# N751LL: Sikorsky S-76B - Status: Valid registration - Airframe: [Sikorsky S-76B](https://openairdocs.org/model/sikorsky-s-76b) (registry code 8143007, 14 seats) - Data sheets: [TCDS H1NE](https://openairdocs.org/tcds/H1NE) (Sikorsky Aircraft Corporation) (OpenAirDocs) - Serial number: 760318 - Type: Rotorcraft - Engine type: Turbo-shaft - Certificate issued: August 18, 1986 - Expires: January 31, 2028 - Mode S code: AA1EC5 - Registered owner: [State Of Illinois](https://openairdocs.org/faa-owner/STATE%20OF%20ILLINOIS) - Location: [Springfield, IL](https://openairdocs.org/faa-place/IL/Springfield) - Owner type: Government - Owner's area on the map: 39.8555° N, 89.6501° W: Placed by OpenAirDocs at the center of ZIP code 62707, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=751LL - Page: https://openairdocs.org/aircraft/N751LL 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): 35 in force ### Matched by airframe (Sikorsky S-76B) - [AD 2024-20-07](https://openairdocs.org/ad/2024-20-07): Emergency Equipment; Emergency Flotation Section · Apical Emergency Float Kit, P/N 20498 (STC SR00780LA or 12 others). Effective Dec 5, 2024 - [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 2022-05-10](https://openairdocs.org/ad/2022-05-10): Cabin Equipment/Furnishings · Airbus Helicopters AS332L, AS332L1, AS332L2 and 57 more. Effective Apr 20, 2022 - [AD 2017-19-01](https://openairdocs.org/ad/2017-19-01): Rotorcraft Flight Control · Sikorsky S-76A, S-76B, S-76C and 1 more. Effective Jan 2, 2018 - [AD 2015-26-10](https://openairdocs.org/ad/2015-26-10): Main Rotor Gearbox · Sikorsky S-76A, S-76B and S-76C. Effective Feb 9, 2016 - [AD 2015-19-51](https://openairdocs.org/ad/2015-19-51): Flight Control System · Sikorsky S-76A, S-76B, S-76C and 1 more. Effective Nov 10, 2015 - [AD 2015-04-05](https://openairdocs.org/ad/2015-04-05): Tail Rotor Drive Shaft · Sikorsky S-76A, S-76B, S-76C and 1 more. Effective Mar 12, 2015 - [AD 2014-08-06](https://openairdocs.org/ad/2014-08-06): Main Rotor Head · Sikorsky S-76A, S-76B and S-76C. Effective Jun 2, 2014 - [AD 2013-22-15](https://openairdocs.org/ad/2013-22-15): Main Rotor Head · Sikorsky S-76A, S-76B and S-76C. Effective Dec 13, 2013 - [AD 2013-06-51](https://openairdocs.org/ad/2013-06-51): Equipment/Furnishings · Agusta A109, A109A, A109A II and 43 more. Effective Jul 15, 2013 - [AD 2010-26-09](https://openairdocs.org/ad/2010-26-09): Navigation · Sikorsky S-76A, S-76B and S-76C. Effective Jan 12, 2011 - [AD 2010-17-16](https://openairdocs.org/ad/2010-17-16): Vertical Stabilizer · Sikorsky S-76A, S-76B and S-76C. Effective Oct 18, 2010 - [AD 2010-10-02](https://openairdocs.org/ad/2010-10-02): Servo actuator · Sikorsky S-76A, S-76B and S-76C. Effective Jun 17, 2010 - [AD 2010-07-02](https://openairdocs.org/ad/2010-07-02): Integrated navigation units (INUs) · 328 Support Services 328-100, 328-300, Jetstream Model 4101 and 26 more. Effective May 3, 2010 - [AD 2007-11-05](https://openairdocs.org/ad/2007-11-05): Main rotor shaft assembly (M/R shaft) · Sikorsky S-76A, S-76B and S-76C. Effective Jun 15, 2007 - [AD 2004-06-04](https://openairdocs.org/ad/2004-06-04): Dual channel autopilot and dual inverters · Sikorsky S-76A, S-76B and S-76C. Effective Apr 15, 2004 - [AD 2003-14-18](https://openairdocs.org/ad/2003-14-18): Main landing gear brake discs (discs) · Sikorsky S-76A, S-76B and S-76C. Effective Aug 25, 2003 - [AD 2003-04-15](https://openairdocs.org/ad/2003-04-15): Rotor Brake Disc (RBD) · Sikorsky S-76A, S-76B and S-76C. Effective Feb 27, 2003 - [AD 2002-21-07](https://openairdocs.org/ad/2002-21-07): Main rotor spindle attachment bolt · Sikorsky S-76A, S-76B and S-76C. Effective Nov 25, 2002 - [AD 2002-15-51](https://openairdocs.org/ad/2002-15-51): Main rotor blade · Sikorsky S-76A, S-76B and S-76C. Effective Oct 18, 2002 - [AD 2001-25-06](https://openairdocs.org/ad/2001-25-06): AHRS WARN Circuits · Sikorsky S-76B and S-76C. Effective Jan 4, 2002 - [AD 2001-10-06](https://openairdocs.org/ad/2001-10-06): Main Rotor Shaft Assembly · Sikorsky S-76A, S-76B and S-76C. Effective Jun 21, 2001 - [AD 2001-03-51](https://openairdocs.org/ad/2001-03-51): Main Rotor Shafts · Sikorsky S-76B and S-76C. Effective Mar 21, 2001 - [AD 2001-01-04](https://openairdocs.org/ad/2001-01-04): Rod Assembly · Sikorsky S-76A, S-76B and S-76C. Effective Feb 2, 2001 - [AD 2000-11-52](https://openairdocs.org/ad/2000-11-52): Main Rotor Blade · Sikorsky S-76A, S-76B and S-76C. Effective Aug 31, 2000 - [AD 99-19-30](https://openairdocs.org/ad/99-19-30): Tail Gearbox Forward Fairing · Sikorsky S-76A, S-76B and S-76C. Effective Oct 4, 1999 - [AD 98-17-15](https://openairdocs.org/ad/98-17-15): Swashplate Assembly Uniball Bearing Retainer Inspection · Sikorsky S-76A, S-76B and S-76C. Effective Feb 1, 1999 - [AD 96-15-03](https://openairdocs.org/ad/96-15-03): Drive Shaft Assemblies · Sikorsky S-76B. Effective Aug 19, 1996 - [AD 88-05-01 R1](https://openairdocs.org/ad/88-05-01-R1): Engine Support Cross Beam · Sikorsky S-76B. Effective Jul 16, 1990 - [AD 89-07-12](https://openairdocs.org/ad/89-07-12): Tail Rotor Horn · Sikorsky S-76A and S-76B. Effective Apr 27, 1989 - [AD 87-23-07 R1](https://openairdocs.org/ad/87-23-07-R1): Electrical Door Locking Actuators · Sikorsky S-76A and S-76B. Effective Jan 11, 1989 - [AD 87-25-02](https://openairdocs.org/ad/87-25-02): Ground Connections · Sikorsky S-76A and S-76B. Effective Dec 31, 1987 - [AD 87-12-06](https://openairdocs.org/ad/87-12-06): Generator Control Unit · Sikorsky S-76A and S-76B. Effective Jun 10, 1987 - [AD 86-19-14](https://openairdocs.org/ad/86-19-14): Tail Rotor Assembly · Sikorsky S-76A and S-76B. Effective Jan 30, 1987 - [AD 86-14-07](https://openairdocs.org/ad/86-14-07): Push Rod Assembly · Sikorsky S-76A and S-76B. Effective Oct 20, 1986 ### 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 2010-11-52](https://openairdocs.org/ad/2010-11-52) (historical): Navigation system · Sikorsky S-76A, S-76B and S-76C - [AD 2006-22-05](https://openairdocs.org/ad/2006-22-05) (historical): Integrated navigation units (INUs) · 328 Support Services 328-100, 328-300, Jetstream Model 4101 and 27 more. Effective Dec 1, 2006 - [AD 2005-22-01](https://openairdocs.org/ad/2005-22-01) (historical): Main rotor lower bifilar arm assembly · Sikorsky S-76A, S-76B and S-76C. Effective Nov 10, 2005 - [AD 2000-23-52](https://openairdocs.org/ad/2000-23-52) (historical): Main Rotor Shaft Assembly · Sikorsky S-76A Model/Series (all), S-76B and S-76C. Effective Feb 16, 2001 - [AD 2000-23-51](https://openairdocs.org/ad/2000-23-51) (historical): Main Transmission Oil Seal · Sikorsky S-76A Model/Series (all), S-76B and S-76C ## Information bulletins (advisory) (2 in force) - [SAIB AIR-20-11](https://openairdocs.org/saib/AIR-20-11): Attitude and Direction Data System, Incorrect AHRS Yaw Rate Output. Issued Jun 22, 2020 - [SAIB SW-08-37](https://openairdocs.org/saib/SW-08-37): Inoperative Cyclic Control Stick Guard. Issued Jul 22, 2008 ## NTSB investigations None matched to N751LL. ## FAA accident and incident reports None matched to N751LL. ## Service difficulty reports (2) As reported by operators and repair stations. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. - [SDR LX5R2011072000001](https://openairdocs.org/sdr/LX5R2011072000001), Jul 20, 2011: HYDRAULIC LINE. RUPTURED. WHILE IN CRUISE FLIGHT, THE CREW NOTICED THE "NR2 SERVO SYSTEM" CAUTION LIGHT. THEY THEN NOTICED THE NR2 HYD PRESSURE GAGE WAS GOING TO ZERO PRESSURE. THEY PROC - [SDR LX5R200700005](https://openairdocs.org/sdr/LX5R200700005), Aug 15, 2007: BREATHER TUBE. DISCONNECTED. DURING CRUISE FLIGHT THE BAGGAGE SMOKE WARNING LIGHT CAME ON, THE AIR CONDITIONER BLOWER WAS TURNED OFF AND THIS MADE NO EFFECT ON THE WARNING LIGHT. THE HELICO ## STCs that may be installed (OpenAirDocs) (333, 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 (Sikorsky S-76B) - [STC SR04465NY](https://openairdocs.org/stc/SR04465NY): Installation of the iPad Mount. Avio Design Group Inc - [STC SR02727SE](https://openairdocs.org/stc/SR02727SE): Installation and maintenance of the Sunspot 36 and 46 series lights. Whelen Aerospace Technologies - [STC SR268CH](https://openairdocs.org/stc/SR268CH): Installation of BFG FlightSystems TCAS I (Model TCAS-791/A). Acron Aviation Inc - [STC SR01955SE](https://openairdocs.org/stc/SR01955SE): Installation of a Supplemental Lighting System. Aviation Specialties Unlimited Inc - [STC SR02473AK](https://openairdocs.org/stc/SR02473AK): Installation of the L-3 Communications NGT-9000R/RD and NGT-9000/D ADS-B IN/OUT system. StandardAero Atlantic USA Inc - [STC SR09011RC](https://openairdocs.org/stc/SR09011RC): Manufacture of an emergency exit window in passenger door. HELIFAB - [STC SR09211RC](https://openairdocs.org/stc/SR09211RC): Installation of an external mount life raft deployment system. HELIFAB - [STC SR09355RC](https://openairdocs.org/stc/SR09355RC): Installation of 12 place passenger seats. HELIFAB - [STC SR02352AK](https://openairdocs.org/stc/SR02352AK): Installation of an AXSYS FLIR Camera System. Helifab - [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 SR00112BO](https://openairdocs.org/stc/SR00112BO): Installation of either the OuterLink Corporation CP-2 or CP-3i SATCOM System in accordance with OuterLink Corporation Master Document List No. D000-0042, Revision N, dated August 19, 2009, or later FAA-approved revision. Outerlink Corporation - [STC SR01520SE](https://openairdocs.org/stc/SR01520SE): Installation of a Modularized Main DC Electrical Junction Box. Helifab - [STC SR04609NY](https://openairdocs.org/stc/SR04609NY): Installation of Garmin HTAWS (Helicopter Terrain Awareness Warning System). Maxcraft Avionics Ltd - [STC SR02322AK](https://openairdocs.org/stc/SR02322AK): Installation of a fixed mounted Max-Vis Enhanced Vision System (EVS) Model 1500. PECO Inc - [STC SH3200NM](https://openairdocs.org/stc/SH3200NM): Installation of dual Sperry SPZ-7000 digital automatic flight control systems. Honeywell International Inc - [STC SR00925DE](https://openairdocs.org/stc/SR00925DE): Installation of Garmin GTX 335/335R and GTX345/345R transponders to provide ADS-B Out and In functionality. Peregrine - [STC SH2224NM](https://openairdocs.org/stc/SH2224NM): Installation of dual Sperry EDZ-705 Electronic Flight Instrument Systems, (EFIS). Honeywell International Inc - [STC SR04440NY](https://openairdocs.org/stc/SR04440NY): Installation of the Mid Continent MD302 Standby Attitude Module. Maxcraft Avionics Ltd - [STC SR02667SE](https://openairdocs.org/stc/SR02667SE): Installation of a Honeywell ASPIRE 200 Intermediate Gain (IG) SATCOM system. Honeywell International - [STC SR00764DE](https://openairdocs.org/stc/SR00764DE): Installation of Automatic Dependent Surveillance - Broadcast (ADS-B) Out functionality using the Trig Avionics TT22 Transponder and Freeflight Systems 1201 Global Positioning System (GPS) with Wide Area Augmentation System (WAAS). Peregrine - [STC SH5778SW](https://openairdocs.org/stc/SH5778SW): Addition of Electrically Driven Vapor Cycle, Freon or Refrigerant R-134a, Air Conditioning System. Air Comm Corporation - [STC SR00162DE-D](https://openairdocs.org/stc/SR00162DE-D): Installation of a LifePort 'PLUS' system. LifePort LLC - [STC SR00391DE](https://openairdocs.org/stc/SR00391DE): Installation of TREC dual patient handling system. LifePort LLC - [STC SR02125LA](https://openairdocs.org/stc/SR02125LA): Installation of a One Man Loading Patient Litter System. LifePort LLC - [STC SR02611NY-D](https://openairdocs.org/stc/SR02611NY-D): Installation of the LifePort One Man Loading Patient Litter System. LifePort LLC - [STC SH8678SW](https://openairdocs.org/stc/SH8678SW): Installation of an electronic bay access door window. The NORDAM Group LLC - [STC SH8679SW](https://openairdocs.org/stc/SH8679SW): Installation of a chin window. The NORDAM Group LLC - [STC SR00847DE](https://openairdocs.org/stc/SR00847DE): Replacement of Honeywell (formerly Sperry) ED-800 cathode ray tube (CRT) display, part number (p/n) 7003110-901/-902, with Esterline CMC Electronics CMA-6800 multi-purpose liquid crystal display (LCD), p/n 100-604045-001/-002, respectively. Peregrine - [STC SR03551NY](https://openairdocs.org/stc/SR03551NY): Installation of Garmin GTX33H Mode S Transponder and GTS Traffic System. Maxcraft Avionics Ltd - [STC SR03573NY](https://openairdocs.org/stc/SR03573NY): Installation of Garmin GTN/GNS() Navigation with EDZ-705 or EDZ-756 EFIS. Maxcraft Avionics Ltd - [STC SR04227NY](https://openairdocs.org/stc/SR04227NY): Installation of Garmin GWX Weather Radar System. Maxcraft Avionics Ltd - [STC SR00256BO](https://openairdocs.org/stc/SR00256BO): Installation of Universal Avionics Systems Corporation (UASC) Software Control Number (SCN) 31.X in UASC Cockpit Display Computer (UCDC) P/N 3040-05-( ). Pro Star Aviation, LLC - [STC SR00264BO](https://openairdocs.org/stc/SR00264BO): Installation of Garmin GMX 200 Multi Function Display. Pro Star Aviation, LLC - [STC SR00274BO](https://openairdocs.org/stc/SR00274BO): Installation of an L3 Communications GH-3100 Electronic Standby Instrument System (ESIS) and Optional Emergency Bus. Pro Star Aviation, LLC - [STC SR00275BO](https://openairdocs.org/stc/SR00275BO): Installation of tail shaft cover antenna mount. Pro Star Aviation, LLC - [STC SR00287BO](https://openairdocs.org/stc/SR00287BO): Installation of a single UNS-1Fw/Lw Flight Management System (FMS) with embedded Wide Area Augmentation System and a Universal LP/LPV Monitor in accordance with ProStar Installation Data List (IDL) No. 20819-IDL-01, Revision E, dated 4 Feburary 2011, or later FAA-approved revisions. Pro Star Aviation, LLC - [STC SR00289BO](https://openairdocs.org/stc/SR00289BO): Installation ofa Kollsman General Aviation Vision System (GAViS ). Pro Star Aviation, LLC - [STC SR04022NY](https://openairdocs.org/stc/SR04022NY): AF-ADELT improved installation. Caledonian Airborne Systems Ltd Caledonian House - [STC SR09570RC](https://openairdocs.org/stc/SR09570RC): Installation of Night Vision Goggle Compatible Lighting System. U.S. Cutoms and Border Protection L&M Rotary Wing Program Office - [STC SR00763DE](https://openairdocs.org/stc/SR00763DE): Installation of a 62 Gallon Auxiliary Fuel Tank in the baggage compartment. Helifab Inc - [STC SR03441CH](https://openairdocs.org/stc/SR03441CH): Installation of TrueView Enhanced Vision System (EVS) T6-Series. Mayday Avionics Inc - [STC SR09626RC](https://openairdocs.org/stc/SR09626RC): Installation of an aft cabin area Storage Net. Helifab Inc - [STC SR03498NY](https://openairdocs.org/stc/SR03498NY): Install IONode Flight Data Monitor. Maxcraft Avionics Ltd - [STC SH570NE](https://openairdocs.org/stc/SH570NE): Installation of door stops. Sikorsky Aircraft Corporation - [STC SH765NE](https://openairdocs.org/stc/SH765NE): Installation of an opening camera window. Sikorsky Aircraft Corporation - [STC SR00033NY](https://openairdocs.org/stc/SR00033NY): Installation of grease fittings. Sikorsky Aircraft Corporation - [STC SR00085NY](https://openairdocs.org/stc/SR00085NY): Installation of Bendix/King Model CAS 66A TCAS 1, System. Sikorsky Aircraft Corporation - [STC SR00275NY](https://openairdocs.org/stc/SR00275NY): Installation of Medevac (EMS) Interior. Sikorsky Aircraft Corporation - [STC SR00285NY](https://openairdocs.org/stc/SR00285NY): Installation of Medevac (EMS) Interior. Sikorsky Aircraft Corporation - [STC SR00533NY](https://openairdocs.org/stc/SR00533NY): Drain cup installation. Sikorsky Aircraft Corporation All 333: https://openairdocs.org/aircraft/N751LL/stcs.md ## Related - Other Sikorsky S-76B aircraft: https://openairdocs.org/model/sikorsky-s-76b/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.