Type Record · As of May 3, 2026
ENSTROM HELICOPTER CORP TH-28
Rotorcraft · ROLLS-ROYC 250-C20S
Registered
1
Year Range
1991–1991
NTSB Events
0
Airworthiness Directives
14
01 / Distribution
Where the fleet lives and was built
Counts of currently-registered ENSTROM HELICOPTER CORP TH-28 aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.
By State (top 10)
- MI 100.0% 1
By Decade of Manufacture
- 1990s 100.0% 1
02 / NTSB Records
Events involving ENSTROM HELICOPTER CORP TH-28 aircraft
No NTSB-recorded events match ENSTROM HELICOPTER CORP TH-28 in the indexed corpus.
02b / NASA ASRS Reports
Near-miss reports involving ENSTROM HELICOPTER CORP TH-28
NASA's voluntary, confidential reporting system surfaces what almost went wrong. 1 de-identified ASRS report references this airframe. Pilot-written narrative. ASRS reports are voluntary and not investigated — they represent the reporter's perspective and cannot infer prevalence.
03 / Airworthiness Directives
FAA directives applicable to ENSTROM HELICOPTER CORP TH-28
14 directive(s) on file. Showing the most recent 14.
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Dec 20, 2017
Airworthiness Directives; The Enstrom Helicopter Corporation Helicopters
We are adopting a new airworthiness directive (AD) for the Enstrom Helicopter Corporation (Enstrom) Model F-28, F-28A, F-28C, F- 28C-2, F-28C-2R, F-28F, F-28F-R, TH-28, 280, 280C, 280F, 280FX, 480, and 480B helicopters. This AD requires inspecting certain rod end bearing assemblies. This AD is prompted by an accident.…
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Jun 18, 2012
Airworthiness Directives; Enstrom Helicopter Corporation Helicopters
We are superseding an existing airworthiness directive (AD) for Enstrom Helicopter Corporation (Enstrom) Model F-28C, F-28C-2, F- 28F, 280C, 280F, 280FX, TH-28, 480, and 480B helicopters to add another trim relay to the applicability and to revise the modification instructions. This AD is prompted by the discovery tha…
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Jan 6, 2012
Airworthiness Directives; Enstrom Helicopter Corporation Helicopters
We are adopting a new airworthiness directive (AD) for Enstrom Helicopter Corporation (Enstrom) Model F-28C, F-28C-2, F-28F, 280C, 280F, 280FX TH-28, 480, and 480B helicopters with certain trim relays to require modifying and testing the lateral and longitudinal cyclic trim actuator assemblies. This AD was prompted by…
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Aug 28, 2007
Airworthiness Directives; Enstrom Helicopter Corporation Model F-28A, F-28C, F-28F, TH-28, 280, 280C, 280F, 280FX, 480, and 480B Helicopters
This amendment adopts a new airworthiness directive (AD) for Enstrom Helicopter Corporation (Enstrom) Model F-28A, F-28C, F-28F, TH- 28, 280, 280C, 280F, 280FX, 480, and 480B helicopters that requires determining the installation dates for each main rotor push-pull control rod (push-pull rod), inspecting the push-pull…
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Jul 31, 2007
Airworthiness Directives; Enstrom Helicopter Corporation Model F-28, F-28A, F-28C, F-28C-2, F-28C-2R, F-28F, F-28F-R, 280, 280C, 280F, 280FX, TH-28, 480, and 480B Helicopters
This amendment adopts a new airworthiness directive (AD) for Enstrom Helicopter Corporation (Enstrom) Model F-28, F-28A, F-28C, F- 28C-2, F-28C-2R, F-28F, F-28F-R, 280, 280C, 280F, 280FX, TH-28, 480, and 480B helicopters. This action requires a visual check to determine if a certain serial-numbered main rotor blade re…
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Jan 8, 2007
Airworthiness Directives; Enstrom Helicopter Corporation Model F-28A, F-28C, F-28F, TH-28, 280, 280C, 280F, 280FX, 480, and 480B Helicopters
This document proposes adopting a new airworthiness directive (AD) for Enstrom Helicopter Corporation (Enstrom) Model F-28A, F-28C, F-28F, TH-28, 280, 280C, 280F, 280FX, 480, and 480B helicopters. The AD would require determining the installation dates for each main rotor push-pull control rod (push-pull rod), inspect…
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Jun 21, 2006
Airworthiness Directives; Rolls-Royce Corporation (Formerly Allison Engine Company, Allison Gas Turbine Division, and Detroit Diesel Allison) 250-B and 250-C Series Turboprop and Turboshaft Engines
The FAA is adopting a new airworthiness directive (AD) for Rolls-Royce Corporation 250-B and 250-C series turboprop and turboshaft engines with certain part numbers (P/Ns) of gas producer rotor assembly tie bolts manufactured by EXTEX Ltd., Pacific Sky Supply Inc., Rolls- Royce Corporation (RRC), and Superior Air Part…
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Nov 10, 2005
Airworthiness Directives; Rolls-Royce Corporation (formerly Allison Engine Company, Allison Gas Turbine Division, and Detroit Diesel Allison) 250-B and 250-C Series Turboprop and Turboshaft Engines
The FAA proposes to adopt a new airworthiness directive (AD) for Rolls-Royce Corporation 250-B and 250-C series turboprop and turboshaft engines with certain part numbers (P/Ns) of gas producer rotor assembly tie bolts manufactured by EXTEX Ltd., Pacific Sky Supply Inc., Rolls-Royce Corporation (RRC), and Superior Air…
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Jan 4, 2005
Airworthiness Directives; Rolls-Royce Corporation (formerly Allison Engine Company, Allison Gas Turbine Division, and Detroit Diesel Allison) 250-B and 250-C Series Turboprop and Turboshaft Engines
The FAA is adopting a new airworthiness directive (AD) for Rolls-Royce Corporation (RRC) 250-B and 250-C series turboprop and turboshaft engines with certain part numbers (P/Ns) of compressor adaptor couplings manufactured by Alcor Engine Company (Alcor), EXTEX Ltd. (EXTEX), RRC, and Superior Air Parts (SAP) installed…
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Jul 1, 2004
Airworthiness Directives; Rolls-Royce Corporation (Formerly Allison Engine Company, Allison Gas Turbine Division, and Detroit Diesel Allison) 250-B and 250-C Series Turbofan and Turboshaft Engines
The FAA proposes to adopt a new airworthiness directive (AD) for Rolls-Royce Corporation (RRC) 250-B and 250-C series turbofan and turboshaft engines with certain part numbers (PNs) of compressor adaptor couplings manufactured by Alcor Engine Company (Alcor), EXTEX Ltd. (EXTEX), RRC, and Superior Air Parts (SAP) insta…
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Dec 11, 2001
Airworthiness Directives; Enstrom Helicopter Corporation Model TH-28 and 480 Helicopters
This amendment adopts a new airworthiness directive (AD) for Enstrom Helicopter Corporation (EHC) Model TH-28 and 480 helicopters. This AD requires establishing a life limit for certain upper and lower main rotor hub plates of 5000 hours time-in-service (TIS), creating a component history card or equivalent record, an…
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Sep 18, 2001
Airworthiness Directives; Enstrom Helicopter Corporation Model TH-28 and 480 Helicopters
This document proposes the adoption of a new airworthiness directive (AD) for Enstrom Helicopter Corporation (EHC) Model TH-28 and 480 helicopters. The AD would require establishing a life limit for certain upper and lower main rotor hub plates of 5000 hours time-in- service (TIS), creating a component history card or…
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Apr 25, 2000
Airworthiness Directives; Allison Engine Company 250-C18 and -C20 Series Turboshaft Engines
This document proposes to adopt a new airworthiness directive (AD), applicable to Allison Engine Company 250-C18 and -C20 series turboshaft engines. This proposal would require a one-time visual inspection of the fuel nozzle screen for contamination. If contamination is found, this proposal would require, prior to fur…
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Dec 3, 1998
Airworthiness Directives; Allison Engine Company 250-B and 250-C Series Turboshaft and Turboprop Engines
This amendment adopts a new airworthiness directive (AD), applicable to certain Allison Engine Company 250-B and 250-C series turboshaft and turboprop engines, that requires replacing existing beryllium copper main fuel control (MFC) bellows assemblies with Inconel 718 stainless steel welded MFC bellows assemblies. Th…
04 / Type Certificate Data Sheets
FAA TCDS for ENSTROM HELICOPTER CORP TH-28
The TCDS is the legal certification document — weight limits, performance, equipment, AD compliance times, operating limitations. 1 match in the FAA catalog.
- H1CE Historical Rev 35 · 12/15/2015
The Enstrom Helicopter Corporation
Models: F-28C, F-28F, TH-28, F-28A + 10 more
06 / Supplemental Type Certificates
Modifications approved for ENSTROM HELICOPTER CORP TH-28
29 STCs on file — every FAA-approved modification, alteration, or installation for this aircraft. STOL kits, avionics, fuel systems, floats, engine swaps, you name it.
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01/11/2024
STC SR04637CH
Replacement of existing main ship battery with Lithium Ion Battery and installation of Annunciator Control Panel
Airwolf Aerospace LLC
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04/14/2023
STC SH3319NM
Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,
Precise Flight Inc
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12/17/2020
STC SR02704SE
Installation and maintenance of the Sunspot 36 and 46 series lights
AeroLED's Holdings LLC
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12/17/2020
STC SR02704SE
Installation and maintenance of the Sunspot 36 and 46 series lights
AeroLEDS LLC
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05/19/2020
STC SH3319NM (1 OF 2)
Installation of Precise Flight Pulselite Control Unit in the\nLanding /Taxi Recognition Visual Control Light system,
Precise Flight Inc
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05/29/2019
STC SR00359BO
Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights.
Whelen Aerospace Technologies
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05/23/2017
STC SR02487AK
Installation of L-3 Communications Avionics Systems ESI-500 Standby Instrument System
ADS-B Technologies, LLC
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12/29/2016
STC SH3319NM
Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,
Precise Flight Inc
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11/28/2016
STC SR00359BO
Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights.
Whelen Engineering Co Inc
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03/04/2016
STC SR02470AK
Installation of the L-3 Communications NGT -1000/2000/2500 ADS-B System
ADS-B Technologies, LLC
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03/04/2016
STC SR02471AK
Installation of the L-3 Communications NGT -9000/9000R ADS-B System
ADS-B Technologies, LLC
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02/16/2016
STC SR02470AK
Installation of the L-3 Communications NGT -1000/2000/2500 ADS-B System
ADS-B Technologies LLC
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02/16/2016
STC SR02471AK
Installation of the L-3 Communications NGT -9000/9000R ADS-B System
ADS-B Technologies LLC
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06/08/2015
STC SR03465CH
Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-ECD-084-280, or AA-ECD-084-480
Airwolf Aerospace LLC
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01/14/2015
STC SR02394AK
Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system
Seaplanes North LLC
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07/08/2014
STC SR03353CH
Installation of Aspen Avionics Evolution Primary and Multi-Functional Flight Displays
AspenSTC Inc
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06/09/2014
STC SH3319NM
Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,
Precise Flight Inc
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07/25/2013
STC SH3319NM
Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,
Precise Flight Inc
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10/17/2012
STC SH3319NM
Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,
Precise Flight Inc
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05/23/2012
STC SR02394AK
Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system
Floats Alaska LLC
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03/15/2012
STC SR02394AK
Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system per Installation Instructions LED03-20R, Rev. IR, dated October 27, 2010.
Floats Alaska LLC
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02/21/2012
STC SH3319NM
Installation of Precise Pulselite Control System
Precise Flight Inc
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10/20/2010
STC SA00068SE (PAGE 1)
Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1)
Electronics International Inc.
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07/08/2005
STC SA00680SE (5 OF 6
Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer.
Electronics International
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03/21/2005
STC SR01430LA
Installation of Stainless Steel Skid shoes.
Papas Gary Los Angeles Laboratories Inc.
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03/09/1999
STC SA00680SE (5 OF 6
Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer.
Electronics International
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01/12/1996
STC SA00061LA
Installation of JPI digital tachometer.
J P Instruments
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10/13/1989
STC SA4302NM (PAGE 2)
Installation of Electronics Int'l digital automatic engine analyzer.
Electronics International
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10/13/1989
STC SA4302NM (PAGE 1)
Installation of Electronics Int'l digital automatic engine analyzer.
Electronics International
07 / PMA replacement parts
FAA-approved replacement parts for ENSTROM HELICOPTER CORP TH-28
4 parts on file from the FAA Parts Manufacturer Approval database. Each is a non-OEM part the FAA has authorized for use as a replacement on this aircraft type.
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7641-20#https://drs.faa.gov/browse/excelExternalWindow/8157D82DE34DE5EA86257CE00069889E.0001##
Lead-Acid Battery
Teledyne Battery Products replaces 7641-20
PMA holder → -
G-641#https://drs.faa.gov/browse/excelExternalWindow/6599721AF492E46786257CE00069889A.0001##
Lead-Acid Battery
Teledyne Battery Products replaces G-641
PMA holder → -
EN480‐AA‐17LiBS-L‐Man#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID179924502520240201162831.0001##
Installation Kit Enstrom 480 17AH Battery Airwolf LED Annunciator
Airwolf Aerospace LLC (formerly Airwolf Helicopter) replaces Modification Part
PMA holder → -
LBID-480-1A#https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID123019629420240201162831.0001##
Installation Drawing Enstrom 480 17AH Battery Airwolf LED Annunciator
Airwolf Aerospace LLC (formerly Airwolf Helicopter) replaces Modification Part
PMA holder →
04 / Regulations watching this type
Advisory Circulars and Federal Register activity for ENSTROM HELICOPTER CORP TH-28
Advisory Circulars
No ACs explicitly mention this type. Showing universal operating-rule ACs that apply to all aircraft.
Recent Federal Register activity
Latest rulemakings touching general operating rules (Part 91) and maintenance rules (Part 43).
- 2026-04-17 Settlement Policy for Small Unmanned Aircraft System (UAS) Cases FR ↗
- 2026-02-10 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period; Denial of Extension FR ↗
- 2026-02-02 25-Hour Cockpit Voice Recorder (CVR) Requirement, New Aircraft Production FR ↗
- 2026-01-28 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period FR ↗
- 2026-01-07 Requirements for Interference-Tolerant Radio Altimeter Systems FR ↗
05 / Aircraft of this type
All 1 registered N-numbers
Every tail currently on the FAA registry for this make/model. Click an N-number to query the FAA Aircraft Inquiry; rows flagged ● have NTSB events on file. Tails seeded with full TallyAero pages link directly.
| N-number | St | Year | NTSB | FAA |
|---|---|---|---|---|
| N28EN | MI | 1991 | · | Look up ↗ |
Source — FAA Aircraft Registry · click "Look up" to query the live registry record (owner, address, last airworthiness)
05 / Sources & Methodology
Every count traces back to a primary US-government source
- FAA Aircraft Registry →
Refreshed Apr 27, 2026
Available
- NTSB CAROL →
Refreshed Apr 27, 2026
Available
- Federal Register (FAA Airworthiness Directives) →
Refreshed Apr 27, 2026
Available
We render counts and lists as the agency publishes them. Read the methodology →