# N470QL: 1989 Bell 412 - Status: Valid registration - Airframe: [Bell 412](https://openairdocs.org/model/bell-412) (registry code 1182202, 15 seats) - Engine: [Pratt & Whitney Canada PT6T-3 series](https://openairdocs.org/engine/pratt-whitney-canada-pt6t-3-series) (registry code 52103) - Data sheets: [TCDS H4SW](https://openairdocs.org/tcds/H4SW) (Bell Textron Inc.), [TCDS E22EA](https://openairdocs.org/tcds/E22EA) (Pratt & Whitney Canada Corp.) (OpenAirDocs) - Serial number: 33200 - Year built: 1989 - Type: Rotorcraft - Engine type: Turbo-shaft - Airworthiness: Standard, transport - Airworthiness date: August 24, 1990 - Certificate issued: May 21, 2020 - Expires: May 31, 2027 - Mode S code: A5C283 - Registered owner: [Vertol Systems Co Inc](https://openairdocs.org/faa-owner/VERTOL%20SYSTEMS%20CO%20INC) - Location: [Destin, FL](https://openairdocs.org/faa-place/FL/Destin) - Owner type: Corporation - Owner's area on the map: 30.4022° N, 86.4673° W: Placed by OpenAirDocs: center of Destin, FL, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=470QL - Page: https://openairdocs.org/aircraft/N470QL 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. The registry lists only the engine series, so ADs for every Pratt & Whitney Canada PT6T-3 model are included. ## ADs that may apply (OpenAirDocs): 52 in force ### Matched by airframe (Bell 412) - [AD 2026-08-10](https://openairdocs.org/ad/2026-08-10): Passenger compartment equipment · B/E Aerospace Fischer Medical Seat 230/305, EC135P1, EC135T1 and 19 more. Effective May 11, 2026 - [AD 2025-07-01](https://openairdocs.org/ad/2025-07-01): Air Data Computer · Synthetic Vision Electronic Flight Information System (Arrow STC SR09595RC or ST01523WI). Effective May 15, 2025 - [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 2024-16-19](https://openairdocs.org/ad/2024-16-19): Rotorcraft Tail Boom · Bell Textron 212, 412CF, 412 and 1 more. Effective Nov 8, 2024 - [AD 2024-16-01](https://openairdocs.org/ad/2024-16-01): Fuselage structure · Bell Textron 205A, 205A-1, 205B and 4 more. Effective Sep 4, 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 2022-20-14](https://openairdocs.org/ad/2022-20-14): Main Rotor Gearbox · Bell Textron 204B, 205A, 205A-1 and 20 more. Effective Dec 27, 2022 - [AD 2022-22-12](https://openairdocs.org/ad/2022-22-12): Nose/Tail Landing Gear Structure/Axle · Replacement crosstubes P/N D212-664 (Dart Aerospace STC SR01298NY). Effective Nov 22, 2022 - [AD 2022-11-19](https://openairdocs.org/ad/2022-11-19): Aircraft Fuel System, Engine Oil System (Airframe) · Bell Textron 212, 412, 412CF and 1 more. Effective Jul 6, 2022 - [AD 2022-07-02](https://openairdocs.org/ad/2022-07-02): Rotorcraft Tail Boom · Bell Textron 205A, 205A-1, 205B and 5 more. Effective May 9, 2022 - [AD 2022-07-03](https://openairdocs.org/ad/2022-07-03): Flight Control System · Bell Textron 412, 412EP and 412CF. Effective Apr 27, 2022 - [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 2020-22-07](https://openairdocs.org/ad/2020-22-07): Nacelle/Pylon Structure · Bell Textron 412, 412CF and 412EP. Effective Nov 18, 2020 - [AD 2020-16-10](https://openairdocs.org/ad/2020-16-10): Cabin Equipment/Furnishings · Bell Textron 204B, 205A, 205A-1 and 7 more. Effective Sep 3, 2020 - [AD 2020-12-10](https://openairdocs.org/ad/2020-12-10): Tail Rotor Blades · Bell Textron 205A, 205A-1, 205B and 4 more. Effective Jul 16, 2020 - [AD 2020-02-11](https://openairdocs.org/ad/2020-02-11): Inverter · Bell Helicopter Textron 412 and 412EP. Effective Mar 17, 2020 - [AD 2019-09-02](https://openairdocs.org/ad/2019-09-02): 7900 Engine Oil System and 2800 Aircraft Fuel System · Bell Helicopter Textron 212, 412, 412CF and 1 more. Effective Jun 4, 2019 - [AD 2018-16-14](https://openairdocs.org/ad/2018-16-14): Emergency Flotation Section · Bell Helicopter Textron 212, 412 and 412EP. Effective Oct 4, 2018 - [AD 2013-20-18](https://openairdocs.org/ad/2013-20-18): Main Rotor Head · Bell Helicopter Textron 412, 412CF and 412EP. Effective Nov 29, 2013 - [AD 2013-16-16](https://openairdocs.org/ad/2013-16-16): Main Landing Gear Strut/Axle/Truck · Replacement crosstubes P/N D212-664 (Dart Aerospace STC SR01298NY). Effective Sep 17, 2013 - [AD 2013-15-02](https://openairdocs.org/ad/2013-15-02): Tail Rotor Blades · Bell Helicopter Textron 205A, 205A-1, 205B and 5 more. Effective Aug 14, 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 2013-05-14](https://openairdocs.org/ad/2013-05-14): Main Rotor Mast/Swashplate · Bell Helicopter Textron 412 and 412EP. Effective Apr 26, 2013 - [AD 2013-01-04](https://openairdocs.org/ad/2013-01-04): Main Landing Gear · Bell Helicopter Textron 412 and 412EP. Effective Mar 11, 2013 - [AD 2012-22-11](https://openairdocs.org/ad/2012-22-11): Main Rotor · Bell Helicopter Textron 412, 412CF and 412EP. Effective Dec 20, 2012 - [AD 2012-22-06](https://openairdocs.org/ad/2012-22-06): High Landing Gear Forward Crosstube Assembly · Aeronautical Accessories AB412, AB412 EP, 205A and 7 more. Effective Dec 14, 2012 - [AD 2012-11-13](https://openairdocs.org/ad/2012-11-13): High Landing Gear Aft Crosstube Assembly · Aeronautical Accessories AB412, AB412 EP, 412 and 3 more. Effective Jul 30, 2012 - [AD 2011-25-01](https://openairdocs.org/ad/2011-25-01): Liferafts · Agusta AB412, AB412 EP, 206A and 23 more. Effective Jan 17, 2012 - [AD 2010-26-52](https://openairdocs.org/ad/2010-26-52): Tail Rotor Blade · Bell Helicopter Textron 204B, 205A, 205A-1 and 6 more. Effective Nov 15, 2011 - [AD 2010-10-16](https://openairdocs.org/ad/2010-10-16): Crosstube · Agusta AB412, AB412 EP, 205A and 6 more. Effective Jun 8, 2010 - [AD 2007-22-02](https://openairdocs.org/ad/2007-22-02): Tail rotor blade (blade) forward tip weight retention block (tip block) and the aft tip closure (tip closure) · Bell Helicopter Textron 205A, 205A-1, 205B and 4 more. Effective Nov 30, 2007 - [AD 2005-20-38](https://openairdocs.org/ad/2005-20-38): Reservoir assembly adapter (adapter) · Bell Helicopter Textron 212, 412 and 412EP with STC SH2820SO. Effective Oct 28, 2005 - [AD 2001-22-14](https://openairdocs.org/ad/2001-22-14): Fire Extinguishing System Bottle Cartridges · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 105 more. Effective Dec 10, 2001 - [AD 2001-13-01](https://openairdocs.org/ad/2001-13-01): Tail Rotor Counterweight Bellcrank (bellcrank) Retention Nut (retention nut) · Bell Helicopter Textron 205A-1, 205B, 212 and 3 more. Effective Aug 1, 2001 - [AD 2001-09-11](https://openairdocs.org/ad/2001-09-11): Tail Rotor Yoke · Agusta AB412, AB412 EP, 412 and 2 more. Effective Jun 11, 2001 - [AD 2001-08-04](https://openairdocs.org/ad/2001-08-04): Main Rotor Actuator · Bell Helicopter Textron 205A-1, 205B, 212 and 3 more. Effective May 3, 2001 - [AD 99-23-23](https://openairdocs.org/ad/99-23-23): Measure Yolk Inspection · Bell Helicopter Textron 412, 412CF and 412EP. Effective Dec 1, 1999 - [AD 97-11-04](https://openairdocs.org/ad/97-11-04): Mast And Spline Plate · Bell Helicopter Textron 412 and 412EP. Effective Jun 24, 1997 - [AD 97-07-06](https://openairdocs.org/ad/97-07-06): Swashplate Support Assembly · Bell Helicopter Textron 412. Effective May 9, 1997 - [AD 94-18-09](https://openairdocs.org/ad/94-18-09): Main Transmission Lower Planetary Spider · Bell Helicopter Textron 205A, 205A-1, 205B and 2 more. Effective Oct 14, 1994 - [AD 93-17-12](https://openairdocs.org/ad/93-17-12): Main Rotor Transmission Lower Planetary Spider · Bell Helicopter Textron 204B, 205A, 205A-1 and 3 more. Effective Jul 29, 1994 - [AD 93-02-07](https://openairdocs.org/ad/93-02-07): Vertical Fin Spar · Bell Helicopter Textron 412. Effective Mar 22, 1993 - [AD 92-13-10](https://openairdocs.org/ad/92-13-10): Tail Rotor Driveshaft Hanger Bearing · Bell Helicopter Textron 204B, 205A, 205A-1 and 3 more. Effective Feb 23, 1993 - [AD 92-09-05](https://openairdocs.org/ad/92-09-05): Torque Adapter · Bell Helicopter Textron 212 and 412. Effective Jun 2, 1992 - [AD 90-03-09](https://openairdocs.org/ad/90-03-09): T/R Hub Assembly (See 90-03-09) · Bell Helicopter Textron 205A, 205A-1, 212 and 1 more. Effective Feb 13, 1990 - [AD 89-08-05](https://openairdocs.org/ad/89-08-05): Transmission Internal Sump Oil Filter · Bell Helicopter Textron 204B, 205A, 205A-1 and 2 more. Effective Jan 3, 1990 - [AD 85-07-01](https://openairdocs.org/ad/85-07-01): Main Rotor Pitch Horn · Bell Helicopter Textron 412. Effective Apr 10, 1985 - [AD 82-26-51 R1](https://openairdocs.org/ad/82-26-51-R1): Yoke Assemblies Service Time · Bell Helicopter Textron 412. Effective Dec 2, 1983 - [AD 86-16-11 L](https://openairdocs.org/ad/86-16-11-L): Inspect T/R Hub Assembly (See 90-03-09) · Bell Helicopter Textron 412 ### Matched by engine (Pratt & Whitney Canada PT6T-3 series) - [AD 79-11-03](https://openairdocs.org/ad/79-11-03): Automatic Fuel Control · Pratt & Whitney Canada PT6T-3 and PT6T-6. Effective May 31, 1979 - [AD 78-17-05](https://openairdocs.org/ad/78-17-05): Automatic Fuel Control Unit · Pratt & Whitney Canada PT6T-3, PT6T-3A and PT6T-6. Effective Aug 31, 1978 - [AD 76-02-08](https://openairdocs.org/ad/76-02-08): Fuel Pump · Pratt & Whitney Canada PT6T-3, PT6T-3A and PT6T-6. Effective Feb 5, 1976 ### 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 2018-17-01](https://openairdocs.org/ad/2018-17-01) (historical): Engine Oil System and Aircraft Fuel System · Bell Helicopter Textron 212, 412, 412CF and 1 more. Effective Sep 5, 2018 - [AD 2017-15-02](https://openairdocs.org/ad/2017-15-02) (historical): Engine Oil System and Aircraft Fuel System · Bell Helicopter Textron 212 and 412. Effective Aug 4, 2017 - [AD 2015-04-04](https://openairdocs.org/ad/2015-04-04) (historical): AC Inverter · Bell Helicopter Textron 412 and 412EP. Effective Mar 11, 2015 - [AD 2011-12-08](https://openairdocs.org/ad/2011-12-08) (historical): Tail rotor (T/R) blades · Bell Helicopter Textron 205A, 205A-1, 205B and 4 more. Effective Jul 5, 2011 - [AD 2009-05-09](https://openairdocs.org/ad/2009-05-09) (historical): Main rotor yoke · Bell Helicopter Textron 412, 412CF and 412EP. Effective Mar 31, 2009 - [AD 2008-10-03](https://openairdocs.org/ad/2008-10-03) (historical): Tail rotor blade assembly · Bell Helicopter Textron 204B, 205A, 205A-1 and 6 more. Effective May 21, 2008 - [AD 2007-19-53](https://openairdocs.org/ad/2007-19-53) (historical): Tail rotor blade (blade) · Bell Helicopter Textron 204B, 205A, 205A-1 and 6 more. Effective Dec 5, 2007 - [AD 2002-09-04](https://openairdocs.org/ad/2002-09-04) (historical): Tip Block and Tip Closure · Bell Helicopter Textron 205A, 205A-1, 205B and 4 more. Effective Jun 7, 2002 - [AD 2000-25-03](https://openairdocs.org/ad/2000-25-03) (historical): Main Rotor Actuator Locking Washer · Bell Helicopter Textron 205A-1, 205B, 212 and 2 more. Effective Dec 28, 2000 - [AD 2000-18-09](https://openairdocs.org/ad/2000-18-09) (historical): Tailboom Attachment Cap Angle · Bell Helicopter Textron 412, 412CF and 412EP. Effective Sep 28, 2000 - [AD 98-07-03](https://openairdocs.org/ad/98-07-03) (historical): Tail Rotor Yoke Assembly · Agusta AB412 and 412. Effective Apr 8, 1998 ## Information bulletins (advisory) (4 in force) - [SAIB SW-08-42](https://openairdocs.org/saib/SW-08-42): Emergency Float with Liferaft Kits (kits). Issued Aug 27, 2008 - [SAIB SW-07-29](https://openairdocs.org/saib/SW-07-29): High skid gear crosstubes. Issued Apr 18, 2007 - [SAIB SW-05-47](https://openairdocs.org/saib/SW-05-47): . Issued Apr 5, 2005 - [SAIB SW-05-10R1](https://openairdocs.org/saib/SW-05-10R1): . Issued Nov 30, 2004 - [SAIB SW-05-10](https://openairdocs.org/saib/SW-05-10) (historical): . Issued Nov 5, 2004 ## NTSB investigations None matched to N470QL. ## FAA accident and incident reports None matched to N470QL. ## 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) (386, 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 (Bell 412) - [STC SR01928NY](https://openairdocs.org/stc/SR01928NY): Installation of emergency float system. Leonardo Helicopters US Corporation - [STC SR12427IB](https://openairdocs.org/stc/SR12427IB): Installation of an AEM MTP136D Panel Mount FM Transceiver. Anodyne Electronics Manufacturing Corporation - [STC SR02736NY](https://openairdocs.org/stc/SR02736NY): Installation of Utility Basket on the right hand side. Alpine Aerotech Ltd - [STC SR02270SE](https://openairdocs.org/stc/SR02270SE): Fabrication and installation of Geneva Aviation Audio System. AEM USA Inc - [STC SR02444SE](https://openairdocs.org/stc/SR02444SE): Installation of P178 Failsafe Audio Mixer. AEM USA Inc - [STC SR12332SE](https://openairdocs.org/stc/SR12332SE): Installation of Mechanical Specialties, LLC Human External Cargo (HEC) and non-HEC Hook System. Mechanical Specialties, LLC - [STC SH3261SO](https://openairdocs.org/stc/SH3261SO): Installation of replacement skid tubes. Bell Helicopter Textron Inc - [STC SR12148LA](https://openairdocs.org/stc/SR12148LA): Installation of modified configurations of the Bell Helicopter Textron (BHT) Model 412 “Arm and Bearing Assembly”. Extex Engineered Products - [STC SR04465NY](https://openairdocs.org/stc/SR04465NY): Installation of the iPad Mount. Avio Design Group Inc - [STC SR00258DE](https://openairdocs.org/stc/SR00258DE): Installation of an articulating patient loading system. Air Methods LLC - [STC SR09922AC](https://openairdocs.org/stc/SR09922AC): Installation of a Foresight MX Condition Monitoring System. GPMS International Inc - [STC SR12068IB](https://openairdocs.org/stc/SR12068IB): Installation of the AFI4700 Electronic Flight Instrument. Alpine Aerotech LP - [STC SR12072IB](https://openairdocs.org/stc/SR12072IB): Manufacturing and Installation of Cargo Hold Nets; Maintenance must be in accordance with ICARUS Aero Inc. Instructions for Continued Airworthiness as shown on the attached FAA AML No. SR12072IB. Icarus Aero Inc - [STC SH8610SW](https://openairdocs.org/stc/SH8610SW): Fabrication of Isolair Eliminator II Model 4600-212/412 Fire Fighting System. Isolair Inc - [STC SR02590AK](https://openairdocs.org/stc/SR02590AK): Installation of Bell Lightweight Tailboom Modification. StandardAero Atlantic USA Inc - [STC SR00032DE-D](https://openairdocs.org/stc/SR00032DE-D): Installation of an Air Methods Corporation Emergency Medical System Interior that provides (3) three patient locations to be configured one of two ways using an Intensive Care Transport Litter (ICTL) and Ferno stretchers. Air Methods LLC - [STC SR00107DE-D](https://openairdocs.org/stc/SR00107DE-D): Installation of an Air Methods, LLC, Emergency Medical System interior. Air Methods LLC - [STC SR00113DE-D](https://openairdocs.org/stc/SR00113DE-D): lnstallation of an Air Methods, LLC, Emergency Medical System interior. Air Methods LLC - [STC SR00118DE-D](https://openairdocs.org/stc/SR00118DE-D): Installation of a standby attitude indicator battery annunciator system. Air Methods LLC - [STC SR00855DE](https://openairdocs.org/stc/SR00855DE): Installation of Tracking Patient Loading System. Air Methods LLC - [STC SR04132CH](https://openairdocs.org/stc/SR04132CH): Installation of Heli-Preheat Kit, p/n TA3132-1 for 115 volt application in accordance with Heli-Preheat Kit drawing TA3132-1 Revision G, dated December 11, 2023 or later FAA approved revisions and Preheat Kit Installation Instruction TNH3132 Revision C, dated November 7, 2023 or later FAA approved revisions. HARTZELL PROPELLER LLC - [STC SR01779LA](https://openairdocs.org/stc/SR01779LA): Installation of the Emergency Float Kits. Dart Aerospace ULC - [STC SH1415SO](https://openairdocs.org/stc/SH1415SO): Installation of Wire Strike Protection system; Configuration #1 - Installation P/N 364-83300-5 (Standard Skid Gear) or P/N 364-83300-7 (High Skid Gear). Magellan Aerospace - [STC SH3894SW](https://openairdocs.org/stc/SH3894SW): Installation of 9-place forward facing airline seats. Bell Textron Inc - [STC SR09343RC](https://openairdocs.org/stc/SR09343RC): Installation of Aero Seats and Systems, Inc., Life Raft Deployment System (LRDS). Bell Textron Inc - [STC SR00145IB](https://openairdocs.org/stc/SR00145IB): Installation of LH and RH Vertical Reference Door(s). Transwest Helicopters Ltd - [STC SR00142IB](https://openairdocs.org/stc/SR00142IB): Installation of the Integrated Health and Usage Monitoring System (HUMS). RMCI Canada Inc - [STC SR00141IB](https://openairdocs.org/stc/SR00141IB): Installation of the Aft Pedestal Stowage Compartment. Alpine Aerotech LP - [STC SH4056NM](https://openairdocs.org/stc/SH4056NM): Installation of pneumatic door actuators. Dart Aerospace USA Inc - [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 SR00871LA](https://openairdocs.org/stc/SR00871LA): Installation of the Modular Seating System. LifePort LLC - [STC SR00080IB](https://openairdocs.org/stc/SR00080IB): Installation of the Garmin GRA 55 Radar Altimeter. Alpine Aerotech LP - [STC SR03832NY](https://openairdocs.org/stc/SR03832NY): Installation of Full Vertical Reference Door P/N D412-761 for Left Hand Vertical Reference Operations. Dart Aerospace Limited - [STC SH1543GL](https://openairdocs.org/stc/SH1543GL): Remove skid landing gear replacing same with a fixed (non-retracting), wheeled, tricycle landing gear. Kaman Corporation Aircraft Wheel and Brake LLC - [STC SH1651GL](https://openairdocs.org/stc/SH1651GL): Remove skid landing gear replacing same with a fixed (non-retracting), wheeled, tricycle landing gear. Kaman Corporation Aircraft Wheel and Brake LLC - [STC SR00058IB](https://openairdocs.org/stc/SR00058IB): Installation of J301A Audio Controller. Alpine Aerotech LP - [STC SR00047IB](https://openairdocs.org/stc/SR00047IB): Installation of VIH Aerospace (VIHA) Pulse Light. VIH Aerospace Inc - [STC SR02590SE](https://openairdocs.org/stc/SR02590SE): Installation of a Light Emitting Diode (LED) Annunciator Panel. Luma Technologies LLC - [STC SR00035IB](https://openairdocs.org/stc/SR00035IB): Installation of the Garmin GTS 8xx Traffic System. Alpine Aerotech LP - [STC SH7860SW](https://openairdocs.org/stc/SH7860SW): Installation of a Lucas or Breeze externally mounted rescue hoist. AEM USA Inc - [STC SR04615NY](https://openairdocs.org/stc/SR04615NY): Installation of the Human External Cargo (HEC) Suspension Line Kit. Boost Human External Cargo Systems Inc - [STC SR04616NY](https://openairdocs.org/stc/SR04616NY): Installation of the Dual HEC Hook System Provisions is to be performed. Boost Human External Cargo Systems Inc - [STC SR00713SE](https://openairdocs.org/stc/SR00713SE): Installation of Onboard Systems International Cargo Hook Kit. Onboard Systems International - [STC SR01634SE](https://openairdocs.org/stc/SR01634SE): Installation of a Supplemental Lighting System. Aviation Specialties Unlimited Inc - [STC SR01459LA](https://openairdocs.org/stc/SR01459LA): Installation of Apical Industries, Inc Emergency Mid-Float with 10-man Life Raft kits. Dart Aerospace ULC - [STC SR04663NY](https://openairdocs.org/stc/SR04663NY): Installation of the Center Pedestal Riser. Alpine Aerotech LP - [STC SH5707NM](https://openairdocs.org/stc/SH5707NM): Fabrication of Onboard Systems Model 200-088-03 or 200-088-04 (without Load Weight) or 200-089-03, -04, -05 or -06 (with Load Weight) cargo hook suspension systems. Onboard Systems International - [STC SH5737NM](https://openairdocs.org/stc/SH5737NM): Replacement of Bell magnesium cargo hook bumper and ring Part Nos. 204-072-901-1 or -3, and 204-072-905-3, respectively, with Onboard bumper ring kit No. 210-092-00. Fabrication of Onboard Systems Model 210-092-00 bumper ring kit. Onboard Systems International - [STC SH5758NM](https://openairdocs.org/stc/SH5758NM): Fabrication of the Onboard Model 200-095-00 Multi-Channel Electrical Slip-Ring Kit. Onboard Systems International - [STC SR00277SE](https://openairdocs.org/stc/SR00277SE): Fabrication of Onboard Systems Model 528-002-00 or 528-002-01 cargo hook. Onboard Systems International LLC All 386: https://openairdocs.org/aircraft/N470QL/stcs.md ## Related - Other Bell 412 aircraft: https://openairdocs.org/model/bell-412/aircraft.md - The Pratt & Whitney Canada PT6T-3 series engine: https://openairdocs.org/engine/pratt-whitney-canada-pt6t-3-series.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.