675](https://openairdocs.org/aircraft/N99675): [Alaska Remote Outfitters LLC](https://openairdocs.org/faa-owner/ALASKA%20REMOTE%20OUTFITTERS%20LLC), [Kenai, AK](https://openairdocs.org/faa-place/AK/Kenai), built 1963, S/N 624601 ## NTSB investigations (58, 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 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 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 ERA22FA279](https://openairdocs.org/ntsb/ERA22FA279), Jun 22, 2022: Bell UH-1B (N98F), Amherstdale, WV, destroyed, 6 fatal. Probable cause: the operator’s failure to adequately inspect the former military turbine powered helicopter, which allowed an engine issue to progress and result in a loss of engine power and a subsequent loss of… - [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 WPR15LA159](https://openairdocs.org/ntsb/WPR15LA159), May 8, 2015: Garlick UH-1B (N46969), Kettle Falls, WA, substantial damage. Probable cause: A total loss of engine power due to foreign object (towel) ingestion. Contributing to the accident was maintenance personnel’s inadequate postmaintenance inspection of the engine. - [NTSB WPR13FA411](https://openairdocs.org/ntsb/WPR13FA411), Sep 16, 2013: Bell UH 1B (N204UH), Detroit, OR, substantial damage, 1 fatal. Probable cause: The fatigue failure of the upper two tailboom attachment points, which resulted in the tailboom separating from the fuselage during logging operations. Contributing to the accident was poor… - [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 SEA08LA043](https://openairdocs.org/ntsb/SEA08LA043), Dec 5, 2007: Bell UH-1B (N46969), Ennis, MT, substantial damage. Probable cause: The loss of collective control friction during takeoff that resulted in a collective bounce oscillation. Contributing to the accident was the pilot's failure to maintain aircraft control during the… - [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 FTW04WA173](https://openairdocs.org/ntsb/FTW04WA173), Jun 12, 2004: Bell UH-1B (N64CC), Las Bocas, Mexico, substantial damage - [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 LAX00LA239](https://openairdocs.org/ntsb/LAX00LA239), Jun 23, 2000: Bell UH-1B (N807SB), Arbuckle, CA, destroyed, 1 fatal. Probable cause: the partial failure of the tail rotor pitch change control rod that resulted in an attempted run-on landing in dark night conditions. - [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 LAX98LA108](https://openairdocs.org/ntsb/LAX98LA108), Mar 7, 1998: Bell UH-1B (N204DR), Hollister, CA, destroyed. Probable cause: The failure of the maintenance personnel to recognize and repair the chafed area of the tail rotor driveshaft, which resulted in an in-flight separation of the tail fin and hub assembly. - [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 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 ATL97LA002](https://openairdocs.org/ntsb/ATL97LA002), Oct 12, 1996: Bell UH-IB (N846MC), Bennettsville, SC, destroyed. Probable cause: the pilot's improper planning/decision, which resulted in fuel exhaustion and loss of engine power due to an inadequate supply of usable fuel. A factor relating to the accident was: an inoperative… - [NTSB MIA96LA166](https://openairdocs.org/ntsb/MIA96LA166), Jun 28, 1996: Bell UH-1B (N9846F), Lorida, FL, substantial damage. Probable cause: failure of company maintenance personnel to properly torque the tail rotor 90 degree gear box mounting bolts during installation, which resulted in failure of the mounting studs due to bending… - [NTSB ATL94LA180](https://openairdocs.org/ntsb/ATL94LA180), Sep 29, 1994: Bell UH-1B (N41870), Ozark, AL, substantial damage. Probable cause: THE FAILURE OF THE ENGINES' MAIN BEARINGS BECAUSE OF A LACK OF LUBRICATION. A FACTOR WAS THE HEAVILY WOODED TERRAIN. - [NTSB BFO94LA159](https://openairdocs.org/ntsb/BFO94LA159), Aug 31, 1994: Bell UH-1B (N204JB), Carrabasset, ME, substantial damage. Probable cause: Fracture failure of the tail rotor drive intermediate gearbox. - [NTSB SEA94LA183](https://openairdocs.org/ntsb/SEA94LA183), Jul 17, 1994: Bell UH-1B (N9645A), Pilot Rock, OR, substantial damage. Probable cause: DIRECTIONAL CONTROL WAS NOT MAINTAINED FOR UNDETERMINED REASONS. - [NTSB SEA93LA207](https://openairdocs.org/ntsb/SEA93LA207), Sep 23, 1993: Bell UH-1B (N3979C), Pierce, ID, substantial damage. Probable cause: SEPARATION OF THE 90 DEGREE GEARBOX AFTER FATIGUE FAILURE OF THE GEARBOX ATTACH BOLTS. FACTORS INCLUDE HILLY/MOUNTAINOUS TERRAIN. - [NTSB BFO91DOA01](https://openairdocs.org/ntsb/BFO91DOA01), Jul 1, 1991: Bell UH-1B (N91348), Iaeger, WV, substantial damage. Probable cause: THE LOSS OF ENGINE POWER FOR UNDETERMINED REASONS, WHILE OPERATING OVER UNSUITABLE TERRAIN. - [NTSB ATL91LA102](https://openairdocs.org/ntsb/ATL91LA102), May 29, 1991: Bell UH-1B (N9650N), Lake Seminole, GA, destroyed. Probable cause: THE FAILURE OF THE PILOT TO MAINTAIN CLEARANCE FROM THE SURFACE. - [NTSB ANC91LA058](https://openairdocs.org/ntsb/ANC91LA058), May 21, 1991: Bell UH-1B (N87966), Dog Fish Bay, AK, destroyed, 1 fatal. Probable cause: THE PILOT'S EXCEEDING THE GROSS WEIGHT OF THE AIRCRAFT AND INADEQUATE SUPERVISION BY COMPANY MANAGEMENT. CONTRIBUTING TO THE ACCIDENT WAS THE HIGH VEGETATION. - [NTSB MIA91LA113](https://openairdocs.org/ntsb/MIA91LA113), Mar 12, 1991: Bell UH-1B (N9687R), Vero Beach, FL, substantial damage. Probable cause: IMPROPER MAINTENANCE ADJUSTMENT BY COMPANY MAINTENANCE PERSONNEL RESULTING IN OVERTORQUE OF A TAILBOOM ATTACH BOLT WHICH ALLOWED THE TAILBOOM TO SHIFT. THIS DISENGAGED THE TAIL ROTOR DRIVE SHAFT AT A… - [NTSB LAX90DXQ04](https://openairdocs.org/ntsb/LAX90DXQ04), Aug 14, 1990: Bell UH-1B (N64789), Bieber, CA, substantial damage. Probable cause: THE PILOT'S FAILURE TO MAINTAIN AIRCRAFT CONTROL WHEN INTENTIONALLY SLOWING HIS AIRCRAFT TO OFF LOAD WATER ON FIRE. CONTRIBUTING TO THE ACCIDENT WAS THE PILOT'S FAILURE TO ARM AND RELEASE THE… - [NTSB SEA90TL#03](https://openairdocs.org/ntsb/SEA90TL%2303), Jun 21, 1990: Bell UH-1B (N99634), Yakima, WA, substantial damage - [NTSB MKC90DCQ02](https://openairdocs.org/ntsb/MKC90DCQ02), May 6, 1990: Bell UH-1B (N8142W), Ulysses, KS, destroyed, 1 fatal. Probable cause: THE PILOT FAILED TO MAINTAIN PROPER ROTOR RPM, WHILE MANEUVERING OVER A HIGH OBSTRUCTION (POWER LINE) AT THE END OF A SWATH RUN, WHICH RESULTED IN AN INADVERTENT DESCENT & COLLISION WITH THE TERRAIN.… - [NTSB ATL89DKG06](https://openairdocs.org/ntsb/ATL89DKG06), Sep 29, 1989: Bell UH-1B (N840MC), Plains, GA, destroyed, 2 fatal. Probable cause: IMPROPER MODIFICATION OF THE HELICOPTER BY THE COMPANY/OPERATOR, AND FAILURE OF THE SPRAY BOOM, WHICH RESULTED IN MAST BUMPING, AND SUBSEQUENT FAILURE OF THE MAIN ROTOR ASSEMBLY. - [NTSB LAX88DVA02](https://openairdocs.org/ntsb/LAX88DVA02), Mar 14, 1988: Bell UH-1B (N59368), Arvin, CA, destroyed - [NTSB ATL87LA121](https://openairdocs.org/ntsb/ATL87LA121), Apr 21, 1987: Bell UH-1B (N88987), Bay Minette, AL, destroyed - [NTSB LAX86FVA10](https://openairdocs.org/ntsb/LAX86FVA10), Jun 30, 1986: Bell UH-1B (N64789), Le Grand, CA, substantial damage - [NTSB LAX86DVA06](https://openairdocs.org/ntsb/LAX86DVA06), Apr 16, 1986: Bell UH-1B (N910PD), Chowchilla, CA, destroyed - [NTSB MIA86LA138](https://openairdocs.org/ntsb/MIA86LA138), Apr 14, 1986: Bell UH-1B (N4242T), North Port, FL, substantial damage - [NTSB FTW85FA310](https://openairdocs.org/ntsb/FTW85FA310), Aug 8, 1985: Bell UH-1B (N1385W), Saint James, LA, destroyed, 1 fatal - [NTSB SEA85LA151](https://openairdocs.org/ntsb/SEA85LA151), Jun 25, 1985: Bell UH-1B (N4991D), Hoquiam, WA, no damage, 1 fatal - [NTSB SEA85FA134](https://openairdocs.org/ntsb/SEA85FA134), Jun 11, 1985: Bell UH-1B (N99676), Juneau, AK, destroyed, 1 fatal - [NTSB LAX85LA105](https://openairdocs.org/ntsb/LAX85LA105), Jan 11, 1985: Bell 204 (N99021), Snelling, CA, substantial damage - [NTSB ATL84LA226](https://openairdocs.org/ntsb/ATL84LA226), Jul 20, 1984: Bell 204 UH 1B (N91307), Tams, WV, destroyed - [NTSB LAX84LA273](https://openairdocs.org/ntsb/LAX84LA273), Apr 29, 1984: Bell UH-1B (N57HP), Salinas, CA, destroyed - [NTSB SEA83FA133](https://openairdocs.org/ntsb/SEA83FA133), Jun 24, 1983: Garlick UH-1B/204 (N5598G), Fossil, OR, destroyed - [NTSB LAX83LA022](https://openairdocs.org/ntsb/LAX83LA022), Oct 28, 1982: Bell UH-1B (N15FC), Delano, CA, destroyed All 58: https://openairdocs.org/model/bell-uh-1b/ntsb.md ## FAA accident and incident reports (60, 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 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 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 20220622023339A](https://openairdocs.org/incident/20220622023339A), Jun 22, 2022: Bell UH-1B (N98F), Amherstdale, WV, Destroyed, 6 fatal. On June 22, 2022, about 1645 eastern daylight time, a Bell UH-1B helicopter, [privacy data omitted], was destroyed when it was involved in an accident in… - [Accident 20170621008579A](https://openairdocs.org/incident/20170621008579A), Jun 21, 2017: Bell UH-1B (N6180A), Williams, CA, Substantial damage. Pilot struck wires during field application - [Accident 20150507006299A](https://openairdocs.org/incident/20150507006299A), May 7, 2015: Garlik GARLIK-UH1B (N46969), Orient, WA, Substantial damage. The pilot started logging at 1300 local and had flown one fuel cycle (1HR 20 mins of fuel plus an additional 300 lbs. Of fuel). The pilot was 45 minutes into… - [Accident 20130916018889A](https://openairdocs.org/incident/20130916018889A), Sep 16, 2013: Bell UH-1B (N204UH), Detroit, OR, Destroyed, 1 fatal. After releasing an external load of logs in a 200 foot hover, the entire tail boom separated from the fuselage of N204UH. The helicopter immediately crashed… - [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… - [Accident 20071205828469A](https://openairdocs.org/incident/20071205828469A), Dec 5, 2007: Bell UH1B (N46969), Ennis, MT, Substantial damage. (-23) On December 5, 2007, at 1600 mountain time, a garlick UH-1B, N46969, registered to r & r conner aviation LLC, made a hard landing at 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 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 20000623008869A](https://openairdocs.org/incident/20000623008869A), Jun 23, 2000: Bell UH1B (N807SB), Williams, CA, No damage, 1 fatal. (-23) Heli crashed approx. 1/2 mile from departure point, the heli was operated by pacific valley aviation under part 137 14 CFR as a serial application… - [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… - [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 19980307002829A](https://openairdocs.org/incident/19980307002829A), Mar 7, 1998: Bell UH1B (N204DR), Hollister, CA, Destroyed. Tail rotor gear box seperated during spray run. Spiralled to ground. (.4)the pilot initiated a right turn, then he felt and heard a thump. He lowered 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. - [Accident 19970827024169A](https://openairdocs.org/incident/19970827024169A), Aug 27, 1997: Bell UH1B (N482SA), Manila, AR, Destroyed, 1 fatal. During aerial application crashed. (-23) approximately 10:30 am I was called in reference to an accident 3 miles north of Manila, AR. Upon arriving on site I… - [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… - [Accident 19970610013749A](https://openairdocs.org/incident/19970610013749A), Jun 10, 1997: Bell UH1B (N888SJ), Huron, CA, Destroyed. Partial power loss field spraying. Autorotated and landed hard. A main rotor blade severed the tailboom. Groundfire - [Accident 19970311012059A](https://openairdocs.org/incident/19970311012059A), Mar 11, 1997: Bell UH1B (N70696), Labelle, FL, Destroyed. Test flight. Lifted to 100FT AGL hover. Loud bang. Impacted. Parts hit vehicle. Main rotor seperated fatigue crack. (-23) see inspector statements dated… - [Accident 19961012032179A](https://openairdocs.org/incident/19961012032179A), Oct 12, 1996: Bell UH1B (N846MC), Bennettsville, SC, Destroyed. Collided with ground during ag ops. Fuel pump inop. Fuel starvation. Tail rotor hit, then nose hit a stump. (-23) aircraft was reportedly applying chemicals… - [Accident 19960628015649A](https://openairdocs.org/incident/19960628015649A), Jun 28, 1996: Bell UH1B (N9846F), Lorida, FL, Substantial damage. Grinding noise in tail. Gear box separated. Spun. Main rotors hit ground landing. Gear box installed 95HRS prior. - [Incident 19950617020649I](https://openairdocs.org/incident/19950617020649I), Jun 17, 1995: Bell UH1B (N600MA), Lincoln, MT. Lost power during logging operation engine bearings failed due oil starvation. - [Incident 19950527016979I](https://openairdocs.org/incident/19950527016979I), May 27, 1995: Bell UH1B (N843M), Gridley, CA, Minor damage. Narrative: on may 27, 1995, at 1513 pdst, N843M, a garlick (Bell) UH1B helicopter, registered to avag, inc., experienced a loss of engine power during take-off… - [Accident 19940929035369A](https://openairdocs.org/incident/19940929035369A), Sep 29, 1994: Bell UH1B (N41870), Ozark, AL, Substantial damage. Chip light on. Low rotor RPM. Autorotated to field but struck trees. Metal in gearbox. Bearing failure. Lacked lube - [Accident 19940831024429A](https://openairdocs.org/incident/19940831024429A), Aug 31, 1994: Bell UH1B (N204JB), Carrabasset, ME, Substantial damage. External load ops crashed on takeoff. Autorotated prior impact. Tail rotor gear box separated due to overload. - [Accident 19940717018739A](https://openairdocs.org/incident/19940717018739A), Jul 17, 1994: Bell UH1B (N9645A), Pilot Rock, OR, Substantial damage. Lost directional control on external hoist. Yaw and rotation until impact. - [Accident 19930923036609A](https://openairdocs.org/incident/19930923036609A), Sep 23, 1993: Bell UH1B (N3979C), Pierce, ID, Substantial damage. 90 Degree gear box separated from helicopter. Landed hard during run on landing. Chopped tail. Attach bolts broke. - [Incident 19930128008999I](https://openairdocs.org/incident/19930128008999I), Jan 28, 1993: Bell UH1B (N91320), Hamilton City, CA, Minor damage. Experienced engine power loss while conducting agricultural operation. Emergency auto rotation to field. - [Accident 19910701025669A](https://openairdocs.org/incident/19910701025669A), Jul 1, 1991: Bell UH1B (N91348), Iaeger, WV, Substantial damage. Allowed rotor speed to decay whiel spraying powerline right of way. Was too low to regain RPM. Crashed in trees. - [Accident 19910529017889A](https://openairdocs.org/incident/19910529017889A), May 29, 1991: Bell UH1B (N9650N), Lake Seminole, GA, Destroyed. Struck a piling in water of lake flying just off surface. Low ceiling fog and glassy water. Flipped inverted. Sank. - [Accident 19910521016719A](https://openairdocs.org/incident/19910521016719A), May 21, 1991: Bell UH1B (N87966), Dog Fish Bay, AK, Destroyed, 1 fatal. Ground crewman choker setter hooked long line to log 1600 lbs over gross. Ripped out helicopter belly causing crash - [Accident 19910312021829A](https://openairdocs.org/incident/19910312021829A), Mar 12, 1991: Bell UH1B (N9687R), Vero Beach, FL, Substantial damage. Loud noise and right yaw. Autorotated into trees. Tail boom attach bolt stripped. Boom shifted. Uncoupled shaft. - [Incident 19900811048909I](https://openairdocs.org/incident/19900811048909I), Aug 11, 1990: Bell UH1B (N1386L), Pixley, CA. Engine explosion. Entered autorotation to a field. Had to put out engine fire. - [Accident 19900506013999A](https://openairdocs.org/incident/19900506013999A), May 6, 1990: Bell UH1B (N8142W), Ulysses, KS, Substantial damage, 1 fatal. Wreckage shows evidence of mast bumping and low rotor RPM occurred prior loss of control crash and burn. - [Accident 19890929037199A](https://openairdocs.org/incident/19890929037199A), Sep 29, 1989: Bell UH1B (N840MC), Plains, GA, Destroyed, 2 fatal. Helicopter came apart inflight. Found evidence of mast bumping which failed main rotors. - [Incident 19880422020549I](https://openairdocs.org/incident/19880422020549I), Apr 22, 1988: Bell UH1B (N2295B), Brooklyn, NY, Minor damage. Noticed directional instability on climb. Emergency landing. Pitch change link to tail rotor blade had disconnected - [Accident 19880314026319A](https://openairdocs.org/incident/19880314026319A), Mar 14, 1988: Bell UH1B (N59368), Arvin, CA, Destroyed. Hit powerlines on a precautionary landing. Fuel boost warning light on. Impacted ground. Generator switch was off. - [Accident 19870421061429A](https://openairdocs.org/incident/19870421061429A), Apr 21, 1987: Bell UH1B (N88987), Bay Minette, GA, Destroyed. The helicopter lost engine power during hover, landed in a marsh and rolled over. Turbine compressor had failed. - [Accident 19860416012089A](https://openairdocs.org/incident/19860416012089A), Apr 16, 1986: Bell UH1B (N910PD), Chowchilla, CA, Destroyed. The engine lost power and the helicopter rolled over during an emergency landing. No oil in transmission. - [Accident 19860414015329A](https://openairdocs.org/incident/19860414015329A), Apr 14, 1986: Bell UH1B (N4242T), North Port, FL, Substantial damage. Engine failed shortly after takeoff and crash occurred during auto rotation landing. - [Incident 19860412021889I](https://openairdocs.org/incident/19860412021889I), Apr 12, 1986: Bell UH1B (N3979C), Turlock, CA, Minor damage. Following spray run aircraft lost RPM. Damage to cross tube and rotor. Hot section had failed. - [Accident 19850808037719A](https://openairdocs.org/incident/19850808037719A), Aug 8, 1985: Bell UH1B (N1385W), St James, LA, Destroyed. Engine failed in hover, aircraft impacted ground. Fatigue failure of compressor led to failure of turbine section. - [Accident 19850625057139A](https://openairdocs.org/incident/19850625057139A), Jun 25, 1985: Bell UH1B (N4991D), Hoquiam, WA, 1 fatal. While hovering during transport of large blocks of wood the sling broke. Fatal head injury to person on the ground. - [Accident 19850611023879A](https://openairdocs.org/incident/19850611023879A), Jun 11, 1985: Bell UH1B (N99676), Juneau, AK, Destroyed. During overhaul, metal shavings prevented proper assembly of compressor rotor. Engine failed. Aircraft hit trees. - [Accident 19850110001139A](https://openairdocs.org/incident/19850110001139A), Jan 10, 1985: Bell UH1B (N99021), Snelling, CA, Substantial damage. Engine at idle, pilot cleaning windshield. Aircraft slid off nurse truck as pilot reentered cockpit too late. - [Accident 19840720034109A](https://openairdocs.org/incident/19840720034109A), Jul 20, 1984: Bell UH1B (N91307), Tams, WV, Destroyed. Tried to climbout of small clearing with external spray load and over gross. Unable to get transational lift. - [Accident 19840429016609A](https://openairdocs.org/incident/19840429016609A), Apr 29, 1984: Bell UH1B (N57HP), Salinas, CA, Destroyed. Helicopter pilot tried to level off after dive over wires. Helicopter sank into ground as pilot attempted pullup. All 60: https://openairdocs.org/model/bell-uh-1b/incidents.md ## Service difficulty reports (20) As reported by operators and repair stations, by the model named in the report. - [SDR UPX2009F00004](https://openairdocs.org/sdr/UPX2009F00004), May 31, 2009: CONTROL SERVO. LEAKING. ON STARTUP FOR A FLIGHT, MECHANIC NOTICED LARGE PUDDLE OF HYD FLUID UNDER FUSELAGE. CLOSER INSPECTION REVEALED THE LT CYCLIC SERVO WAS LEAKING A LARGE AMOUNT OF - [SDR UPX2009F00003](https://openairdocs.org/sdr/UPX2009F00003), May 31, 2009: SADDLE. CRACKED. ON DAILY INSPECTION, FOUND LT FWD OTBD LANDING GEAR SADDLE CRACKED LONGITUDINALLY AT FILLET AREA. REPLACED SADDLE AND RETURNED TO SERVICE. (K) - [SDR H5O2008F00000](https://openairdocs.org/sdr/H5O2008F00000), Dec 5, 2007: LINER. WORN. PILOT EXPERIENCED COLLECTIVE BOUNCE ON TAKEOFF. INSPECTION OF COLLECTIVE LINERS SHOWED SUFFICIENT AMOUNT OF LINER REMAINING IN THE WEAR AREA. WITH FURTHER INSPE - [SDR 2008FA0000031](https://openairdocs.org/sdr/2008FA0000031), Dec 5, 2007: LINER. WORN. PILOT EXPERIENCED COLLECTIVE BOUNCE ON TAKEOFF. INSPECTION OF COLLECTIVE LINERS SHOWED A SUFFICIENT AMOUNT OF LINER REMAINING IN THE WEAR AREA. WITH FURTHER INS - [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 AU000186](https://openairdocs.org/sdr/AU000186), Jan 25, 2000: BLADE. FAILED. (AUS) THIRD STAGE COMPRESSOR DISC AND BLADES DESTROYED. DOWNSTREAM COMPRESSOR DAMAGE. NO DAMAGE TO THE FIRST TWO STAGES. - [SDR 98ZZZX2792](https://openairdocs.org/sdr/98ZZZX2792), Jun 29, 1998: REGULATOR. FAILED. VOLTAGE REGULATOR WILL NOT HOLD VOLTAGE. REMOVED FROM AIRCRAFT AND SENT TO REPAIR. - [SDR 97ZZZX2776](https://openairdocs.org/sdr/97ZZZX2776), May 27, 1997: FIN SPAR. CRACKED. DURING ROUTINE VISUAL INSPECTION WHILE REFUELING, CRACK IN TAILBOOM SPAR CAP WAS DETECTED. MECHANIC STATED NO CRACK WAS NOTED DURING PRE-FLIGHT INDICATING IT FO - [SDR 97ZZZX1991](https://openairdocs.org/sdr/97ZZZX1991), Mar 13, 1997: GRIP. DEFECTIVE. BUSHING FOR PITCH LINK DOES NOT PROTRUDE FLUSH ON BACK SIDE OF GRIP EAR. THEREFORE, SINGLE STEEL WASHER UNDER NUT OF PC LINK BOLT SITS OVER RECESS AND CAN 'DISH - [SDR 97ZZZX1939](https://openairdocs.org/sdr/97ZZZX1939), Mar 13, 1997: BEARING. SPALLED. SPALLING ON BALLS AND OUTER RACE OF BEARING. THIS BEARING IS USED IN SEVERAL DIFFERENT APPLICATIONS IN THE DRIVE TRAIN OF BELL HELICOPTERS. - [SDR GJQR0000098](https://openairdocs.org/sdr/GJQR0000098), Oct 22, 1996: BLADE. DEBONDED. C/W ASB 204-96-48 DUE TO POSSIBILITY OF DEBONDING OF THE MAIN SPAR LEADING EDGE DOUBLER. SEE AD 96-12-26. REPLACED WITH NEW BLADES FROM CSF STOCK. (X) - [SDR GJQR0000097](https://openairdocs.org/sdr/GJQR0000097), Oct 22, 1996: BLADE. DEBONDED. C/W ASB 204-96-48 DUE TO POSSIBILITY OF DEBONDING OF THE MAIN SPAR LEADING EDGE DOUBLER. SEE AD 96-12-26. REPLACED WITH NEW BLADES FROM CSF STOCK. (X) - [SDR UNKN0000096](https://openairdocs.org/sdr/UNKN0000096), Oct 17, 1996: BLADE. CORRODED. PART IS CORRODED. 4TH SET FROM BHT - REORDERED 5TH SET FROM BHT. - [SDR UNKN0000095](https://openairdocs.org/sdr/UNKN0000095), Oct 17, 1996: BLADE. CORRODED. PART IS CORRODED. 4TH SET FROM BHT - REORDERED 5TH SET FROM BHT. - [SDR UNKN0000094](https://openairdocs.org/sdr/UNKN0000094), Oct 16, 1996: BLADE. CORRODED. PART IS CORRODED. 3RD SET FROM BHT - REORDERED 4TH SET FROM BHT. (X) - [SDR UNKN0000093](https://openairdocs.org/sdr/UNKN0000093), Oct 16, 1996: BLADE. CORRODED. PART IS CORRODED. 3RD SET FROM BHT - REORDERED 4TH SET FROM BHT. - [SDR UNKN0000092](https://openairdocs.org/sdr/UNKN0000092), Oct 10, 1996: BLADE. CORRODED. PART IS CORRODED. 2ND SET FROM BHT - REORDERED 3RD SET FROM BHT. (X) - [SDR UNKN0000091](https://openairdocs.org/sdr/UNKN0000091), Oct 10, 1996: BLADE. CORRODED. PART IS CORRODED. 2ND SET RECEIVED FORM BHT - REORDERED 3RD SET FROM BHT. (X) - [SDR UNKN0000090](https://openairdocs.org/sdr/UNKN0000090), Oct 10, 1996: BLADE. CORRODED. PART IS CORRODED. RECEIVED FROM BHT AS IS - REORDERED 2ND SET FROM BHT. (X) - [SDR UNKN0000089](https://openairdocs.org/sdr/UNKN0000089), Oct 10, 1996: BLADE. CORRODED. PART IS CORRODED. REPLACED WITH BLADE FROM BHT. (X) ## The same model under other registry codes Amateur-built copies and renamed makers get their own codes. - [Garlick Helicopters UH-1B](https://openairdocs.org/model/garlick-helicopters-uh-1b): 3 registered aircraft, registry code 3740001 - [Hawkins & Powers UH-1B](https://openairdocs.org/model/hawkins-powers-uh-1b): 2 registered aircraft, registry code 1280001 - [Bell-Colonial UH-1B](https://openairdocs.org/model/bell-colonial-uh-1b): 1 registered aircraft, registry code 118141A - [Bell-Sw Florida Avn UH-1B](https://openairdocs.org/model/bell-sw-florida-avn-uh-1b): 1 registered aircraft, registry code 118141B - [Williams Helicopter UH-1B](https://openairdocs.org/model/williams-helicopter-uh-1b): 1 registered aircraft, registry code 9790871 - [Bell / Colony Services UH-1B](https://openairdocs.org/model/bell-colony-services-uh-1b): 0 registered aircraft, registry code 118141D - [Richards Heavylift Helo UH-1B](https://openairdocs.org/model/richards-heavylift-helo-uh-1b): 0 registered aircraft, registry code 118141G - [S M & T UH-1B](https://openairdocs.org/model/s-m-t-uh-1b): 0 registered aircraft, registry code 7700000 - [Wilco UH-1B](https://openairdocs.org/model/wilco-uh-1b): 0 registered aircraft, registry code 9680102 --- 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.