# Sikorsky S-51 - Type: Aircraft model (FAA registry) - Registry code: 8141102 - Manufacturer (registry): SIKORSKY - Model: S-51 - Aircraft type: Rotorcraft - Category: Rotorcraft - Engines: 1 · Reciprocating - Seats: 4 - Weight class: Up to 12,499 lb - Cruise speed: 77 mph - Certification: Type certificated - Data sheet: [TCDS H-2](https://openairdocs.org/tcds/H-2) (OpenAirDocs) - Holder: Sikorsky Aircraft Corporation - Registered aircraft: 0 - Page: https://openairdocs.org/model/sikorsky-s-51 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 67-29-06](https://openairdocs.org/ad/67-29-06): Tail Rotor Sleeve & Tube Assy · Sikorsky S-51. Effective Oct 31, 1967 - [AD 60-13-04](https://openairdocs.org/ad/60-13-04): Rotor Shank Rod · Orlando Helicopter Airways HRS-1/CH-19, HRS-3/H-19B, S-51 and 3 more - [AD 56-16-03](https://openairdocs.org/ad/56-16-03): Main Rotor Blade Inspection · Orlando Helicopter Airways HRS-1/CH-19, HRS-3/H-19B, S-51 and 3 more - [AD 56-13-02](https://openairdocs.org/ad/56-13-02): Main Rotor Hub Replacement · Sikorsky S-51 - [AD 51-23-04](https://openairdocs.org/ad/51-23-04): Rotor Link Assemblies · Sikorsky S-51 - [AD 51-22-01](https://openairdocs.org/ad/51-22-01): Gear Shaft Replacement · Sikorsky S-51 - [AD 50-08-01](https://openairdocs.org/ad/50-08-01): Tail Cone Mounting Longerons · Sikorsky S-51 - [AD 48-18-02](https://openairdocs.org/ad/48-18-02): Bevel Drive Gear Splines · Sikorsky S-51 - [AD 48-17-03](https://openairdocs.org/ad/48-17-03): Planet Pinion Shafts Wear · Sikorsky S-51 - [AD 47-50-08](https://openairdocs.org/ad/47-50-08): Vertical Hinge Pins · Sikorsky S-51 - [AD 47-32-15](https://openairdocs.org/ad/47-32-15): Control System Chain and Sprockets · Sikorsky S-51 Historical (superseded or no longer in force): - [AD 2021-23-13](https://openairdocs.org/ad/2021-23-13) (historical): Ground Proximity System · Airbus Helicopters K-225, K-190A, K-240 and 237 more.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 ## Registered aircraft None registered with this model now. ## NTSB investigations (1) 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 NYC76FHM20](https://openairdocs.org/ntsb/NYC76FHM20-149845), Feb 20, 1976: Sikorsky S-51 (N92868), Perkasie, PA, substantial damage ## FAA accident and incident reports (1) 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 19760220002479A](https://openairdocs.org/incident/19760220002479A), Feb 20, 1976: Skrsky S51 (N92868), Perkasie, PA, Substantial damage ## STCs that may be installed (OpenAirDocs) (10) 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 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 SA4-180](https://openairdocs.org/stc/SA4-180): Installation of VIP P/N 101-78 engine mounts. FTG, 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 SR00359BO](https://openairdocs.org/stc/SR00359BO): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. Whelen Aerospace Technologies - [STC SA01282NY](https://openairdocs.org/stc/SA01282NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K015 on aircraft powered by Pratt & Whitney radial reciprocating engine Series R-985, R-1340 and R-1830. Airwolf Filter Corporation - [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 SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories. Electronics International Inc - [STC SA1626NM PAGE 2](https://openairdocs.org/stc/SA1626NM%20PAGE%202): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series). Electronics International - [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International ## PMA parts (OpenAirDocs) (6) Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this model on its data sheet, so check the FAA record before relying on it. Newest first. - [MDL TD 031851](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID149000229620250508133548.0001): VA-1A( )AndAccessories. Electronics International Inc · PMA PQ0088NM · Modification part · Apr 10, 2025 - [01-0790906-00](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID143085942720220610124326.0001): LED Landing Light. Whelen Aerospace Technologies · PMA PQ1372CE · Modification part · Jun 6, 2022 - [VIP 101-78](https://drs.faa.gov/browse/excelExternalWindow/44F401D49D2BBEE7852570500056B23E.0001): Mount, Engine. Vibration Isolation Products · Replaces MB 100878 · Jun 11, 2003 - [A-058-000](https://drs.faa.gov/browse/excelExternalWindow/29F62B1708E1838C85257038006A789F.0001): Compass Glass. Aero Fabricators Inc · Modification part · Oct 3, 1995 - [82-01445-000](https://drs.faa.gov/browse/excelExternalWindow/8764373C40B23C06852570460060DAFD.0001): MAC 1700 Modification, Transceiver. McCoy Avionics Corp · Modification part · Mar 6, 1991 - [82-FSMOD-000](https://drs.faa.gov/browse/excelExternalWindow/3A7E349363C65253852570460060DAFE.0001): MAC 170A Modification, Transceiver. McCoy Avionics Corp · Modification part · Mar 6, 1991 ## The same model under other registry codes Amateur-built copies and renamed makers get their own codes. - [Malott Corwin S-51](https://openairdocs.org/model/malott-corwin-s-51): 1 registered aircraft, registry code 05630N6 - [Jim C Gohm S-51](https://openairdocs.org/model/jim-c-gohm-s-51): 1 registered aircraft, registry code 05634KD - [Rod Bower S-51](https://openairdocs.org/model/rod-bower-s-51): 1 registered aircraft, registry code 05635PI - [Doyle Michael J S-51](https://openairdocs.org/model/doyle-michael-j-s-51): 1 registered aircraft, registry code 05639R5 - [Hainline Charles H S-51](https://openairdocs.org/model/hainline-charles-h-s-51): 0 registered aircraft, registry code 05603Z6 - [Eldredge Kevin S51](https://openairdocs.org/model/eldredge-kevin-s51): 0 registered aircraft, registry code 05614DM --- 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.