# N184B: 1959 Bell 47D1

- Status: Valid registration
- Airframe: [Bell 47D1](https://openairdocs.org/model/bell-47d1) (registry code 1180802, 3 seats)
- Engine: [Franklin 6V4 series](https://openairdocs.org/engine/franklin-6v4-series) (registry code 27033)
- Data sheets: [TCDS H-1](https://openairdocs.org/tcds/H-1) (Scott's-Bell 47 Inc), [TCDS E-244](https://openairdocs.org/tcds/E-244) (Franklin Sp. z.o.o.) (OpenAirDocs)
- Serial number: 45
- Year built: 1959
- Type: Rotorcraft
- Engine type: Reciprocating
- Airworthiness: Multiple
- Airworthiness date: June 6, 1961
- Certificate issued: May 15, 2006
- Expires: August 31, 2027
- Mode S code: A14FA1
- Registered owner: [Taz Air Service Inc](https://openairdocs.org/faa-owner/TAZ%20AIR%20SERVICE%20INC)
- Location: [Middletown, DE](https://openairdocs.org/faa-place/DE/Middletown)
- Owner type: Corporation
- Owner's area on the map: 39.4944° N, 75.6775° W: Placed by OpenAirDocs at the center of ZIP code 19709, within about 5 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=184B
- Page: https://openairdocs.org/aircraft/N184B

From the FAA registry file of October 22, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every Franklin 6V4 model are included.

## ADs that may apply (OpenAirDocs): 65 in force

### Matched by airframe (Bell 47D1)

- [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 85-15-04](https://openairdocs.org/ad/85-15-04): Tail Rotor Blade Yolk P/N 74-641-057-9 · Scotts-Bell 47 47B, 47B3, 47D and 7 more. Effective Jan 8, 1986
- [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 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 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 76-12-02](https://openairdocs.org/ad/76-12-02): Tail Rotor Yoke · Scotts-Bell 47 47B, 47B3, 47D and 5 more. Effective Jul 14, 1976
- [AD 76-12-01](https://openairdocs.org/ad/76-12-01): Tail Rotor Hub Bolt · Scotts-Bell 47 47B, 47B3, 47D and 4 more. Effective Jul 14, 1976
- [AD 75-18-06](https://openairdocs.org/ad/75-18-06): Tail Rotor Pitch Control · Scotts-Bell 47 47B, 47B3, 47D and 5 more. Effective Sep 19, 1975
- [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 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 70-14-01](https://openairdocs.org/ad/70-14-01): Tail Rotor Pitch · Scotts-Bell 47 47D1, 47G, 47G-2 and 1 more. Effective Aug 17, 1970
- [AD 70-14-02](https://openairdocs.org/ad/70-14-02): Tail Rotor Hub Assembly Bolt · Scotts-Bell 47 47D, 47D1, 47G and 2 more. Effective Aug 10, 1970
- [AD 70-11-04](https://openairdocs.org/ad/70-11-04): Wood Main Rotor Blades · Scotts-Bell 47 47B, 47B3, 47D and 4 more. Effective Jun 26, 1970
- [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 60-10-01](https://openairdocs.org/ad/60-10-01): Scissor Lever Bolts · Scotts-Bell 47 47B, 47B3, 47D and 7 more
- [AD 73-19-02](https://openairdocs.org/ad/73-19-02): Tail Rotor Yoke · Scotts-Bell 47 47B, 47B3, 47D and 5 more
- [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 58-23-01](https://openairdocs.org/ad/58-23-01): Tail Rotor Pitch Change Bearings · Scotts-Bell 47 47B, 47B3, 47D and 4 more
- [AD 57-12-04](https://openairdocs.org/ad/57-12-04): Tail Rotor Blade Inspection · Scotts-Bell 47 47B, 47B3, 47D and 5 more
- [AD 57-08-02](https://openairdocs.org/ad/57-08-02): Parker Check Valve · Scotts-Bell 47 47B3, 47D, 47D1 and 2 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 56-20-03](https://openairdocs.org/ad/56-20-03): Tail Rotor Hub Bolts · Scotts-Bell 47 47B, 47B3, 47D and 4 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 55-05-01](https://openairdocs.org/ad/55-05-01): Pitch Control Link · Scotts-Bell 47 47B, 47B3, 47D and 2 more
- [AD 54-24-01](https://openairdocs.org/ad/54-24-01): Antitorque Pedal Stops · Scotts-Bell 47 47B, 47B3, 47D and 3 more
- [AD 53-01-01](https://openairdocs.org/ad/53-01-01): Gearbox Mounting Sleeve · Scotts-Bell 47 47D1
- [AD 52-28-04](https://openairdocs.org/ad/52-28-04): Tail Rotor Pinion Shaft · Scotts-Bell 47 47B, 47B3, 47D and 1 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 52-07-01](https://openairdocs.org/ad/52-07-01): Loading Chart Decal · Scotts-Bell 47 47D1

### Matched by engine (Franklin 6V4 series)

- [AD 69-09-01](https://openairdocs.org/ad/69-09-01): Eisemann Magnetos · Eisemann Magnetos, 2A4-45-B2, 2A4-49-B2 and 158 more
- [AD 51-28-02](https://openairdocs.org/ad/51-28-02): Oil Pump Gears · Wytwornia Sprzetu Komunikacyjnego 6V4-178-B3, 6V4-178-B31, 6V4-178-B32 and 3 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

All 68: https://openairdocs.org/aircraft/N184B/ads.md

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N184B.

## FAA accident and incident reports

None matched to N184B.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs) (126, first 50)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Bell 47D1)

- [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 SA5581SW](https://openairdocs.org/stc/SA5581SW): Installation of ALCOR true-flow/ totalizer system. Alcor 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 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 SR02471AK](https://openairdocs.org/stc/SR02471AK): Installation of the L-3 Communications NGT -9000/9000R ADS-B System. ADS-B Technologies, LLC
- [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 SH13WE](https://openairdocs.org/stc/SH13WE): Conversion of Bell Model 47D1 to(1) Model 47G-2 (2) Model 47G. Scott's Bell 47 Inc
- [STC SH213WE](https://openairdocs.org/stc/SH213WE): Installation of exhaust muffler assembly. Scott's Bell 47 Inc
- [STC SH279SW](https://openairdocs.org/stc/SH279SW): Modification of dual control cyclic stick into quick removable stick similar to Bell 47A stick by cutting off the stick and making an insert of 4130 steel tube to fit inside. Scott's Bell 47 Inc
- [STC SH283SW](https://openairdocs.org/stc/SH283SW): Change battery location from dual positions in aft and forward locations to one fixed position under the oil cooler on center frame bottom tubes and installation of ballast. 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 SH397SW](https://openairdocs.org/stc/SH397SW): Installation of hydraulic boost kit. Scott's Bell 47 Inc
- [STC SH529SW](https://openairdocs.org/stc/SH529SW): Installation of Franklin 6V-350-A engine. Scott's Bell 47 Inc
- [STC SH588SW](https://openairdocs.org/stc/SH588SW): Conversion to single-place cabin, without doors, revised cyclic and collective and throttle controls, rerouted electrical wiring. Scott's Bell 47 Inc
- [STC SH611SW](https://openairdocs.org/stc/SH611SW): Left and right door with tinted glass and sliding window. Scott's Bell 47 Inc
- [STC SH752SW](https://openairdocs.org/stc/SH752SW): Centerframe modification or replacement and installation of Lycoming VO-435 engine in lieu of Franklin installation and optional lateral control system. Scott's Bell 47 Inc
- [STC SH888SW](https://openairdocs.org/stc/SH888SW): Use of spacer in lieu of snap ring on tail rotor drive quill. 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 SR09341RC](https://openairdocs.org/stc/SR09341RC): Installation of the main rotor grips with integral drag brace clevis, new drag brace, and matching adapter nut for wood blade configurations. Scott's Bell 47 Inc
- [STC SR09454RC](https://openairdocs.org/stc/SR09454RC): Installation approval of a new engine mount assembly and lateral cyclic control support assembly. Scott's Bell 47 Inc
- [STC SH1007SW](https://openairdocs.org/stc/SH1007SW): Modify tail rotor pitch change mechanism to add duplex bearing, (P/N 47-641-131-1) in place of single row bearing. Approved for Bell models 47D1, 47G, and 47G-2 with 47-640-044 tail rotor gear box assembly. Texas Helicopter Co. 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 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 SA01258SE](https://openairdocs.org/stc/SA01258SE): Installation of the Automatic Flagman Dispenser Models in accordance with Automatic Flagman Master Drawing Lists specified in attached AML, or later FAA approved revision.This STC supercedes several existing STC s as listed in the notes on the attached AML. R-S Sales Inc
- [STC SA489EA](https://openairdocs.org/stc/SA489EA): Installation of ARP Inc. carburetor ice detection system. Aircraft & Rotorcraft Products (ARP) Inc
- [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 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 SA2844CE](https://openairdocs.org/stc/SA2844CE): Installation of a plastic cap enclosure over the anti-collision strobe light system. Air Transport Inc
- [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 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
- [STC SH3351NM](https://openairdocs.org/stc/SH3351NM): Addition of a twist grip on the cyclic pitch stick to provide a hand operated yaw control. Narad James L. Lists 47 Series

All 126: https://openairdocs.org/aircraft/N184B/stcs.md

## Earlier aircraft with N184B

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N184B before.

- [Cancelled 1976-09-15](https://openairdocs.org/deregistered/N184B-1976-09-15): Bell 47G, S/N 1091, built 1959. Exported to Nicaragua. Owner: [Orlando Helicopters Airways Inc](https://openairdocs.org/faa-owner/ORLANDO%20HELICOPTERS%20AIRWAYS%20INC), [Orlando, FL](https://openairdocs.org/faa-place/FL/Orlando)
- [Cancelled 1952-06-16](https://openairdocs.org/deregistered/N184B-1952-06-16): Bell 47D, S/N 38, built 1948. Exported to Canada. Owner: [Lee Plympton Enterprises Inc](https://openairdocs.org/faa-owner/LEE%20PLYMPTON%20ENTERPRISES%20INC), [Providence, RI](https://openairdocs.org/faa-place/RI/Providence)

## Related

- Other Bell 47D1 aircraft: https://openairdocs.org/model/bell-47d1/aircraft.md
- The Franklin 6V4 series engine: https://openairdocs.org/engine/franklin-6v4-series.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.