# Bell 47G-4A - Type: Aircraft model (FAA registry) - Registry code: 1181031 - Manufacturer (registry): BELL - Model: 47G-4A - Aircraft type: Rotorcraft - Category: Rotorcraft - Engines: 1 · Turbo-shaft - Seats: 3 - Weight class: Up to 12,499 lb - Cruise speed: 78 mph - Certification: Type certificated - Data sheet: [TCDS 2H3](https://openairdocs.org/tcds/2H3) (OpenAirDocs) - Holder: Scott's-Bell 47 Inc - Registered aircraft: 20 - Page: https://openairdocs.org/model/bell-47g-4a 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 2023-11-07](https://openairdocs.org/ad/2023-11-07): Ground Proximity System · Airbus Helicopters 47, 206, 210 and 237 more. Effective Jun 22, 2023 - [AD 2009-12-01](https://openairdocs.org/ad/2009-12-01): Main rotor blade box beam clip (clip) · Scotts-Bell 47 47, 47B, 47B3 and 21 more. Effective Jun 29, 2009 - [AD 2005-21-04](https://openairdocs.org/ad/2005-21-04): Weld assembly scissors bracket · Revise mast controls and remove stabilizer bar and install… (Scott's-Bell 47 STC SH2772SW). Effective Nov 21, 2005 - [AD 2001-17-17](https://openairdocs.org/ad/2001-17-17): Main Rotor Blade Grip Threads · Scotts-Bell 47 47B, 47B3, 47D and 19 more. Effective Oct 3, 2001 - [AD 98-07-09](https://openairdocs.org/ad/98-07-09): Stabilizer Bar Damper Link Assembly · Scotts-Bell 47 47B, 47B3, 47D and 19 more. Effective May 6, 1998 - [AD 96-06-12](https://openairdocs.org/ad/96-06-12): Inspect Tail Rotor Blade & Abrasion Strip · Scotts-Bell 47 47B, 47B3, 47D and 19 more. Effective May 29, 1996 - [AD 91-20-10](https://openairdocs.org/ad/91-20-10): Main Rotor Grip · Scotts-Bell 47 47G-2, 47G-2A, 47G-2A-1 and 11 more. Effective Nov 14, 1991 - [AD 85-08-03](https://openairdocs.org/ad/85-08-03): Tail Rotor Blade Assemblies · Scotts-Bell 47 47, 47B, 47B3 and 21 more. Effective Apr 29, 1985 - [AD 85-02-06](https://openairdocs.org/ad/85-02-06): AN/NAS Standard Bolts · Scotts-Bell 47 47G-2A, 47G-2A-1, 47G-3 and 12 more. Effective Feb 6, 1985 - [AD 81-17-01](https://openairdocs.org/ad/81-17-01): Starting Vibrator Assemblies · Bendix Starting Vibrator Assemblies, B-2, B-2A and 49 more. Effective Aug 13, 1981 - [AD 80-10-04 R1](https://openairdocs.org/ad/80-10-04-R1): Tail Rotor Blades · Continental Copters OH-13H, OH-13E, OH-13E and 26 more. Effective Feb 28, 1981 - [AD 81-04-03](https://openairdocs.org/ad/81-04-03): Tail Rotor Drive Assembly · Continental Copters OH-13H, OH-13E, OH-13E and 26 more. Effective Feb 2, 1981 - [AD 80-21-09 R1](https://openairdocs.org/ad/80-21-09-R1): Tail Rotor Pitch Link · Continental Copters OH-13H, OH-13E, OH-13E and 26 more. Effective Nov 24, 1980 - [AD 80-23-02](https://openairdocs.org/ad/80-23-02): Turbine Power Conversions · Allison 250-C20/250-C20B engine (Siam Hiller Holdings STC SH177WE or 2 others). Effective Nov 20, 1980 - [AD 79-23-07](https://openairdocs.org/ad/79-23-07): Soloy Conversion per STC SH657NW · Allison 250-C18A, -C18C, -C20, -C20B engine (Siam Hiller Holdings STC SH657NW). Effective Nov 26, 1979 - [AD 78-03-01](https://openairdocs.org/ad/78-03-01): Hopper Support Bracket (STC SH357SW) · Scotts-Bell 47 47, 47B, 47B3 and 21 more. Effective Mar 6, 1978 - [AD 77-21-01](https://openairdocs.org/ad/77-21-01): Tail Rotor Gear Boxes · Scotts-Bell 47 47, 47B, 47B3 and 21 more. Effective Nov 14, 1977 - [AD 70-10-08](https://openairdocs.org/ad/70-10-08): Tail Rotor Grips · Scotts-Bell 47 47, 47B, 47B3 and 21 more. Effective Jul 20, 1976 - [AD 74-08-02](https://openairdocs.org/ad/74-08-02): Mast Control Stabilizer Bar Assembly · Scotts-Bell 47 47, 47B, 47B3 and 21 more. Effective Jun 14, 1974 - [AD 74-07-01](https://openairdocs.org/ad/74-07-01): Main Rotor Control Tube Assembly · Scotts-Bell 47 47, 47B, 47B3 and 21 more. Effective May 30, 1974 - [AD 73-19-04](https://openairdocs.org/ad/73-19-04): Main Rotor Blade Grip · Scotts-Bell 47 47, 47B, 47B3 and 21 more. Effective Oct 10, 1973 - [AD 72-02-05](https://openairdocs.org/ad/72-02-05): Control Rod Assembly · Scotts-Bell 47 47G, 47G-2, 47G-2A and 11 more. Effective Feb 22, 1972 - [AD 70-08-02](https://openairdocs.org/ad/70-08-02): Tail Rotor Drive Shaft · Scotts-Bell 47 47, 47B, 47B3 and 21 more. Effective Jan 1, 1971 - [AD 67-26-04](https://openairdocs.org/ad/67-26-04): Altimeters · Bell Helicopter Textron Canada 206A, 150G, 172H (USAF T-41A) and 36 more - [AD 65-04-01](https://openairdocs.org/ad/65-04-01): Freewheeling Clutch · Scotts-Bell 47 47, 47B, 47B3 and 21 more. Effective Feb 17, 1965 - [AD 62-27-02](https://openairdocs.org/ad/62-27-02): Wood Tail Rotor Blades · Scotts-Bell 47 47, 47B, 47B3 and 21 more. Effective Jan 29, 1963 - [AD 62-23-02](https://openairdocs.org/ad/62-23-02): Main Rotor Mast Thrust Bearing · Scotts-Bell 47 47, 47B, 47B3 and 21 more. Effective Oct 29, 1962 - [AD 61-22-01](https://openairdocs.org/ad/61-22-01): Pitch Link Rod End Bearing · Scotts-Bell 47 47, 47B, 47B3 and 21 more. Effective Nov 7, 1961 - [AD 59-05-01](https://openairdocs.org/ad/59-05-01): Tail Rotor Blade Inspection · Scotts-Bell 47 47, 47B, 47B3 and 21 more - [AD 58-26-02](https://openairdocs.org/ad/58-26-02): M-S MA4-5AA Carburetor · Scotts-Bell 47 47, 47B, 47B3 and 21 more - [AD 57-08-01](https://openairdocs.org/ad/57-08-01): Tail Rotor Drive Shafts · Scotts-Bell 47 47, 47B, 47B3 and 21 more - [AD 57-07-02](https://openairdocs.org/ad/57-07-02): Rotor Hub Equalizer Link · Scotts-Bell 47 47, 47B, 47B3 and 21 more - [AD 56-25-02](https://openairdocs.org/ad/56-25-02): Tail Rotor Pitch Bearings · Scotts-Bell 47 47, 47B, 47B3 and 21 more - [AD 56-15-02](https://openairdocs.org/ad/56-15-02): Swashplate Control Ring · Scotts-Bell 47 47, 47B, 47B3 and 21 more - [AD 56-05-01](https://openairdocs.org/ad/56-05-01): Tail Rotor Drive Shafts · Scotts-Bell 47 47, 47B, 47B3 and 21 more - [AD 55-16-01](https://openairdocs.org/ad/55-16-01): Tail Rotor Hub Fillet · Scotts-Bell 47 47, 47B, 47B3 and 21 more - [AD 52-28-03](https://openairdocs.org/ad/52-28-03): Tail Rotor Gearbox Shaft · Scotts-Bell 47 47, 47B, 47B3 and 21 more - [AD 52-21-01](https://openairdocs.org/ad/52-21-01): Lord Mount Guards · Scotts-Bell 47 47, 47B, 47B3 and 21 more - [AD 52-05-03](https://openairdocs.org/ad/52-05-03): Engine Mount Safety Strap · Scotts-Bell 47 47, 47B, 47B3 and 21 more - [AD 52-01-06](https://openairdocs.org/ad/52-01-06): Tail Boom Spoiler · Scotts-Bell 47 47, 47B, 47B3 and 21 more - [AD 51-27-01](https://openairdocs.org/ad/51-27-01): Engine Mount Replacement · Scotts-Bell 47 47, 47B, 47B3 and 21 more - [AD 48-13-02](https://openairdocs.org/ad/48-13-02): Fuel Pump Rocker Pin · Scotts-Bell 47 47, 47B, 47B3 and 21 more Historical (superseded or no longer in force): - [AD 2021-23-13](https://openairdocs.org/ad/2021-23-13) (historical): Ground Proximity System · Airbus Helicopters K-225, K-190A, K-240 and 237 more. Effective Dec 9, 2021 - [AD 2000-18-51](https://openairdocs.org/ad/2000-18-51) (historical): Main Rotor Blade Grip · Bell Helicopter Textron 47B, 47B3, 47D and 19 more. Effective Nov 30, 2000 - [AD 86-06-08 R1](https://openairdocs.org/ad/86-06-08-R1) (historical): Main Rotor Blade Grips · Bell Helicopter Textron 47B, 47B3, 47D and 25 more. Effective Jul 10, 1987 ## Registered aircraft (20) - [N102SH](https://openairdocs.org/aircraft/N102SH): [Scotts Helicopter Services Inc](https://openairdocs.org/faa-owner/SCOTTS%20HELICOPTER%20SERVICES%20INC), [Le Sueur, MN](https://openairdocs.org/faa-place/MN/Le%20Sueur), built 1971, S/N 7762 - [N115SL](https://openairdocs.org/aircraft/N115SL): [Dykstra Donald J](https://openairdocs.org/faa-owner/DYKSTRA%20DONALD%20J), [Dorr, MI](https://openairdocs.org/faa-place/MI/Dorr), S/N 7694 - [N124SH](https://openairdocs.org/aircraft/N124SH): [Scott'S Helicopter Services Inc](https://openairdocs.org/faa-owner/SCOTT'S%20HELICOPTER%20SERVICES%20INC), [Le Sueur, MN](https://openairdocs.org/faa-place/MN/Le%20Sueur), built 1967, S/N 7599 - [N1342X](https://openairdocs.org/aircraft/N1342X): [Hhi Farms LLC](https://openairdocs.org/faa-owner/HHI%20FARMS%20LLC), [Hamilton, MI](https://openairdocs.org/faa-place/MI/Hamilton), built 1965, S/N 7531 - [N1396X](https://openairdocs.org/aircraft/N1396X): [Hammock Flying Service Inc](https://openairdocs.org/faa-owner/HAMMOCK%20FLYING%20SERVICE%20INC), [Smithville, AR](https://openairdocs.org/faa-place/AR/Smithville), built 1967, S/N 7570 - [N1420W](https://openairdocs.org/aircraft/N1420W): [Hammock Flying Service Inc](https://openairdocs.org/faa-owner/HAMMOCK%20FLYING%20SERVICE%20INC), [Smithville, AR](https://openairdocs.org/faa-place/AR/Smithville), built 1969, S/N 7663 - [N188SH](https://openairdocs.org/aircraft/N188SH): [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 7753 - [N21MP](https://openairdocs.org/aircraft/N21MP): [Back Jeff](https://openairdocs.org/faa-owner/BACK%20JEFF), [Oneonta, NY](https://openairdocs.org/faa-place/NY/Oneonta), built 1971, S/N 7755 - [N22353](https://openairdocs.org/aircraft/N22353): [Rye Corp LLC](https://openairdocs.org/faa-owner/RYE%20CORP%20LLC), [Lenoir City, TN](https://openairdocs.org/faa-place/TN/Lenoir%20City), built 1970, S/N 7721 - [N285TT](https://openairdocs.org/aircraft/N285TT): [Valiair Lc Trustee](https://openairdocs.org/faa-owner/VALIAIR%20LC%20TRUSTEE), [Casper, WY](https://openairdocs.org/faa-place/WY/Casper), built 1971, S/N 7746 - [N4262Y](https://openairdocs.org/aircraft/N4262Y): [Swift Horse Wj LLC](https://openairdocs.org/faa-owner/SWIFT%20HORSE%20WJ%20LLC), [Fredericksburg, TX](https://openairdocs.org/faa-place/TX/Fredericksburg), built 1965, S/N 7674 - [N470BH](https://openairdocs.org/aircraft/N470BH): [Bell Textron Inc](https://openairdocs.org/faa-owner/BELL%20TEXTRON%20INC), [Fort Worth, TX](https://openairdocs.org/faa-place/TX/Fort%20Worth), S/N 7706 - [N474JP](https://openairdocs.org/aircraft/N474JP): [Lake Norman Air Tours LLC](https://openairdocs.org/faa-owner/LAKE%20NORMAN%20AIR%20TOURS%20LLC), [Mooresville, NC](https://openairdocs.org/faa-place/NC/Mooresville), built 1970, S/N 7725 - [N514HE](https://openairdocs.org/aircraft/N514HE): [Johnson Flying Service LLC](https://openairdocs.org/faa-owner/JOHNSON%20FLYING%20SERVICE%20LLC), [Exira, IA](https://openairdocs.org/faa-place/IA/Exira), built 1968, S/N 7654 - [N55ZD](https://openairdocs.org/aircraft/N55ZD): [American Airpower Heritage Flying Museum](https://openairdocs.org/faa-owner/AMERICAN%20AIRPOWER%20HERITAGE%20FLYING%20MUSEUM), [Dallas, TX](https://openairdocs.org/faa-place/TX/Dallas), built 1969, S/N 7689 - [N7162M](https://openairdocs.org/aircraft/N7162M): [Fast Toys For Boys Inc](https://openairdocs.org/faa-owner/FAST%20TOYS%20FOR%20BOYS%20INC), [Wenatchee, WA](https://openairdocs.org/faa-place/WA/Wenatchee), built 1967, S/N 7569 - [N737MC](https://openairdocs.org/aircraft/N737MC): [Coggin Mark](https://openairdocs.org/faa-owner/COGGIN%20MARK), [Burleson, TX](https://openairdocs.org/faa-place/TX/Burleson), built 1967, S/N 7560 - [N797WS](https://openairdocs.org/aircraft/N797WS): [Wild Goose Of Plant City LLC](https://openairdocs.org/faa-owner/WILD%20GOOSE%20OF%20PLANT%20CITY%20LLC), [Thonotosassa, FL](https://openairdocs.org/faa-place/FL/Thonotosassa), S/N 7509 - [N7NB](https://openairdocs.org/aircraft/N7NB): [Magnum Aviation LLC](https://openairdocs.org/faa-owner/MAGNUM%20AVIATION%20LLC), [Goff, KS](https://openairdocs.org/faa-place/KS/Goff), built 1970, S/N 7732 - [N8478T](https://openairdocs.org/aircraft/N8478T): [Land Sea Air Leasing Corp](https://openairdocs.org/faa-owner/LAND%20SEA%20AIR%20LEASING%20CORP), [Ward Cove, AK](https://openairdocs.org/faa-place/AK/Ward%20Cove), built 1971, S/N 7754 ## NTSB investigations (122, 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 ERA26LA331](https://openairdocs.org/ntsb/ERA26LA331), Sep 6, 2026: Bell 47G-4A (N797WS), Alcoma, FL, substantial damage, investigation ongoing - [NTSB CEN25LA298](https://openairdocs.org/ntsb/CEN25LA298), Jul 31, 2025: Bell 47G (N102SH), Assumption, MN, substantial damage. Probable cause: A total loss of engine power due to fuel starvation, which resulted from attitude-inducing unporting of the fuel. - [NTSB WPR19TA245](https://openairdocs.org/ntsb/WPR19TA245), Aug 28, 2019: Bell 47G (N6064H), North Las Vegas, NV, substantial damage. Probable cause: The noncertificated passenger’s loss of control during attempted hover operations. - [NTSB GAA15CA202](https://openairdocs.org/ntsb/GAA15CA202), Jul 25, 2015: Bell 47G (N1420W), De Queen, AR, substantial damage. Probable cause: The pilot's failure to conduct helicopter performance planning, which resulted in an uncontrolled descent and impact with a truck and terrain during takeoff from an elevated platform. - [NTSB CEN15LA322](https://openairdocs.org/ntsb/CEN15LA322), Jul 24, 2015: Bell 47G 4A (N1396X), Gilbert, IA, substantial damage. Probable cause: The total loss of engine power due to fuel starvation because the available fuel shifted within the tanks due to an abrupt nose-low maneuver to avoid an obstacle, which resulted in a hard forced… - [NTSB CEN11CA403](https://openairdocs.org/ntsb/CEN11CA403), Jun 18, 2011: Bell 47G-4A (N24HM), Montgomery City, MO, substantial damage. Probable cause: A loss of control during the precautionary landing, which resulted in inadvertent contact between the main rotor and the tailboom. Contributing to the accident was the overloaded condition. - [NTSB CEN10LA431](https://openairdocs.org/ntsb/CEN10LA431), Jul 24, 2010: Bell 47G-4A (N124SH), Rochester, MN, substantial damage, 1 fatal. Probable cause: The total loss of engine power due to a high-cycle fatigue fracture of a first-stage compressor blade. The reason for the fracture could not be determined during postaccident examination. - [NTSB WPR10CA283](https://openairdocs.org/ntsb/WPR10CA283), Jun 8, 2010: Bell 47G-4A (N7069J), Shaw Island, WA, substantial damage. Probable cause: The passenger's inadvertent movement of the mixture control during climb, resulting in a loss of engine power. - [NTSB WPR10LA117](https://openairdocs.org/ntsb/WPR10LA117), Jan 22, 2010: Bell 47G-4A (N28938), Shafter, CA, substantial damage. Probable cause: The loss of a main rotor blade counterweight due to corrosion. Contributing to the accident was the failure of the operator to perform the initial and recurrent inspections required by a Service… - [NTSB CHI08LA211](https://openairdocs.org/ntsb/CHI08LA211), Jul 24, 2008: Bell 47G-4A (N24HM), Mayville, WI, minor damage, 1 fatal. Probable cause: The pilot's failure to maintain clearance with the rotating rotor blades after he exited the helicopter after landing. - [NTSB DFW06CA142](https://openairdocs.org/ntsb/DFW06CA142), May 30, 2006: Bell 47G-4A (N4086C), Sheridan, AR, substantial damage. Probable cause: The pilot's inadequate fuel management, which resulted in fuel exhaustion and a subsequent loss of engine power. A contributing factor was the lack of suitable terrain for the forced landing. - [NTSB DFW05LA190](https://openairdocs.org/ntsb/DFW05LA190), Jul 15, 2005: Bell 47G-4A (N4087L), Black Oak, AR, substantial damage. Probable cause: The loss of engine power for undetermined reasons. A contributing factor was the lack of suitable terrain for the forced landing. - [NTSB LAX05LA187](https://openairdocs.org/ntsb/LAX05LA187), May 25, 2005: Bell 47G-4A (N110DT), Bakersfield, CA, destroyed. Probable cause: the pilot's inadequate visual lookout and failure to maintain clearance from the power lines. - [NTSB LAX04LA176](https://openairdocs.org/ntsb/LAX04LA176), Apr 3, 2004: Bell 47G-4A (N7NB), Bakersfield, CA, substantial damage. Probable cause: a loss of tail rotor drive due to a disconnection of the drive shaft's splined coupling at the tail rotor gear box. The splined coupling to tail rotor gear box disconnection occurred as a result of… - [NTSB FTW02LA186](https://openairdocs.org/ntsb/FTW02LA186), Jun 23, 2002: Bell 47G4 (N62446), Grand Lake, LA, destroyed. Probable cause: the pilot's inability to control the helicopter in a hover due to the restricted movement of the cyclic for undetermined reasons. - [NTSB ATL02FA107](https://openairdocs.org/ntsb/ATL02FA107), May 25, 2002: Bell 47G-4A (N6SR), Yauco, PR, destroyed, 1 fatal. Probable cause: The pilot's failure to apply carburetor heat that resulted in a partial loss of engine power and the subsequent collision with an object during the forced landing. A factor was weather conditions… - [NTSB LAX01LA276](https://openairdocs.org/ntsb/LAX01LA276), Aug 11, 2001: Bell 47G-4A (N4262Y), Strathmore, CA, destroyed. Probable cause: The pilot's inadequate visual lookout while maneuvering during an aerial application flight. - [NTSB LAX01LA196](https://openairdocs.org/ntsb/LAX01LA196), May 31, 2001: Bell 47G-4A (N110DT), Buttonwillow, CA, substantial damage. Probable cause: The pilot's inadequate in-flight planning that resulted in settling with power during an aerial application turn-to-reverse direction and collision with the ground. Factors were high density altitude… - [NTSB LAX00LA116](https://openairdocs.org/ntsb/LAX00LA116), Mar 7, 2000: Bell 47G-4A (N1354X), Wasco, CA, substantial damage. Probable cause: The pilot's failure to use carburetor heat, which resulted in a loss of engine power. Factors included the ambient carburetor icing conditions and the lack of suitable terrain for the forced landing. - [NTSB MIA98FA229](https://openairdocs.org/ntsb/MIA98FA229), Aug 23, 1998: Bell 47G-4A (N7162M), Carrollton, AL, substantial damage. Probable cause: The pilots failure to follow written instructions in the flight manual for an engine failure, and the improper use of flight controls (cyclic/collective) during an autorotation resulting in a hard… - [NTSB LAX98LA197](https://openairdocs.org/ntsb/LAX98LA197), Jun 14, 1998: Bell 47G-4A (N110DT), Shafter, CA, substantial damage. Probable cause: The aircraft's encounter with settling with power, which resulted from the pilot's decision to perform a steep downwind approach. - [NTSB FTW98LA030](https://openairdocs.org/ntsb/FTW98LA030), Oct 16, 1997: Bell 47G-4A (N7104J), Welsh, LA, substantial damage. Probable cause: the pilot's failure to maintain control of the helicopter, while maneuvering to avoid an obstruction. The abrupt maneuver was a related factor. - [NTSB SEA97LA191](https://openairdocs.org/ntsb/SEA97LA191), Aug 17, 1997: Bell 47G (N9571), Wellpinit, WA, substantial damage. Probable cause: The pilot's selection of an unsuitable landing site, and his failure to maintain rotor blade clearance from terrain during landing. - [NTSB ATL96LA129](https://openairdocs.org/ntsb/ATL96LA129), Sep 19, 1996: Bell 47G-4A (Soloy) (N23PH), Belmont, MS, substantial damage. Probable cause: failure of the aft universal joint of the tail rotor drive shaft, due to inadequate lubrication by company maintenance personnel. A factor relating to the accident was the pilot's delay in… - [NTSB LAX96LA315](https://openairdocs.org/ntsb/LAX96LA315), Aug 26, 1996: Bell 47-G4A (N474GA), Guam, destroyed, 1 fatal. Probable cause: loss of tail rotor control due to improper maintenance. - [NTSB MIA96LA210](https://openairdocs.org/ntsb/MIA96LA210), Aug 11, 1996: Bell 47G-4A (N9472G), Adel, GA, destroyed, 1 fatal. Probable cause: the pilot's misjudgment of clearance between the helicopter and the antenna. A factor relating to the accident was the pilot's use of a drug (medication) that had sedative effects. - [NTSB LAX96LA149](https://openairdocs.org/ntsb/LAX96LA149), Nov 2, 1995: Bell 47G-4A (N99138), Pacific Ocean (Pacific Ocean), destroyed. Probable cause: failure of the pilot to maintain lateral control of the helicopter, while hovering in preparation for a precautionary landing next to a ship at sea. Factors relating to the accident were: the… - [NTSB FTW96LA005](https://openairdocs.org/ntsb/FTW96LA005), Oct 3, 1995: Bell 47G-4A (N6SR), Edinburg, TX, substantial damage. Probable cause: the pilot's improper takeoff planning which resulted in the loss of conrol. A factor was the gusty crosswind condition. - [NTSB CHI95LA270](https://openairdocs.org/ntsb/CHI95LA270), Aug 12, 1995: Bell 47 (N4032G), Arlington Hts, IL, substantial damage. Probable cause: plot misjudged the flare. The factors included the pilot getting too close to the lead helicopter, allowing his airspeed to get too slow, and encountering settling with power. - [NTSB FTW95LA105](https://openairdocs.org/ntsb/FTW95LA105), Feb 1, 1995: Bell 47G-4A (N6SR), El Indio, TX, destroyed. Probable cause: THE LOSS OF TAIL ROTOR EFFECTIVENESS. A FACTOR WAS THE GUSTY RIGHT QUARTERING TAILWIND. - [NTSB LAX93LA120](https://openairdocs.org/ntsb/LAX93LA120), Feb 13, 1993: Bell 47G (N1185W), Bakersfield, CA, substantial damage. Probable cause: THE CLUTCH SLIPPAGE AND FAILURE OF THE PILOT TO JETTISON THE LOAD. - [NTSB NYC92FA117](https://openairdocs.org/ntsb/NYC92FA117), Jun 16, 1992: Bell 47-G4A (N1041B), Shelburne Falls, MA, destroyed, 3 fatal. Probable cause: THE PILOT'S FAILURE TO MAINTAIN ADEQUATE OBSTACLE CLEARANCE. CONTRIBUTING WAS INADEQUATE ALTITUDE. - [NTSB LAX91LA363](https://openairdocs.org/ntsb/LAX91LA363), Aug 20, 1991: Bell 47G (N4062G), Kettleman City, CA, substantial damage. Probable cause: A NON-MECHANICAL LOSS OF ENGINE POWER DUE TO FUEL EXHAUSTION BY THE PILOT'S IMPROPER CALCULATION OF THE FUEL SUPPLY AND SUBSEQUENT HARD LANDING. - [NTSB FTW90DPJ05](https://openairdocs.org/ntsb/FTW90DPJ05), Apr 14, 1990: Bell 47G-4A (N2238W), Bixby, OK, destroyed. Probable cause: LOSS OF CONTROL DUE TO UNDETERMINED MECHANICAL FAILURE. - [NTSB DEN87DTG02](https://openairdocs.org/ntsb/DEN87DTG02), Sep 8, 1987: Bell 47G-4A (N2238W), Minot, ND, substantial damage - [NTSB LAX87DVD01](https://openairdocs.org/ntsb/LAX87DVD01), Feb 2, 1987: Bell 47G4A (N28938), Stockton, CA, substantial damage - [NTSB LAX86DVA13](https://openairdocs.org/ntsb/LAX86DVA13), Aug 8, 1986: Bell 47G-4A (N1185W), Shafter, CA, substantial damage - [NTSB DEN85LTG06](https://openairdocs.org/ntsb/DEN85LTG06), Jul 30, 1985: Bell 47G-4A (N1041B), Minot, ND, substantial damage - [NTSB FTW84LA144](https://openairdocs.org/ntsb/FTW84LA144), Feb 21, 1984: Bell 47G4A (N7956J), Refugio, TX, destroyed - [NTSB LAX83FA462](https://openairdocs.org/ntsb/LAX83FA462), Sep 28, 1983: Bell 47G-4G (N7956S), Lodi, CA, destroyed - [NTSB ATL83LA379](https://openairdocs.org/ntsb/ATL83LA379), Sep 25, 1983: Bell 47G-4A (N1400W), Wise, VA, substantial damage - [NTSB CHI83LA292](https://openairdocs.org/ntsb/CHI83LA292), Jul 5, 1983: Bell 47G-4A (N7069J), Wheeler, IL, substantial damage - [NTSB ATL83LA160](https://openairdocs.org/ntsb/ATL83LA160), Apr 13, 1983: Bell 47G-4A (N4749R), Charleston, WV, substantial damage - [NTSB LAX83FA087](https://openairdocs.org/ntsb/LAX83FA087), Feb 3, 1983: Bell 47G4 (N4262Y), Five Points, CA, destroyed - [NTSB CHI82DA347](https://openairdocs.org/ntsb/CHI82DA347), Aug 20, 1982: Bell 47G-4A (N4090G), Near Brooten, MN, substantial damage - [NTSB FTW82DRG16](https://openairdocs.org/ntsb/FTW82DRG16), Dec 9, 1981: Bell 47G-4A (N8573F), Encinal, TX, substantial damage - [NTSB FTW82DRG07](https://openairdocs.org/ntsb/FTW82DRG07), Nov 2, 1981: Bell 47G-4A (N62446), Telegraph, TX, substantial damage - [NTSB LAX82DVA05](https://openairdocs.org/ntsb/LAX82DVA05), Oct 16, 1981: Bell 47G-4A (N7NB), Wasco, CA, substantial damage - [NTSB FTW81DRG40](https://openairdocs.org/ntsb/FTW81DRG40), Jun 11, 1981: Bell 47G-4 (N7948S), Eagle Pass, TX, substantial damage - [NTSB SEA81FA035](https://openairdocs.org/ntsb/SEA81FA035), May 19, 1981: Bell 47G-4A (N9457), Aberdeen, WA, destroyed, 2 fatal All 122: https://openairdocs.org/model/bell-47g-4a/ntsb.md ## FAA accident and incident reports (103, 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 20250731018149A](https://openairdocs.org/incident/20250731018149A), Jul 31, 2025: Bell 47G-4A (N102SH), Belle Plaine, MN, Substantial damage. The aircraft was returning to base after conducting aerial application operations. Before reaching base, the aircraft experienced engine issues and crashed… - [Incident 20220219002209I](https://openairdocs.org/incident/20220219002209I), Feb 19, 2022: Bell 47G-4A (N1342X), Titusville, FL, Minor damage. Pilot was with a student who had about 100 hours in helicopters. They were practicing a circling approach and student was directed to hover over the landing… - [Accident 20190827011669A](https://openairdocs.org/incident/20190827011669A), Aug 27, 2019: Bell 47G-4A (N6064H), North Las Vegas, NV, Substantial damage. On August 27, 2019, at approximately 1500 PST, N6064H, a Bell 47G-4A helicopter, impacted terrain shortly after coming to a hover at the North Las Vegas… - [Accident 20150725014259A](https://openairdocs.org/incident/20150725014259A), Jul 25, 2015: Bell 47G-4A (N1420W), De Queen, AR, Substantial damage. On July 25, 2015, at approximately 0730 CDT, a Bell 47G-4A, N1420W, registered to hammock flying service, inc., lifted to a hover from a platform atop a fuel… - [Accident 20150724011709A](https://openairdocs.org/incident/20150724011709A), Jul 24, 2015: Bell 47G-4A (N1396X), Gilbert, IA, Substantial damage. After completing aerial application, the pilot climbed up to an altitude of approximately 150 AGL over the corn field. The airman then nosed the aircraft over… - [Incident 20130729014999I](https://openairdocs.org/incident/20130729014999I), Jul 29, 2013: Bell 47G-4A (N1396X), Beaman, IA, Minor damage. The airman was conducting agricultural aerial application in a cornfield. He had conducted multiple passes in this field. The field had electrical transmission… - [Accident 20110618012569A](https://openairdocs.org/incident/20110618012569A), Jun 18, 2011: Bell 47G-4A (N24HM), Five Miles West, MO, Substantial damage. Agricultural helicopter N24HM landed on top of the service vehicle to be serviced with fuel and product by the vehicle driver. Fuel was reportedly added to 25… - [Accident 20100724042799A](https://openairdocs.org/incident/20100724042799A), Jul 24, 2010: Bell 47G-4A (N124SH), Eyota, MN, Destroyed, 1 fatal. Helicopter departed truck and was enroute to spray a field when it struck a small hill. This caused substantial damage and fatal injuries to the pilot in… - [Accident 20100608034879A](https://openairdocs.org/incident/20100608034879A), Jun 8, 2010: Bell 47G-4A (N7069J), Shaw Island, WA, Substantial damage. On June 9, 2010, during a telephone interview with the PIC, [privacy data omitted], he stated that the helicopter, Bell 47G (N7069J) which was equipped with… - [Accident 20100122026059A](https://openairdocs.org/incident/20100122026059A), Jan 22, 2010: Bell 47G-4A (N28938), Shafter, CA, Substantial damage. Pilot stated he was nearing his first aerial application pass traveling in a northwest direction, turning and decending. Approximate altitude of 80 feet and… - [Accident 20080724850309A](https://openairdocs.org/incident/20080724850309A), Jul 24, 2008: Bell 47G4A (N24HM), Mayville, WI, Minor damage, 1 fatal. (-23) After lifting off from the chemical truck to begin spraying application, the witness on the truck stated that the aircraft was able to move forward but… - [Accident 20060530009509A](https://openairdocs.org/incident/20060530009509A), May 30, 2006: Bell 47G4A (N4086C), Sheridan, AR, Substantial damage. (-23) On may 30, 2006, about 1737 central daylight time, a Bell helicopter BHT-47-G4A, operated as a commercial agricultural aircraft, zmug, by the commercial… - [Accident 20050715016059A](https://openairdocs.org/incident/20050715016059A), Jul 15, 2005: Bell 47G4A (N4087L), Black Oak, AR, Substantial damage. (-23) On July 15, 2005 at 1345 local time rotorcraft N4087L, a Bell BHT-47-G4A piloted by [privacy data omitted] crashed in a field near Black Oak, Arkansas.… - [Accident 20050525010219A](https://openairdocs.org/incident/20050525010219A), May 25, 2005: Bell 47G4A (N110DT), Buttonwillow, CA, Destroyed. (-23) The pilot knew that the power lines were near the edge of the field but failed to miss them as he approached the cotton field on his second pass. An… - [Accident 20040403004479A](https://openairdocs.org/incident/20040403004479A), Apr 3, 2004: Bell 47G4A (N7NB), Shafter, CA, Substantial damage. (-23) During aerial application, the rotorcraft experienced loss of tail rotor authority. Further investigation revealed that all hangar bearings,… - [Incident 20040319006589I](https://openairdocs.org/incident/20040319006589I), Mar 19, 2004: Bell 47G4A (N55ZD), Detroit, MI, Minor damage. (-23) Number 4 connecting rod failed. In level flight helicopter lost power. The pilot autorotated to a safe landing in the grass along the south side of… - [Accident 20020623015009A](https://openairdocs.org/incident/20020623015009A), Jun 23, 2002: Bell 47G4A (N62446), Grandlake, LA, No damage. (-23) During take off from an unimproved landing area a passenger blocked the cyclic control resulting in the right skid contacting the ground. The aircraft… - [Accident 20020525015489A](https://openairdocs.org/incident/20020525015489A), May 25, 2002: Bell 47G4A (N6SR), Yauco, Puerto Rico, No damage, 1 fatal. (-23) During cruise flight pilot noticed partial loss of engine power, he also noticed engine oil pressure reading low. Pilot decided to do a precautionary… - [Accident 20010811020569A](https://openairdocs.org/incident/20010811020569A), Aug 11, 2001: Bell 47G4A (N4262Y), Strathmore, CA, No damage. (-23) Approximately 06:30 the pilot arrived at the field in which he intended to do agricultural spraying. The pilot did two complete turns around this field… - [Accident 20010531009989A](https://openairdocs.org/incident/20010531009989A), May 31, 2001: Bell 47G4A (N110DT), Bakersffield, CA, Substantial damage. (.19)On may 31, 2001, at 1136 hours pacific daylight time, a Bell 47G-4A, N110DT, crashed under unknown circumstances near bakersfield, California. The… - [Accident 20000307005009A](https://openairdocs.org/incident/20000307005009A), Mar 7, 2000: Bell 47G4 (N1354X), Wasco, CA, No damage. (-23) On March 7, 2000, at approximately 1025 am PST, Bell 47G4, N1354X, piloted by a commerical helicopter pilot on a part 137 aerial application, after… - [Incident 19990817012379I](https://openairdocs.org/incident/19990817012379I), Aug 17, 1999: Bell 47G4A (N62446), Sparta, TN, Minor damage, 1 fatal. 1967 Bell 47G-4A had to make an emergency landing for unknown reasons shortly after take-off, after exiting the acft the pilot was struck and killed by the… - [Accident 19980823021849A](https://openairdocs.org/incident/19980823021849A), Aug 23, 1998: Bell 47G4A (N7162M), Carrollton, AL, Substantial damage. 1967 Bell 47G-4A helicopter experienced an interruption of engine power at a low altitude, and the acft made an emergency hard landing. (.4) history of flight… - [Accident 19980614013369A](https://openairdocs.org/incident/19980614013369A), Jun 14, 1998: Bell 47G4A (N110DT), Shafter, CA, Substantial damage. Bell 47G-4A helicopter made a hard landing and tipped over on its nose. St. petersburg, FL.(.4) on June 14, 1998, at 1530 hours pacific daylight time, a Bell… - [Accident 19971016046479A](https://openairdocs.org/incident/19971016046479A), Oct 16, 1997: Bell 47G4A (N7104J), Welch, LA, No damage. (-23) On October 16, 1997, at approximately 0955 CDT, a Bell 47G-4A helicopter, N7104J, owned and operated by industrial helicopters inc., under title 14 CFR… - [Accident 19970817025889A](https://openairdocs.org/incident/19970817025889A), Aug 17, 1997: Bell 47G4A (N9571), Wellpinit, WA, Substantial damage. (.19) On August 17, 1997, about 1420 pacific daylight time, N9571, a Bell 47G helicopter, operated by the owner/pilot, impacted terrain and was substantially… - [Accident 19960919029369A](https://openairdocs.org/incident/19960919029369A), Sep 19, 1996: Bell 47G4A (N23PH), Belmont, MS, Substantial damage. Aircraft lost control and crashed into trees. (.4)during an aerial application operation, the pilot was making east and west swath runs. He reported that he… - [Accident 19960826023799A](https://openairdocs.org/incident/19960826023799A), Aug 26, 1996: Bell 47G4A (N474GA), Tamuning, Guam, Destroyed, 1 fatal. Banner fell off helicopter at cruise. Plane spun to right into ocean. Had lost tail rotor drive pin. Lost control. - [Accident 19960811022109A](https://openairdocs.org/incident/19960811022109A), Aug 11, 1996: Bell 47G4A (N9472G), Adel, GA, Destroyed, 1 fatal. Helicopter working on tv tower, wind affected the aircraft making hard to control. Rotor blade struck tower. - [Accident 19951102046959A](https://openairdocs.org/incident/19951102046959A), Nov 2, 1995: Bell 47G4A (N99138), Pacific Ocean, Guam, Destroyed. Fish spotting. After liftoff ship pad hydraulic failure. In hover next to ship spotter jumped out. 47 rolled over. (.19) on November 2, 1995, about 1000 hours… - [Accident 19951003030889A](https://openairdocs.org/incident/19951003030889A), Oct 3, 1995: Bell 47G4A (N6SR), Edinburg, TX, Substantial damage. Liftoff flatbed encountered wind gust at transitional speed. Rolled. Pitched down. Right skid hit water in a pond. - [Accident 19950812023409A](https://openairdocs.org/incident/19950812023409A), Aug 12, 1995: Bell 47G4A (N4032G), Arlington Heigh, IL, Substantial damage. Flight 2 helicopters landing on race track. Got too close. Slowed steep descent. Get into settling with power. (-23) Mr. Meilahn was employed by and operating… - [Accident 19950207001279A](https://openairdocs.org/incident/19950207001279A), Feb 7, 1995: Bell 47G4A (N26177), China Lake, CA, Destroyed. While herding horses, hit a tree. - [Accident 19950201001019A](https://openairdocs.org/incident/19950201001019A), Feb 1, 1995: Bell 47G4A (N6SR), Eagle Pass, TX, Destroyed. Predator control flight chasing bobcat. Right quartering tailwind caused loss tail rotor effect. Spun to impact. - [Accident 19930213002339A](https://openairdocs.org/incident/19930213002339A), Feb 13, 1993: Bell 47G4A (N1185W), Bakersfield, CA, Substantial damage. Main rotor clutch slipped on vertical takeoff from loading truck. Lost rotor RPM. Made hard autorotation landing. - [Accident 19920616020669A](https://openairdocs.org/incident/19920616020669A), Jun 16, 1992: Bell 47G4A (N1041B), Shelburne Falls, MA, Destroyed, 3 fatal. Struck wires flying low over a river on a business survey flight. Dropped into river on impact. - [Accident 19910820035189A](https://openairdocs.org/incident/19910820035189A), Aug 20, 1991: Bell 47G4A (N4062G), Kettleman, CA, Substantial damage. Fuel starvation during spray run. Made hard landing damaging helicopter. - [Incident 19901012051429I](https://openairdocs.org/incident/19901012051429I), Oct 12, 1990: Bell 47G4A (N9472G), Boise, ID. Engine failure. Autorotated and landed without damage. Pilot stated compressor stall caused problem. - [Accident 19900414009099A](https://openairdocs.org/incident/19900414009099A), Apr 14, 1990: Bell 47G4A (N2238W), Bixby, OK, Destroyed. Loud bang during a final spray run. Spray boom hit the wheat and helicopter crashed ejecting pilot. Cause unknown. - [Incident 19900306034799I](https://openairdocs.org/incident/19900306034799I), Mar 6, 1990: Bell 47G4A (N4262Y), Portville, CA, Minor damage. Contacted powerline at the end of a spray run. Landed safely. - [Accident 19870908050469A](https://openairdocs.org/incident/19870908050469A), Sep 8, 1987: Bell 47G4A (N2238W), Minot, ND, Substantial damage. The helicopter lost rotor speed after encountering its own wake during spraying. Valve failure prevented load dump. - [Accident 19870202002229A](https://openairdocs.org/incident/19870202002229A), Feb 2, 1987: Bell 47G4A (N28938), Stockton, CA, Substantial damage. The engine failed from fuel starvation and the helicopter made a hard landing. Fuel disconnect fitting fatigued. - [Accident 19860808038149A](https://openairdocs.org/incident/19860808038149A), Aug 8, 1986: Bell 47G4A (N1185W), Shafter, CA, Substantial damage. The helicopter struck the ground during takeoff after loss of directional control. Tailrotor drive shaft failed. - [Accident 19850731040539A](https://openairdocs.org/incident/19850731040539A), Jul 31, 1985: Bell 47G4A (N1041B), Minot, ND, Substantial damage. Lost control during takeoff and crashed. Aircraft out of annual. Pilots medical denied and competancy a factor. - [Accident 19840221003819A](https://openairdocs.org/incident/19840221003819A), Feb 21, 1984: Bell 47G4A (N7956J), Refugio, TX, Destroyed. Report indicates pilots control inputs caused a tail boom strike by a main rotor while herding cattle. - [Accident 19830927055499A](https://openairdocs.org/incident/19830927055499A), Sep 27, 1983: Bell 47G4A (N7956S), Lodi, CA, Destroyed. Engine quit 20 feet above ground on takeoff. Helicopter slid down a bank and rolled on landing. Water found in fuel - [Accident 19830927053059A](https://openairdocs.org/incident/19830927053059A), Sep 27, 1983: Bell 47G4A (N7919S), Catarina, TX, Destroyed. Pilot allowed tail rotor to contact platform during lift off. Helicopter rolled over and caught fire. - [Accident 19830925054069A](https://openairdocs.org/incident/19830925054069A), Sep 25, 1983: Bell 47G4A (N1400W), Wise, VA, Substantial damage. Student allowed a tail rotor strike while transitioning to a hover from a power approach lost control. Rolled over. - [Accident 19830704031229A](https://openairdocs.org/incident/19830704031229A), Jul 4, 1983: Bell 47G4A (N7069J), Wheeler, IL, Substantial damage. Crash occurred during hard emergency landing. Water found in tank sumps and rust in fuel valve. - [Accident 19830413014049A](https://openairdocs.org/incident/19830413014049A), Apr 13, 1983: Bell 47G4A (N4749R), Charleston, WV, Substantial damage. Engine quit approaching airport. Crash landed on a railroad track. Crankshaft timing gear had fatigue broken. All 103: https://openairdocs.org/model/bell-47g-4a/incidents.md ## Service difficulty reports (7) As reported by operators and repair stations, by the model named in the report. - [SDR 2008FA0000776](https://openairdocs.org/sdr/2008FA0000776), Oct 24, 2008: GUIDE. WORN. DURING INVESTIGATION OF AN ACCIDENT IN WHICH ACFT LOST POWER AND WAS FORCED TO LAND THE FOLLOWING WAS DISCOVERED: COMPRESSION CHECK REVEALED THE NR 1 CYL WAS LE - [SDR 2006FA0000759](https://openairdocs.org/sdr/2006FA0000759), Aug 2, 2006: CAPACITOR. FAILED. LOADED HELICOPTER SAFELY LANDED AFTER MAGNETO FAILURE. WIRE FROM CAPACITOR TO POINTS OPEN WITHIN INSULATION. NO VISIBLE DAMAGE, HOWEVER, MOVEMENT OF WIRE AGAINS - [SDR CA050303014](https://openairdocs.org/sdr/CA050303014), Mar 3, 2005: GRIP. CRACKED. (CAN) ROTOR GRIP WAS SUBMITTED FOR NDT TESTING IAW AD 2001-17-17 AND WAS REJECTED DUE TO CRACKING IN THE ADAPTER NUT THREAD AREA. GRIP WAS NEW AND HAD ONLY ACCU - [SDR CA050303015](https://openairdocs.org/sdr/CA050303015), Mar 3, 2005: GRIP. CRACKED. (CAN) MAIN ROTOR GRIP WAS REMOVED TO COMPLY WITH AD 2001-17-17 AND WAS REJECTED DUE TO CRACKING INDICATIONS IN THE THREADS OF THE ADAPTER NUT AREA. - [SDR CA010511027](https://openairdocs.org/sdr/CA010511027), Jan 15, 2001: HUB. CRACKED. (CAN) FOUND CRACKED IN THREADED AREA AFTER EDDY CURRENT INSPECTION WHILE CARRYING OUT AD, CF-1988-08R1. - [SDR CA001107014](https://openairdocs.org/sdr/CA001107014), Apr 30, 1999: CYLINDER. FAILED. (CAN) CYLINDER HAD LOW COMPRESSION. (X) - [SDR CA001107013](https://openairdocs.org/sdr/CA001107013), Apr 30, 1998: MAGNETO. FAILED. (CAN) MAGNETO HAS EXCESSIVE MAG DROP. ## STCs that may be installed (OpenAirDocs) (132, first 50) Approved for this 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 SA800EA](https://openairdocs.org/stc/SA800EA): Installation of Whelen Anti-Collision, Position, or Anti-Collision/Position Light System, and applicable associated power supplies. Whelen Aerospace Technologies - [STC SH100WE](https://openairdocs.org/stc/SH100WE): Installation of fiberglass baggage carriers. Texas Transland LLC - [STC SH3319NM](https://openairdocs.org/stc/SH3319NM): Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,. Precise Flight Inc - [STC SH1152NW](https://openairdocs.org/stc/SH1152NW): Installation of the Automatic Flagman Model 135 Control Stick Grip. Air Products & Parts LLC - [STC SR09066RC](https://openairdocs.org/stc/SR09066RC): Fabricate the HAC-47-3 Tail Rotor Blade. Scott's-Bell 47 Inc - [STC SR02704SE](https://openairdocs.org/stc/SR02704SE): Installation and maintenance of the Sunspot 36 and 46 series lights. AeroLED's Holdings LLC - [STC SA02268CH](https://openairdocs.org/stc/SA02268CH): Installation of Airwolf Filter Corp. Air Oil Separator. Airwolf Filter Corporation - [STC SH2772SW](https://openairdocs.org/stc/SH2772SW): Revise mast controls and remove stabilizer bar and install control system. Scott's-Bell 47 Inc - [STC SA615EA](https://openairdocs.org/stc/SA615EA): Installation of a Whelen Anti-Collision Strobe Light System as replacement for originally installed anti-collision lights. Whelen Aerospace Technologies - [STC SR00359BO](https://openairdocs.org/stc/SR00359BO): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. Whelen Aerospace Technologies - [STC SR01845SE](https://openairdocs.org/stc/SR01845SE): Installation of a barrier air filtration system. Cascade Flying Service LLC - [STC SR00408NY](https://openairdocs.org/stc/SR00408NY): Installation of Airwolf remote mounted engine oil filter model AFC-600. Airwolf Filter Corporation - [STC SR02487AK](https://openairdocs.org/stc/SR02487AK): Installation of L-3 Communications Avionics Systems ESI-500 Standby Instrument System. ADS-B Technologies, LLC - [STC SR02470AK](https://openairdocs.org/stc/SR02470AK): Installation of the L-3 Communications NGT -1000/2000/2500 ADS-B System. ADS-B Technologies, LLC - [STC SR02471AK](https://openairdocs.org/stc/SR02471AK): Installation of the L-3 Communications NGT -9000/9000R ADS-B System. ADS-B Technologies, LLC - [STC SH2348SW](https://openairdocs.org/stc/SH2348SW): Installation of Sprag System Kit P/N 74-612-153-1M Revision D, dated 9/17/14. Scott's Bell 47 Inc - [STC SR02394AK](https://openairdocs.org/stc/SR02394AK): Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system. Seaplanes North LLC - [STC SH162WE](https://openairdocs.org/stc/SH162WE): Installation of exhaust muffler assembly. Scott's Bell 47 Inc - [STC SH166GL](https://openairdocs.org/stc/SH166GL): Installation of Low Fuel Warning System. Scott's Bell 47 Inc - [STC SH1710GL](https://openairdocs.org/stc/SH1710GL): Install fixed elevator in lieu of synchronized elevator. Scott's Bell 47 Inc - [STC SH2397SW](https://openairdocs.org/stc/SH2397SW): Installation of Ag-King 500B Spray System with 2 tanks (800 pounds total allowable), 32 foot boom on end of skid tubes and engine driven pump. Scott's Bell 47 Inc - [STC SH382SW](https://openairdocs.org/stc/SH382SW): Eligible only on Bell 47 series with open tail booms. Installation of sign per Kitz Kopter's Drawing KK-101 dated 10/14/64. Scott's Bell 47 Inc - [STC SH972SW](https://openairdocs.org/stc/SH972SW): Installation of copilot's rudder pedals. Scott's Bell 47 Inc - [STC SR09321RC](https://openairdocs.org/stc/SR09321RC): Installation of Improved Main Rotor Grips and Matching Adapter Nut. Scott's Bell 47 Inc - [STC SR09346RC](https://openairdocs.org/stc/SR09346RC): Installation of main rotor blade grip with modified root radius and matching adapter in accordance with Helicopter Tech, Inc., Drawing List R47-120-252-1000, Revision IR, dated May 15, 2002, or later Federal Aviation Administration (FAA) approved revision. Helicopter Tech Inc - [STC SA00068SE](https://openairdocs.org/stc/SA00068SE): Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1). Electronics International Inc - [STC SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories. Electronics International Inc - [STC SA4172NM](https://openairdocs.org/stc/SA4172NM): Installation of Aviation Development oil filter. Aviation Development Corporation - [STC SH657NW](https://openairdocs.org/stc/SH657NW): Installation of Allison 250-C18A, -C18C, -C20, -C20B engine and related changes. Siam Hiller Holdings Inc - [STC SA02033AT](https://openairdocs.org/stc/SA02033AT): Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line. M-20 Oil Separators LLC - [STC SA00680SE](https://openairdocs.org/stc/SA00680SE): Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer. Electronics International - [STC SR01430LA](https://openairdocs.org/stc/SR01430LA): Installation of Stainless Steel Skid shoes. Papas Gary Los Angeles Laboratories Inc - [STC SA489EA](https://openairdocs.org/stc/SA489EA): Installation of ARP Inc. carburetor ice detection system. Aircraft & Rotorcraft Products (ARP) Inc - [STC SH1343SO](https://openairdocs.org/stc/SH1343SO): Installation of Utah Research& Development's Model 124BC101 airborne battery charger. Aviall Services, Inc. Lists 47 Series - [STC SA02520AT](https://openairdocs.org/stc/SA02520AT): Installation of M-20 Oil Separator, model 600-WP. M-20 Oil Separators LLC - [STC SH102WE](https://openairdocs.org/stc/SH102WE): Installation of automatic flagman model 5. R-S Sales Inc - [STC SA2687NM](https://openairdocs.org/stc/SA2687NM): Installation of Truboplus/ Electronics Int'l gauges and switches. Aero Manufacturing Inc - [STC SR00641SE](https://openairdocs.org/stc/SR00641SE): Installation of aerial mapping camera. Davis Richard B - [STC SA00238SE](https://openairdocs.org/stc/SA00238SE): Installation of Aviation Development Corporation's sump mounted chip detector. Aviation Development Corporation - [STC SA1626NM PAGE 1](https://openairdocs.org/stc/SA1626NM%20PAGE%201): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series). Electronics International - [STC SH8441SW](https://openairdocs.org/stc/SH8441SW): Installation of a float assembly. Aero Products, Inc - [STC SA2844CE](https://openairdocs.org/stc/SA2844CE): Installation of a plastic cap enclosure over the anti-collision strobe light system. Air Transport Inc - [STC SH5142NM](https://openairdocs.org/stc/SH5142NM): Install rotary atomizers, Simplex model 10060, on Simplex spray booms approved under on the the STC's SH787NW, SH856NW, SH889NW, or SH891NW. Simplex Manufacturing Company - [STC SA2350NM PAGE 1](https://openairdocs.org/stc/SA2350NM%20PAGE%201): Installation of Electronics International Inc digital carburetor/outside air temperature gauges. Electronics International - [STC SH370GL](https://openairdocs.org/stc/SH370GL): Installation of Facet Enterprises, Inc. engine lubrication system scavenge filter. Facet Filter Products - [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International - [STC SA3862NM PAGE 1](https://openairdocs.org/stc/SA3862NM%20PAGE%201): Installation of Electronics International Primary TIT/EGT/CHT instruments, remote switches and associated accessories. Electronics International - [STC SA4173NM](https://openairdocs.org/stc/SA4173NM): Installation of Simplex Model 7600 modular electrical system. (47G-5 WITH 12 VOLT SYSTEM). Simplex Manufacturing Company. Lists 47 Series - [STC SH4173NM](https://openairdocs.org/stc/SH4173NM): Installation of Simplex Model 7600 modular electrical system. (US ARMY OH-13E M74A). Simplex Manufacturing Company - [STC SH2945NM](https://openairdocs.org/stc/SH2945NM): Addition of a twist grip on the cyclic pitch stick to provide hand operated yaw control. Narad James L All 132: https://openairdocs.org/model/bell-47g-4a/stcs.md --- 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.