# N151EC: 1969 Garlick Helicopters OH-58A - Status: Valid registration - Airframe: [Garlick Helicopters OH-58A](https://openairdocs.org/model/garlick-helicopters-oh-58a) (registry code 3740002, 4 seats) - Engine: [Allison 250-C20B](https://openairdocs.org/engine/allison-250-c20b) (registry code 03081) - Data sheets: [TCDS R00006DE](https://openairdocs.org/tcds/R00006DE) (Henry Helicopters LLC), [TCDS E4CE](https://openairdocs.org/tcds/E4CE) (Rolls-Royce Corporation) (OpenAirDocs) - Serial number: MB-1 - Year built: 1969 - Type: Rotorcraft - Engine type: Turbo-shaft - Airworthiness: Experimental, exhibition - Airworthiness date: July 12, 2010 - Certificate issued: May 13, 2015 - Expires: May 31, 2028 - Mode S code: A0CE4D - Registered owner: [Ecolift Corp](https://openairdocs.org/faa-owner/ECOLIFT%20CORP) - Location: San Juan, PR, RQ - Owner type: Corporation - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=151EC - Page: https://openairdocs.org/aircraft/N151EC 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. ## ADs that may apply (OpenAirDocs): 17 in force ### Matched by airframe (Garlick Helicopters OH-58A) None in force. ### Matched by engine (Allison 250-C20B) - [AD 2022-10-06](https://openairdocs.org/ad/2022-10-06): Turbine Section · Rolls-Royce 250-C20, 250-C20B, 250-C20C (T63-A-720) and 9 more. Effective Jun 28, 2022 - [AD 2018-13-01](https://openairdocs.org/ad/2018-13-01): Turbine Governor · Rolls-Royce 250-C10 (T63-A-5), 250-C18, 250-C18A and 24 more. Effective Aug 16, 2018 - [AD 2006-16-04](https://openairdocs.org/ad/2006-16-04): Inspection of the fuel nozzle screen · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 43 more. Effective Sep 7, 2006 - [AD 2006-13-06](https://openairdocs.org/ad/2006-13-06): Gas producer rotor assembly tie bolts · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 16 more. Effective Jul 26, 2006 - [AD 2005-10-13](https://openairdocs.org/ad/2005-10-13): Turbine energy absorbing ring · Rolls-Royce 250-B17B, 250-B17C, 250-B17D and 7 more. Effective Jun 22, 2005 - [AD 2004-26-09](https://openairdocs.org/ad/2004-26-09): Compressor Adaptor Couplings · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 8 more. Effective Feb 8, 2005 - [AD 2001-24-12](https://openairdocs.org/ad/2001-24-12): Helical Torquemeter Gearshaft Assembly · Rolls-Royce 250-B17, 250-B17C, 250-B17D and 13 more. Effective Dec 19, 2001 - [AD 98-24-28](https://openairdocs.org/ad/98-24-28): Main Fuel Control Bellows · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 36 more. Effective Jan 7, 1999 - [AD 96-19-01](https://openairdocs.org/ad/96-19-01): Superior Air Parts Manufacture Approval (PMA) Bearings · Rolls-Royce 250-B15G, 250-B17F, 250-B17F/1 and 17 more. Effective Sep 26, 1996 - [AD 88-17-01](https://openairdocs.org/ad/88-17-01): Fuel Controls · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 26 more. Effective Mar 1, 1989 - [AD 83-03-02 R1](https://openairdocs.org/ad/83-03-02-R1): Slotted Third Stage Turbine Wheels · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 5 more. Effective Feb 28, 1984 - [AD 82-24-05](https://openairdocs.org/ad/82-24-05): Control Assembly and Power Turbine Governor Assembly · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 43 more. Effective Nov 26, 1982 - [AD 82-13-03](https://openairdocs.org/ad/82-13-03): Modify Engine High Pressure Fuel Control Filter Assembly · Rolls-Royce 250-C20 and 250-C20B. Effective Jul 1, 1982 - [AD 79-21-01 R1](https://openairdocs.org/ad/79-21-01-R1): Third Stage Turbine Wheel Blade · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 3 more. Effective Jun 3, 1981 - [AD 78-14-08](https://openairdocs.org/ad/78-14-08): Fuel Pump Drive Spline · Rolls-Royce 250-C18, 250-C18A, 250-C18B and 3 more. Effective Oct 24, 1979 - [AD 77-15-12](https://openairdocs.org/ad/77-15-12): Power Turbine Coupling Nut · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 23 more. Effective Sep 23, 1977 - [AD 77-09-08](https://openairdocs.org/ad/77-09-08): Bleed Valve Diaphragm · Rolls-Royce 250-B17, 250-B17B, 250-C20 and 2 more. Effective Jul 18, 1977 ### Historical (superseded or no longer in force) - [AD 2017-18-14](https://openairdocs.org/ad/2017-18-14) (historical): Turbine Section · Rolls-Royce 250-C20, 250-C20B, 250-C20F and 8 more. Effective Oct 13, 2017 - [AD 2015-02-22](https://openairdocs.org/ad/2015-02-22) (historical): Repetitive visual inspections · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 15 more. Effective Mar 9, 2015 - [AD 2012-14-06](https://openairdocs.org/ad/2012-14-06) (historical): Released turbine blades and shrouds · Rolls-Royce 250-C20, 250-C20B and 250-C20R/2. Effective Aug 14, 2012 - [AD 2004-24-09](https://openairdocs.org/ad/2004-24-09) (historical): Fuel nozzle · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 40 more. Effective Jan 5, 2005 - [AD 2001-20-51](https://openairdocs.org/ad/2001-20-51) (historical): Helical Torquemeter Gearshaft Assembly · 250-B17, 250-B17C, 250-B17D and 12 more ## Information bulletins (advisory) (1 in force) - [SAIB SW-07-37R1](https://openairdocs.org/saib/SW-07-37R1): Corrosion on Main Rotor Blade. Issued Jun 21, 2007 - [SAIB SW-07-37](https://openairdocs.org/saib/SW-07-37) (historical): Corrosion found in area around the inertia weight on main rotor blades. Issued Jun 8, 2007 ## NTSB investigations None matched to N151EC. ## FAA accident and incident reports None matched to N151EC. ## 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) (52, 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 (Garlick Helicopters OH-58A) - [STC SR00912SE](https://openairdocs.org/stc/SR00912SE): Replacement of the original landing gear skid tubes and saddles with DART Aerospace Model D058-672-011 and 012, or D058-672-013 and 014 skid tubes and saddles. Dart Aerospace USA Inc - [STC SR00915SE](https://openairdocs.org/stc/SR00915SE): Installation of DART Heli-Access-Step, Models D058-677-011 AND-012, or D058-677-013 AND -014 fabricated. Dart Aerospace USA Inc - [STC SR00916SE](https://openairdocs.org/stc/SR00916SE): Installation of DART Model D058-678-011 Bearpaws. Dart Aerospace USA Inc - [STC SR01727SE](https://openairdocs.org/stc/SR01727SE): Fabrication of Boundary Layer Research (BLR) Dual Tail Boom Strake System. BLR Aerospace LLC - [STC SR02964CH](https://openairdocs.org/stc/SR02964CH): Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-206-011-154-105/-107. Airwolf Filter Corporation - [STC SR00180SE](https://openairdocs.org/stc/SR00180SE): Installation of an engine air filter. Aerometals - [STC SR01286AT](https://openairdocs.org/stc/SR01286AT): Manufacture of crew vertical slide window. Bell Helicopter Textron Inc - [STC SR01287AT](https://openairdocs.org/stc/SR01287AT): Manufacture of passenger vertical slide window. Bell Helicopter Textron Inc - [STC SR01288AT](https://openairdocs.org/stc/SR01288AT): Manufacture of rubber mounted crew and passenger wedge windows. Bell Helicopter Textron Inc - [STC SR01317AT](https://openairdocs.org/stc/SR01317AT): Manufacture of folding maintenance step. Bell Helicopter Textron Inc - [STC SR01337AT](https://openairdocs.org/stc/SR01337AT): Manufacture of rubber mounted chin bubble window. Bell Helicopter Textron Inc - [STC SR01338AT](https://openairdocs.org/stc/SR01338AT): Manufacture of pre-flight step/handle. Bell Helicopter Textron Inc - [STC SR01358AT](https://openairdocs.org/stc/SR01358AT): Manufacture of maintenance step assembly. Bell Helicopter Textron Inc - [STC SR01409AT](https://openairdocs.org/stc/SR01409AT): Manufacture of replacement windshield and windows. Bell Helicopter Textron Inc - [STC SR01410AT](https://openairdocs.org/stc/SR01410AT): Manufacture of Flitestep. Bell Helicopter Textron Inc - [STC SR01446AT](https://openairdocs.org/stc/SR01446AT): Manufacture of replacement engine cowling. Bell Helicopter Textron Inc - [STC SR01447AT](https://openairdocs.org/stc/SR01447AT): Manufacture of Tailrotor Pedal Lockout. Bell Helicopter Textron Inc - [STC SR01448AT](https://openairdocs.org/stc/SR01448AT): Manufacture of Baggage Door. Bell Helicopter Textron Inc - [STC SR02031AT](https://openairdocs.org/stc/SR02031AT): Manufacture of Vibration Reduction System. Bell Helicopter Textron Inc - [STC SR01449AT](https://openairdocs.org/stc/SR01449AT): Manufacture of replacement Transmission Cowling Doors in accordance with Aeronautical Accessories, Inc. Report No. AA-97079, no revision, dated June 5, 1997 or later FAA approved revisions and installation per Report No. AA-96063, Revision A, dated May 6, 1997, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01450AT](https://openairdocs.org/stc/SR01450AT): Manufacture of Rappelling Fixture (structural provisions only) in accordance with Aeronautical Accessories, Inc. Report No. AA-97082, no revision, dated May 9, 1997 or later FAA approved revisions and installation per Report No. AA-87045, Revision L, dated May 9, 1997, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01451AT](https://openairdocs.org/stc/SR01451AT): Manufacture of Range Extender in accordance with Aeronautical Accessories, Inc. Report No. AA-96211, no revision, dated December 20, 1996 or later FAA approved revisions and installation per Report No. AA-95021, Revision F, dated December 19, 1996, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01456AT](https://openairdocs.org/stc/SR01456AT): Manufacture of Raingutters in accordance with Aeronautical Accessories, Inc. Report No. AA-97081, no revision dated May 8, 1997 or later FAA approved revisions and installation per Report No. AA-86020, Revision B, dated May 7, 1997, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01462AT](https://openairdocs.org/stc/SR01462AT): Manufacture of Door Openers in accordance with Aeronautical Accessories, Inc. Report No. AA-97046, Revision A, dated April 28, 1997 or later FAA approved revisions and installation per Report No. AA-96108, Revision A, dated June 25, 1996, or Report No. AA-96064, Revision C, dated April 15, 1997, or Report No. AA-95051, Revision B, dated April 10, 1997, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01463AT](https://openairdocs.org/stc/SR01463AT): Manufacture of Cargo Mirror in accordance with Aeronautical Accessories, Inc. Report No. AA-97109, no revision, dated July 2, 1997 or later FAA approved revisions and installation per Report No. AA-97072, no revision, dated June 27, 1997, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01464AT](https://openairdocs.org/stc/SR01464AT): Manufacture of Baggage Compartment Extension, Spacemaker in accordance with Aeronautical Accessories, Inc. Report No. AA-97080, no revision, dated July 28, 1997 or later FAA approved revisions and installation per Report No. AA-97064, no revision, dated April 9, 1997, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01469AT](https://openairdocs.org/stc/SR01469AT): Manufacture of High Skid Landing Gear in accordance with Aeronautical Accessories, Inc. Report No. AA-97077, Revision A, dated August 14, 1997 or later FAA approved revisions and installation per Report No. AA-95050, Revision G, dated February 6, 1997, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01477AT](https://openairdocs.org/stc/SR01477AT): Manufacture of crew and passenger windows in accordance with Aeronautical Accessories, Inc. Report No. AA-97076, no revision, dated April 30, 1997 or later FAA approved revisions and installation per Report No. AA-97056, no revision, dated March 31, 1997, or Report No. AA-97057, no revision, dated April 1, 1997, or Report No. AA-97058, no revision, dated April 1, 1997, or Report No. AA-97059, no revision, dated April 1, 1997, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01493AT](https://openairdocs.org/stc/SR01493AT): Manufacture of Collective Safety Cover in accordance with Aeronautical Accessories, Inc. Report No. AA-97054, no revision, dated April 1, 1997 or later FAA approved revisions and installation per Report No. AA-96065, Revision A, dated April 1, 1997, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01494AT](https://openairdocs.org/stc/SR01494AT): Manufacture of Cyclic Support Safety Cover in accordance with Aeronautical Accessories, Inc. Report No. AA-97053, no revision, dated March 28, 1997 or later FAA approved revisions and installation per Report No. AA-96067, no revision, dated April 25, 1996, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01495AT](https://openairdocs.org/stc/SR01495AT): Manufacture of Baggage Floor Protectors in accordance with Aeronautical Accessories, Inc. Report No. AA-97051, no revision, dated March 27, 1997 or later FAA approved revisions and installation per Report No. AA-95046, Revision A, dated March 13, 1997, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01496AT](https://openairdocs.org/stc/SR01496AT): Manufacture of Interior Trim in accordance with Aeronautical Accessories, Inc. Report No. AA-97060, no revision, dated April 1, 1997 or later FAA approved revisions and installation per Report No. AA-96030, Revision A, dated March 4, 1997, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01601AT](https://openairdocs.org/stc/SR01601AT): Manufacture of Air Deflectors in accordance with Aeronautical Accessories, Inc. Report No. AA-98034, no revision, dated February 27, 1998 or later FAA approved revisions and installation per Report No. AA-98022, no revision, dated February 27, 1998, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01602AT](https://openairdocs.org/stc/SR01602AT): Manufacture of Emergency Flotation System Kit in accordance with Aeronautical Accessories, Inc. Report No. AA-97101, no revision, dated July 18, 1997 or later FAA approved revisions and installation per Report No. AA-97030, no revision, dated July 16, 1997, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01609AT](https://openairdocs.org/stc/SR01609AT): Manufacture of Crew Shoulder Harness Restraint System in accordance with Aeronautical Accessories, Inc. Report No. AA-97069, no revision, dated May 16, 1997 or later FAA approved revisions and installation per Report No. AA-96024, Revision A, dated November 5, 1996, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01610AT](https://openairdocs.org/stc/SR01610AT): Manufacture of Passenger Shoulder Harness Restraint System in accordance with Aeronautical Accessories, Inc. Report No. AA-97085, no revision, dated May 16, 1997 or later FAA approved revisions and installation per Report No. AA-97083, no revision, dated May 15, 1997, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01619AT](https://openairdocs.org/stc/SR01619AT): Manufacture of Quick Mount Kit for Nightsun Model SX-16 Searchlight in accordance with Aeronautical Accessories, Inc. Report No. AA-97106, no revision, dated July 18, 1997 or later FAA approved revisions and installation per Report No. AA-97102, no revision, dated June 20, 1997, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR01620AT](https://openairdocs.org/stc/SR01620AT): Manufacture of Quick Mount Kit for Starbust Model SX-5 Searchlight in accordance with Aeronautical Accessories, Inc. Report No. AA-98029, no revision, dated February 26, 1998 or later FAA approved revisions and installation per Report No. AA-98023, Revision A, dated February 18, 1998, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR02021AT](https://openairdocs.org/stc/SR02021AT): Manufacture of Replacement Locking Door Handle in accordance with Aeronautical Accessories, Inc. Report No. AA-98026, no revision, dated February 11, 1998 or later FAA approved revisions and installation per Report No. AA-96072, Revision D, dated February 11, 1998, or later FAA approved revision. Bell Helicopter Textron Inc - [STC SR01492AT](https://openairdocs.org/stc/SR01492AT): Manufacture of Cabin Floor Protectors in accordance with Aeronautical Accessories, Inc. Report No. AA-97052, no revision, dated March 27, 1997 or later FAA approved revisions and installation per Report No. AA-95047, no revision, dated April 28, 1995, or later FAA approved revisions. Bell Helicopter Textron Inc - [STC SR00756NY](https://openairdocs.org/stc/SR00756NY): Installation of a Avionics Specialities, Inc Power Analyzer and Recorder (PAR) P/N SL17080. Aerosonic Corporation - [STC SR00431SE](https://openairdocs.org/stc/SR00431SE): Installation of Ag-Air Systems, Inc., hydraulic accessory drive system. (206B BII, BIII) (OH-58A+ RESTRICTED CATEGORY ARROW FALCON). Kawak Aviation Technologies Inc - [STC SR00900SE](https://openairdocs.org/stc/SR00900SE): Replacement of the original forward and aft left-hand cabin door wedge windows with Garlick window part numbers OH58W-1004-43 and OH58W-1005-43, respectively. Garlick parts are fabricated and installed in accordance with Garlick Master Drawing List (MDL) No. 990115, dated May 13, 1999, or later Federal Aviation Administration (FAA) approved revision. These replacement parts must be maintained in accordance with U.S. Army Aviation Unit and Intermediate Maintenance Manual No. TM-1520-228-23-1 for OH-58A and OH-58C Helicopters, Paragraphs 2-123 through 2-128, dated May 25, 1984, or later FAA approved revision. Garlick Helicopters Inc - [STC SR00305DE](https://openairdocs.org/stc/SR00305DE): Installation of Simplex Model 4900-010 spray system. Simplex Manufacturing Company - [STC SH4173NM](https://openairdocs.org/stc/SH4173NM): Installation of Simplex Model 7600 modular electrical system. (US ARMY OH-13E M74A). Simplex Manufacturing Company ### Approved for the engine (Allison 250-C20B) - [STC SE5511NM](https://openairdocs.org/stc/SE5511NM): Installation of compressor discharge pressue (PC) valve. Bell Helicopter Textron Inc - [STC SE769NW](https://openairdocs.org/stc/SE769NW): Installation of Soloy Part No. 250-1001-1 fuel line. Siam Hiller Holdings Inc - [STC SE00014EN](https://openairdocs.org/stc/SE00014EN): Installation of the Pratt & Whitney Engine Services, Inc. CrossCheck Engine Monitor Kit P/N HUMS-K-071-1, Rev. A on the specified PT6A engine models and kit P/N HUMS-K-071-2 on the specified A250 engine models. Pratt & Whitney Engine Services Inc - [STC SE00027EN](https://openairdocs.org/stc/SE00027EN): Installation of Pratt & Whitney Engine Services Inc. Intellistart plus electronic control unit (ECU), P/N DPU-K-010 on the specified 250 engine models. Pratt & Whitney Engine Services Inc - [STC SE492GL](https://openairdocs.org/stc/SE492GL): Incorporation of a fuel flow transducer. Shadin Avionics All 52: https://openairdocs.org/aircraft/N151EC/stcs.md ## Earlier aircraft with N151EC The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N151EC before. - [Cancelled 1998-04-14](https://openairdocs.org/deregistered/N151EC-1998-04-14): Cook RS-15, S/N 27. Triennial form not returned. Owner: [Gillespie John T](https://openairdocs.org/faa-owner/GILLESPIE%20JOHN%20T), [Woodinville, WA](https://openairdocs.org/faa-place/WA/Woodinville) ## Related - Other Garlick Helicopters OH-58A aircraft: https://openairdocs.org/model/garlick-helicopters-oh-58a/aircraft.md - The Allison 250-C20B engine: https://openairdocs.org/engine/allison-250-c20b.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.