# N552EH: Enstrom Helicopter 480B - Status: Valid registration (dealer) - Airframe: [Enstrom Helicopter 480B](https://openairdocs.org/model/enstrom-helicopter-480b) (registry code 3300561, 5 seats) - Data sheets: [TCDS H1CE](https://openairdocs.org/tcds/H1CE) (The Enstrom Helicopter Corporation) (OpenAirDocs) - Serial number: 5266 - Type: Rotorcraft - Engine type: Turbo-shaft - Mode S code: A70745 - Registered owner: [Enstrom Helicopter Corp](https://openairdocs.org/faa-owner/ENSTROM%20HELICOPTER%20CORP) - Location: [Menominee, MI](https://openairdocs.org/faa-place/MI/Menominee) - Owner type: Corporation - Owner's area on the map: 45.2221° N, 87.5482° W: Placed by OpenAirDocs at the center of ZIP code 49858, 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=552EH - Page: https://openairdocs.org/aircraft/N552EH From the FAA registry file of October 24, 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. ## ADs that may apply (OpenAirDocs): 6 in force ### Matched by airframe (Enstrom Helicopter 480B) - [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 2017-26-03](https://openairdocs.org/ad/2017-26-03): Main Rotor System · Enstrom Helicopter Corporation, The 280, 280C, 280F and 11 more. Effective Jan 4, 2018 - [AD 2012-11-05](https://openairdocs.org/ad/2012-11-05): Main Rotor Control · Enstrom Helicopter Corporation, The 280C, 280F, 280FX and 6 more. Effective Jul 3, 2012 - [AD 2007-11-02](https://openairdocs.org/ad/2007-11-02): Main rotor push-pull control rod (push-pull rod) · Enstrom Helicopter Corporation, The 280, 280C, 280F and 7 more. Effective Oct 2, 2007 - [AD 2007-16-01](https://openairdocs.org/ad/2007-16-01): Main rotor blade retention pin (retention pin) · Enstrom Helicopter Corporation, The 280, 280C, 280F and 11 more. Effective Aug 15, 2007 - [AD 2001-25-02](https://openairdocs.org/ad/2001-25-02): Hub Plates · Enstrom Helicopter Corporation, The 480, 480B and TH-28. Effective Jan 15, 2002 ### Historical (superseded or no longer in force) - [AD 2021-23-13](https://openairdocs.org/ad/2021-23-13) (historical): Ground Proximity System · Airbus Helicopters K-225, K-190A, K-240 and 237 more.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 2011-26-10](https://openairdocs.org/ad/2011-26-10) (historical): Cyclic trim system · Enstrom Helicopter Corporation, The 280C, 280F, 280FX and 6 more. Effective Jan 23, 2012 ## Information bulletins (advisory) (2 in force) - [SAIB SW-12-45](https://openairdocs.org/saib/SW-12-45): Garmin Model 400W/500W Series GPS-WAAS Navigation System. Issued Oct 3, 2012 - [SAIB SW-05-81](https://openairdocs.org/saib/SW-05-81): . Issued Aug 17, 2005 ## NTSB investigations None matched to N552EH. ## FAA accident and incident reports None matched to N552EH. ## 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) (21) 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 (Enstrom Helicopter 480B) - [STC SR02813CH](https://openairdocs.org/stc/SR02813CH): Fabrication of Isolair Innovator II Model 3900-480 Spray System. Isolair Inc - [STC SR04637CH](https://openairdocs.org/stc/SR04637CH): Replacement of existing main ship battery with Lithium Ion Battery and installation of Annunciator Control Panel. Airwolf Aerospace LLC - [STC SR02120SE](https://openairdocs.org/stc/SR02120SE): Installation of Garmin GTN 6XX/7XX Navigation System. Garmin International Inc - [STC SR02704SE](https://openairdocs.org/stc/SR02704SE): Installation and maintenance of the Sunspot 36 and 46 series lights. AeroLED's Holdings LLC - [STC SR01067DE](https://openairdocs.org/stc/SR01067DE): Installation of main battery replacement with Concorde Lead-Acid battery. Concorde Battery Corporation - [STC SR03346CH](https://openairdocs.org/stc/SR03346CH): Installation of provisions for external equipment. Certex Aviation LLC - [STC SR02124SE](https://openairdocs.org/stc/SR02124SE): Installation functionality. of Data Garmin Required: transponders: (1) Garmin GTX Master 345/345R Drawing with List ADS-B (MDL), Out and In 005-00734-A4, functionality;. Garmin International Inc - [STC SR00359BO](https://openairdocs.org/stc/SR00359BO): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. Whelen Aerospace Technologies - [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 SR03465CH](https://openairdocs.org/stc/SR03465CH): Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-ECD-084-280, or AA-ECD-084-480. Airwolf Aerospace LLC - [STC SR03520NY](https://openairdocs.org/stc/SR03520NY): Installation of Rotor Head Cover. Spitfire Aerospace, LLC - [STC SR03208CH](https://openairdocs.org/stc/SR03208CH): Installation of Lifeport, Inc. MedDeck Litter Kit. Helicopter Specialties, Inc - [STC SR09643RC](https://openairdocs.org/stc/SR09643RC): Installation of the L3 AN/AR-154 TACAN System and Sandel SN3500 EHSI System. Helicopter Specialties, 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 SR03353CH](https://openairdocs.org/stc/SR03353CH): Installation of Aspen Avionics Evolution Primary and Multi-Functional Flight Displays. AspenSTC Inc - [STC SR02232LA](https://openairdocs.org/stc/SR02232LA): Installation of Garmin Model 400W / 500W Series GPS-WAAS Navigation System. Garmin AT Inc - [STC SR01430LA](https://openairdocs.org/stc/SR01430LA): Installation of Stainless Steel Skid shoes. Papas Gary Los Angeles Laboratories Inc - [STC SA00061LA](https://openairdocs.org/stc/SA00061LA): Installation of JPI digital tachometer. J P Instruments - [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International ## Related - Other Enstrom Helicopter 480B aircraft: https://openairdocs.org/model/enstrom-helicopter-480b/aircraft.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.