# N478X: Sikorsky S-76C

- Status: Valid registration
- Airframe: [Sikorsky S-76C](https://openairdocs.org/model/sikorsky-s-76c) (registry code 8143008, 14 seats)
- Engine: [Turbomeca ARRIEL-1SER](https://openairdocs.org/engine/turbomeca-arriel-1ser) (registry code 60030)
- Data sheets: [TCDS H1NE](https://openairdocs.org/tcds/H1NE) (Sikorsky Aircraft Corporation) (OpenAirDocs)
- Serial number: 760493
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard
- Airworthiness date: November 3, 1998
- Certificate issued: December 5, 2022
- Expires: December 31, 2029
- Mode S code: A5E0DF
- Registered owner: [Westwind Helicopters Inc](https://openairdocs.org/faa-owner/WESTWIND%20HELICOPTERS%20INC)
- Location: [Santa Fe, TX](https://openairdocs.org/faa-place/TX/Santa%20Fe)
- Owner type: Corporation
- Owner's area on the map: 29.3489° N, 95.0916° W: Placed by OpenAirDocs at the center of ZIP code 77510, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=478X
- Page: https://openairdocs.org/aircraft/N478X

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): 33 in force

### Matched by airframe (Sikorsky S-76C)

- [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 2020-15-17](https://openairdocs.org/ad/2020-15-17): Indicating/recording system · Sikorsky S-76C. Effective Sep 9, 2020
- [AD 2019-19-12](https://openairdocs.org/ad/2019-19-12): Engine Fuel and Control · Sikorsky S-76C. Effective Nov 8, 2019
- [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 2012-22-13](https://openairdocs.org/ad/2012-22-13): Engine Controls · Sikorsky S-76C. Effective Dec 20, 2012
- [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 2010-06-08](https://openairdocs.org/ad/2010-06-08): Emergency flotation system squib connector · Sikorsky S-76C. Effective Apr 1, 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 99-07-01](https://openairdocs.org/ad/99-07-01): Rotorcraft Flight Manual - Operating Limitations · Sikorsky S-76C. Effective Apr 7, 1999
- [AD 99-01-09](https://openairdocs.org/ad/99-01-09): Fuel Supply Line · Sikorsky S-76C. Effective Mar 3, 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

### Matched by engine (Turbomeca ARRIEL-1SER)

None in force.

### 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 2018-10-07](https://openairdocs.org/ad/2018-10-07) (historical): Engine Controls · Sikorsky S-76C. Effective Jun 25, 2018
- [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 N478X.

## FAA accident and incident reports

None matched to N478X.

## Service difficulty reports (52, newest 50)

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 HEEA098568](https://openairdocs.org/sdr/HEEA098568), Nov 30, 2004: TRANSMITTER. FLUCTUATES. DURING CLIMB-OUT, MAIN GEARBOX PRESSURE FLUCTUATED FROM GREEN TO YELLOW RANGE THEN DROPPED TO ZERO. MAINTENANCE CLEANED THE CANNON PLUG CONNECTING TO THE TRANSM
- [SDR HEED089063](https://openairdocs.org/sdr/HEED089063), Sep 5, 2003: SPAR. CRACKED. CRACKED IN TAIL PYLON AFT SPAR WEB. RUN FROM LT SPAR TO RT SPAR.
- [SDR HEED089126](https://openairdocs.org/sdr/HEED089126), Mar 11, 2002: ACTUATOR. STUCK. LINEAR ACTUATOR STICKING. REPLACED UNIT.
- [SDR HEED089125](https://openairdocs.org/sdr/HEED089125), Mar 8, 2002: AHRS. INOPERATIVE. AHRS INOPERATIVE. OFF AND ON. REPLACED UNIT.
- [SDR HEED089124](https://openairdocs.org/sdr/HEED089124), Feb 19, 2002: TRANSDUCER. MALFUNCTIONED. TRANSDUCER AFFECTS PBA. REPLACED UNIT.
- [SDR HEED089122](https://openairdocs.org/sdr/HEED089122), Jan 16, 2002: AHRS. INTERMITTENT. AHRS INTERMITTANTLY INOPERATIVE, WILL NOT STAY ON LINE. REPLACED UNIT.
- [SDR HEED073508](https://openairdocs.org/sdr/HEED073508), Jun 14, 2001: ACTUATOR. INTERMITTENT. KICKING INTERMITTLY. REPLACED UNIT.
- [SDR HEED073507](https://openairdocs.org/sdr/HEED073507), Jun 14, 2001: CVR. WILL NOT TEST. FDR WILL NOT TEST. REPLACED UNIT.
- [SDR HEED073506](https://openairdocs.org/sdr/HEED073506), Jun 14, 2001: CONTROL UNIT. FAILED. NR 1 ENGINE RUN UP FAULT. REPLACED UNIT.
- [SDR HEED073505](https://openairdocs.org/sdr/HEED073505), Jun 14, 2001: ACTUATOR. CHATTERING. CHATTERING. REPLACED UNIT.
- [SDR HEED073494](https://openairdocs.org/sdr/HEED073494), Jun 14, 2001: BATTERY. DISCHARGED. WOULD CRANK AIRCRAFT ENGINES TO START BATTERY DEAD. VERY WEAK ON FIRST START OFTHE DAY. REPLACED UNIT.
- [SDR HEED073493](https://openairdocs.org/sdr/HEED073493), Jun 14, 2001: INDICATOR. FAILED. PIECES OF LED SECTIONS MISSING IN NUMBER DISPLAY. BURNED OUT. REPLACED UNIT.
- [SDR HEED073492](https://openairdocs.org/sdr/HEED073492), Jun 14, 2001: LIGHT. BURNED OUT. FLASH TUBE BURNED OUT. SCRAPPED REPLACED UNIT.
- [SDR HEED073491](https://openairdocs.org/sdr/HEED073491), Jun 14, 2001: ICS BOX. INTERMITTENT. INTERMITTENTLY TRANSMISSION ON ALL CHANNELS. REPLACED UNIT.
- [SDR HEED072208](https://openairdocs.org/sdr/HEED072208), Mar 14, 2001: MODULE. MALFUNCTIONED. HYD MODULE CAUSES INTERMITT 32 SYSTEM SERVO LITE. REPLACED UNIT.
- [SDR HEED072206](https://openairdocs.org/sdr/HEED072206), Mar 14, 2001: MIXER BOX. INTERMITTENT. INTERMITTLY INOPERATIVE COMPLETELY IN ALL SWITCH POSITIONS. REPLACED UNIT.
- [SDR HEED072205](https://openairdocs.org/sdr/HEED072205), Mar 14, 2001: MIXER BOX. INTERMITTENT. BOX CUTS OUT IN ICS. REPLACED UNIT.
- [SDR HEED065837](https://openairdocs.org/sdr/HEED065837), Jan 24, 2000: TACHOMETER. FAILED. N1 GAUGE DIGITAL LIGHTS CANNOT BE READ WHEN NON- FLIGHT INST. LIGHT SWITCH IS ON. REPLACED UNIT.
- [SDR HEED065836](https://openairdocs.org/sdr/HEED065836), Jan 24, 2000: TACHOMETER. FAILED. TURN ON ANALOG LIGHTS, DIGITAL GOES OFF. REPLACED UNIT.
- [SDR HEED065830](https://openairdocs.org/sdr/HEED065830), Jan 24, 2000: TURBINE. RUBBING. TURBINE RUB. REPLACED UNIT.
- [SDR HEED065825](https://openairdocs.org/sdr/HEED065825), Dec 22, 1999: SERVO. LEAKING. SERVO LEAKING. REPLACED UNIT.
- [SDR HEED065824](https://openairdocs.org/sdr/HEED065824), Dec 22, 1999: LINING. WORN. WORN BRAKE LINNING. REPLACED UNIT.
- [SDR HEED065813](https://openairdocs.org/sdr/HEED065813), Dec 21, 1999: ACTUATOR. INOPERATIVE. ACTUATOR INOPERATIVE. REPLACED UNIT.
- [SDR HEED065797](https://openairdocs.org/sdr/HEED065797), Dec 17, 1999: WHEEL. WORN. WHEEL WORN. REPLACED UNIT.
- [SDR HEED065794](https://openairdocs.org/sdr/HEED065794), Dec 17, 1999: PANEL. CRACKED. COVER PANEL FOR RIGHT HAND PASSENGER'S DOOR VENT CONTROL CRACKS AND MOUNT HOLES AND CORNER BROKEN OFF. REPLACED UNIT.
- [SDR HEED065779](https://openairdocs.org/sdr/HEED065779), Dec 17, 1999: INDICATOR. FAILED. DIGITAL LIGHTS. REPLACED UNIT.
- [SDR HEED065775](https://openairdocs.org/sdr/HEED065775), Dec 17, 1999: ACTUATOR. KICKING. ACTUATOR KICKS. REPLACED UNIT.
- [SDR HEED065774](https://openairdocs.org/sdr/HEED065774), Dec 17, 1999: ACTUATOR. KICKING. ACTUATOR KICKS. REPLACED UNIT.
- [SDR HEED065746](https://openairdocs.org/sdr/HEED065746), Dec 16, 1999: ENCODER. MALFUNCTIONED. ENCODING ALT. SENDS 020 ERROR CODE TO SKYWATCH IND DURING FLIGHT INTERMITTENTLY. SKY WATCH SYSTEM CYCLES OFF AND ON, 020 ERROR IS BAROMETRIC ALTITUDE INPUT. REP
- [SDR HEED065698](https://openairdocs.org/sdr/HEED065698), Dec 14, 1999: INDICATOR. MALFUNCTIONED. NR 2 NEEDLE WENT TO ZERO ON FUEL QUANTITY CONTROL.
- [SDR HEED064628](https://openairdocs.org/sdr/HEED064628), Nov 8, 1999: INDICATOR. STICKING. NR 1 AND NR 2 NEEDLES STICK AT 20 PERCENT ON TRIPLE TACHOMETER. REPLACED PART.
- [SDR HEED064627](https://openairdocs.org/sdr/HEED064627), Nov 8, 1999: INDICATOR. FLUCTUATING. N1 INDICATOR AFTER APPROXIMATELY 1 TO 1-1/2 HOURS OF OPERATION, INDICATOR NEEDLE STARTED FLUCTUATING FROM OPERATING RANGE TO ZERO AND BACK AGAIN. ALL TESTS AND 
- [SDR HEED064626](https://openairdocs.org/sdr/HEED064626), Nov 8, 1999: INDICATOR. MALFUNCTIONED. THE DIGITAL NUMBERS THAT WERE LIT UP, WERE BRIGHTER THAN THE OTHER N1 INDICATOR, IT WOULD PULL THE BRIGTHNESS OF ANY OTHER INDICATOR IT WAS PAIRED WITH DOWN TO 
- [SDR HEED064625](https://openairdocs.org/sdr/HEED064625), Nov 8, 1999: CLOCK. SLOW. CLOCK LOOSES 10 MINUTES EVERY DAY. REPLACED PART.
- [SDR HEED064624](https://openairdocs.org/sdr/HEED064624), Nov 8, 1999: SERVO. INTERMITTENT. PITCH BIAS ACTUATOR , PBA, IMTERMITTENTLY CAUSES AIRCRAFT TO PITCH UP OR DOWN DURING CRUISE FLIGHT. REPLACED PART.
- [SDR HEED064623](https://openairdocs.org/sdr/HEED064623), Nov 8, 1999: INDICATOR. FAILED. N1 INDICATOR NEEDLE STOPS MOVING IN-FLIGHT. CAN GET IT BACK IN OPERATIONAL BY DISCONNECTING ALL POWER THEN RECONNECTING POWER, BUT INDICATOR CONTINUES TO MALFUN
- [SDR HEED064622](https://openairdocs.org/sdr/HEED064622), Nov 8, 1999: SCREEN. BROKEN. INTAKE SCREEN HAD BROKEN WIRE. REPLACED PART.
- [SDR HEED064621](https://openairdocs.org/sdr/HEED064621), Nov 8, 1999: AMPLIFIER. ERRATIC. PILOT REPORTED ERRATIC PITCH BIAS ACTUATOR MOVEMENT. REPLACED PART.
- [SDR HEED064620](https://openairdocs.org/sdr/HEED064620), Nov 8, 1999: ALTIMETER. MALFUNCTIONED. INDICATOR OFF FLAG WILL NOT PULL WHEN INDICATOR POWERED UP, BUT INDICATOR WORKED OTHERWISE. REPLACED PART.
- [SDR HEED064619](https://openairdocs.org/sdr/HEED064619), Nov 8, 1999: INDICATOR. MALFUNCTIONED. INSTALLED IN AIRCRAFT ROTOR NEEDLE ADVANCED ABOVE NR 1, 32 ENGINE NEEDLES, ENGINE NEEDLES WOULD NOT MARRY WITH ROTOR NEEDLE, ROTOR NEEDLE 107 PERCENT, NR 1 ENGI
- [SDR HEED064587](https://openairdocs.org/sdr/HEED064587), Sep 22, 1999: BLADE. ERODED. EROSION OF PROTECTIVE RUBBER COATING ON LEADING EDGES OF TAIL ROTOR BLADE. REPLACED BLADE.
- [SDR HEED064586](https://openairdocs.org/sdr/HEED064586), Sep 22, 1999: BLADE. ERODED. EROSION OF PROTECTIVE RUBBER COATING ON LEADING EDGES OF TAIL ROTOR BLADE. REPLACED BLADE.
- [SDR HEED064579](https://openairdocs.org/sdr/HEED064579), Jun 25, 1999: HOUSING. CORRODED. TAIL ROTOR GEARBOX S/N: A239-00202 REMOVED FROM AIRCRAFT DUE TO LEAKING. FOUND OUTPUT HOUSING (ABOVE) QUADRANT ATTACHMENT BOLT HOLE AREA CORRODED. REPLACED WITH
- [SDR HEED064578](https://openairdocs.org/sdr/HEED064578), Jun 25, 1999: POWER SUPPLY. INOPERATIVE. POWER SUPPLY INOPERATIVE. ORDERED REPLACEMENT.
- [SDR HEED064577](https://openairdocs.org/sdr/HEED064577), Jun 25, 1999: INDICATOR. MALFUNCTIONED. N1 INDICATOR WENT TO ERR 2. ORDERED REPLACEMENT.
- [SDR HEED064558](https://openairdocs.org/sdr/HEED064558), Jun 16, 1999: INDICATOR. FAILED. N1 INDICATOR WILL NOT SELF-TEST WITHOUT RESETTING 3 OR 4 TIMES. ORDERED REPLACEMENT.
- [SDR HEED064557](https://openairdocs.org/sdr/HEED064557), Jun 16, 1999: INDICATOR. INTERMITTENT. GAUGE INDICATED ERR 3 INTERMITTENTLY. ORDERED REPLACEMENT.
- [SDR HEED064556](https://openairdocs.org/sdr/HEED064556), Jun 16, 1999: INDICATOR. FAILED. N1 INDICATOR FAILED OFFSHORE. ORDERED REPLACEMENT.
- [SDR HEED064555](https://openairdocs.org/sdr/HEED064555), Jun 16, 1999: INDICATOR. MALFUNCTIONED. GAUGE GOES TO ZERO IN-FLIGHT, HAPPENED TWICE ON 1-1/2 HOUR FLIGHT. ORDERED REPLACEMENT.
- [SDR HEED064554](https://openairdocs.org/sdr/HEED064554), Jun 16, 1999: INDICATOR. MALFUNCTIONED. N1 INDICATOR'S LED LIGHTS WILL NOT DIM. ORDERED REPLACEMENT.

All 52: https://openairdocs.org/aircraft/N478X/reports.md

## STCs that may be installed (OpenAirDocs) (352, 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-76C)

- [STC SR12301IB](https://openairdocs.org/stc/SR12301IB): Installation of Nginuity DAQ9000 as an alternate Flight Data Acquisition Unit (FDAU). 365 AEROSPACE DDS LIMITED
- [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 SR12106IB](https://openairdocs.org/stc/SR12106IB): Installation of Upgrade of Radar Altimeter for 5G Resiliency. Maxcraft Avionics Ltd
- [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 SR01367SE](https://openairdocs.org/stc/SR01367SE): Installation of Rockwell Collins Four Tube FDS 2000 Electronic Flight Instrument System (EFIS) and Rockwell Collins AHC 3000 Attitude Heading Reference System (AHRS). 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 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 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 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 SR04023CH](https://openairdocs.org/stc/SR04023CH): Install air ambulance conversion. Spectrum Aeromed LLC dba Spectrum Aeromed
- [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 SR02445NY-D](https://openairdocs.org/stc/SR02445NY-D): Installation of a Canadian Marconi (CMC) CMA-2012C in place of a RACAL 91 Doppler. RSG Products
- [STC SR01616SE](https://openairdocs.org/stc/SR01616SE): Installation of an engine air filter system. Aerometals
- [STC SR00763DE](https://openairdocs.org/stc/SR00763DE): Installation of a 62 Gallon Auxiliary Fuel Tank in the baggage compartment. Helifab Inc
- [STC SR09577RC](https://openairdocs.org/stc/SR09577RC): Installation of an Automatic Deployable Emergency Locator Transmitter (ADELT) System. Bristow US LLC
- [STC SR02455AK](https://openairdocs.org/stc/SR02455AK): Installation of a Honeywell Enhanced Ground Proximity Warning System (EGPWS). Vector Aerospace Helicopter Services USA Inc
- [STC SR02458AK](https://openairdocs.org/stc/SR02458AK): Installation of an LSI Helicopter Emergency Egress Lighting (HEEL) System. Vector Aerospace Helicopter Services USA Inc
- [STC SR02459AK](https://openairdocs.org/stc/SR02459AK): Installation of a Honeywell Multifunction Radar Display (MFRD). Vector Aerospace Helicopter Services USA Inc
- [STC SR02460AK](https://openairdocs.org/stc/SR02460AK): Installation of a Sagem Auxiliary Flight Data Acquisition & Management Unit (AFDAMU) & Fairchild Cockpit Voice & Data Recorder (CVDR) system. Vector Aerospace Helicopter Services USA Inc
- [STC SR02461AK](https://openairdocs.org/stc/SR02461AK): Installation of a Bendix/King KTA 970 TCAS 1 traffic collision avoidance system. Vector Aerospace Helicopter Services USA Inc
- [STC SR02462AK](https://openairdocs.org/stc/SR02462AK): Installation of a Garmin GPS 400 system. Vector Aerospace Helicopter Services USA Inc
- [STC SR02456AK](https://openairdocs.org/stc/SR02456AK): Installation of a D1000C Iridium Satcom Blue Sky System. Vector Aerospace Helicopter Services USA Inc
- [STC SR02457AK](https://openairdocs.org/stc/SR02457AK): Installation of an ACH1000 Advanced Control System Head for an Iridium Satcom Blue Sky System. Vector Aerospace Helicopter Services USA Inc

All 352: https://openairdocs.org/aircraft/N478X/stcs.md

## Related

- Other Sikorsky S-76C aircraft: https://openairdocs.org/model/sikorsky-s-76c/aircraft.md
- The Turbomeca ARRIEL-1SER engine: https://openairdocs.org/engine/turbomeca-arriel-1ser.md

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