# N397AL: 1990 Bell 412

- Status: Valid registration
- Airframe: [Bell 412](https://openairdocs.org/model/bell-412) (registry code 1182202, 15 seats)
- Engine: [Pratt & Whitney PT6 series](https://openairdocs.org/engine/pratt-whitney-pt6-series) (registry code 52033)
- Data sheets: [TCDS H4SW](https://openairdocs.org/tcds/H4SW) (Bell Textron Inc.) (OpenAirDocs)
- Serial number: 36012
- Year built: 1990
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard, transport
- Airworthiness date: May 23, 2006
- Certificate issued: June 15, 2026
- Expires: June 30, 2033
- Mode S code: A49CD5
- Registered owner: [Vertol Systems Co LLC](https://openairdocs.org/faa-owner/VERTOL%20SYSTEMS%20CO%20LLC)
- Location: [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington)
- Owner type: LLC
- Owner's area on the map: 39.7236° N, 75.5412° W: Placed by OpenAirDocs at the center of ZIP code 19801, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=397AL
- Page: https://openairdocs.org/aircraft/N397AL

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 PT6 model are included.

## ADs that may apply (OpenAirDocs): 84 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 PT6 series)

- [AD 2024-04-51](https://openairdocs.org/ad/2024-04-51): Turbine Section · Pratt & Whitney Canada PT6A-64, PT6A-66, PT6A-66A and 17 more. Effective Mar 28, 2024
- [AD 2023-03-02](https://openairdocs.org/ad/2023-03-02): Turbine Engine Compressor Section · Pratt & Whitney Canada PT6E-67XP. Effective Mar 21, 2023
- [AD 2022-08-13](https://openairdocs.org/ad/2022-08-13): Turbine Section · Pratt & Whitney Canada PT6A-34, PT6A-34B, PT6A-34AG and 2 more. Effective May 27, 2022
- [AD 2020-18-05](https://openairdocs.org/ad/2020-18-05): Fuel Control/Turbine Engines · Pratt & Whitney Canada PT6B-37A. Effective Oct 7, 2020
- [AD 2019-22-03](https://openairdocs.org/ad/2019-22-03): Turbine Engine Reduction Gear · Pratt & Whitney Canada PT6B-37A. Effective Dec 24, 2019
- [AD 2016-05-13](https://openairdocs.org/ad/2016-05-13): Corrosion and perforation of the two-ply Cu-Be bellows in Woodward FCUs. · Pratt & Whitney Canada PT6A-60AG, PT6A-65AG, PT6A-67AF and 1 more. Effective Apr 22, 2016
- [AD 2014-17-08 R1](https://openairdocs.org/ad/2014-17-08-R1): Compressor turbine (CT) blades · Pratt & Whitney Canada PT6A-114 and PT6A-114A. Effective Jun 5, 2015
- [AD 2014-11-05](https://openairdocs.org/ad/2014-11-05): Reinforcement liner to the power turbine (PT) containment   
  ring and, for certain PT containment rings, adding scallops · Pratt & Whitney Canada PT6A-11, PT6A-110, PT6A-112 and 18 more. Effective Aug 5, 2014
- [AD 2013-03-14](https://openairdocs.org/ad/2013-03-14): Power turbine (PT) baffle · Pratt & Whitney Canada PT6C-67C. Effective Mar 26, 2013
- [AD 2012-09-10](https://openairdocs.org/ad/2012-09-10): First stage sun gears · Pratt & Whitney Canada PT6A-110, PT6A-112, PT6A-114 and 12 more. Effective May 23, 2012
- [AD 2011-25-12](https://openairdocs.org/ad/2011-25-12): Sun gear · Pratt & Whitney Canada PT6A-15AG, PT6A-27, PT6A-28 and 4 more. Effective Dec 28, 2011
- [AD 2011-20-51](https://openairdocs.org/ad/2011-20-51): Gears · Pratt & Whitney Canada PT6A-15AG, PT6A-27, PT6A-28 and 4 more. Effective Nov 1, 2011
- [AD 2004-25-18](https://openairdocs.org/ad/2004-25-18): Propeller governor assemblies · Pratt & Whitney Canada PT6A-60A and PT6A-65B. Effective Jan 18, 2005
- [AD 2004-20-04](https://openairdocs.org/ad/2004-20-04): Compressor rear hubs · Pratt & Whitney Canada PT6B-36A and PT6B-36B. Effective Oct 18, 2004
- [AD 2002-23-13](https://openairdocs.org/ad/2002-23-13): Turbine Exhaust Ducts · Pratt & Whitney Canada PT6A-11, PT6A-110, PT6A-112 and 20 more. Effective Dec 31, 2002
- [AD 2001-20-01](https://openairdocs.org/ad/2001-20-01): Compressor Bleed Valve Assembly · Pratt & Whitney Canada PT6A-114A and PT6A-25C. Effective Nov 5, 2001
- [AD 97-04-12](https://openairdocs.org/ad/97-04-12): Compressor Bleed-off Valve · Pratt & Whitney Canada PT6A-11, PT6A-110, PT6A-112 and 52 more. Effective Mar 14, 1997
- [AD 95-13-08](https://openairdocs.org/ad/95-13-08): Compressor Turbine Disk · Pratt & Whitney Canada PT6A-67D. Effective Jul 12, 1995
- [AD 93-23-06](https://openairdocs.org/ad/93-23-06): Airframe Chip Detector Flag System · Pratt & Whitney Canada PT6A-50. Effective Jan 26, 1994
- [AD 92-15-11](https://openairdocs.org/ad/92-15-11): Compressor Delivery Air Line (P3) Filter Assembly · Pratt & Whitney Canada PT6A-20, PT6A-20A, PT6A-21 and 7 more. Effective Aug 17, 1992
- [AD 90-12-05](https://openairdocs.org/ad/90-12-05): Engine Overhaul · Pratt & Whitney Canada PT6A-15AG, PT6A-27, PT6A-28 and 3 more. Effective May 30, 1990
- [AD 88-03-01](https://openairdocs.org/ad/88-03-01): Compressor Stator Assembly · Pratt & Whitney Canada PT6B-36A. Effective Nov 29, 1988
- [AD 86-10-05](https://openairdocs.org/ad/86-10-05): First Stage Compressor Hub · Pratt & Whitney Canada PT6A-42. Effective Jun 5, 1986
- [AD 80-08-12](https://openairdocs.org/ad/80-08-12): Fuel Pump Drive Coupling Splines · Pratt & Whitney Canada PT6A-11, PT6A-112, PT6A-135 and 24 more. Effective Apr 18, 1980
- [AD 80-04-02](https://openairdocs.org/ad/80-04-02): Push-Pull Control Terminal · Pratt & Whitney Canada PT6A-20, PT6A-6A, PT6A-6B and 1 more. Effective Feb 8, 1980
- [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 78-17-07](https://openairdocs.org/ad/78-17-07): Fuel Control Unit · Pratt & Whitney Canada PT6A-38, PT6A-41 and PT6A-45A. Effective Aug 31, 1978
- [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 78-12-04](https://openairdocs.org/ad/78-12-04): No. 2 Bearing Pressure Oil Transfer Tube Assembly · Pratt & Whitney Canada PT6A-38, PT6A-41 and PT6A-45A. Effective Jun 19, 1978
- [AD 75-06-01](https://openairdocs.org/ad/75-06-01): Gearbox Deterioration · Pratt & Whitney Canada PT6A-20, PT6A-20A, PT6A-20B and 11 more. Effective Apr 1, 1977
- [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
- [AD 75-11-04](https://openairdocs.org/ad/75-11-04): Reduction Gearbox Engine Distress · Pratt & Whitney Canada PT6A-20, PT6A-20A, PT6A-20B and 8 more. Effective May 20, 1975
- [AD 70-16-01](https://openairdocs.org/ad/70-16-01): Turbo Propeller Governors · Pratt & Whitney Canada PT6A-11, PT6A-11AG, PT6A-15AG and 5 more. Effective Aug 4, 1970
- [AD 69-23-06](https://openairdocs.org/ad/69-23-06): Fuel Pumps · Pratt & Whitney Canada PT6A-20, PT6A-27, PT6A-28 and 4 more. Effective Nov 15, 1969
- [AD 68-05-03](https://openairdocs.org/ad/68-05-03): Reverse Mode · Pratt & Whitney Canada PT6A-20 and PT6A-6B. Effective Feb 28, 1968

### 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
- [AD 2015-20-04](https://openairdocs.org/ad/2015-20-04) (historical): Reduction gearbox (RGB) assembly · Pratt & Whitney Canada PT6B-37A. Effective Nov 18, 2015
- [AD 2014-17-08](https://openairdocs.org/ad/2014-17-08) (historical): Compressor turbine (CT) blades · Pratt & Whitney Canada PT6A-114 and PT6A-114A. Effective Oct 8, 2014
- [AD 88-24-02](https://openairdocs.org/ad/88-24-02) (historical): Airframe Chip Detector Flag System · Pratt & Whitney Canada PT6A-50

## Information bulletins (advisory) (9 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 NE-15-21](https://openairdocs.org/saib/NE-15-21): Fuel Injector Nozzle. Issued Aug 19, 2015
- [SAIB NE-12-04](https://openairdocs.org/saib/NE-12-04): Turbine/ Turboprop Engine: Reduction Gearbox. Issued Nov 1, 2011
- [SAIB NE-10-47](https://openairdocs.org/saib/NE-10-47): Turbine Engine Compressor Section. Issued Aug 30, 2010
- [SAIB NE-06-34](https://openairdocs.org/saib/NE-06-34): . Issued Mar 21, 2006
- [SAIB CE-03-24](https://openairdocs.org/saib/CE-03-24): . Issued Feb 19, 2003
- [SAIB SW-05-10](https://openairdocs.org/saib/SW-05-10) (historical): . Issued Nov 5, 2004

## NTSB investigations

None matched to N397AL.

## FAA accident and incident reports

None matched to N397AL.

## Service difficulty reports (13)

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 EOPA20121022397](https://openairdocs.org/sdr/EOPA20121022397), Oct 18, 2012: HOUSING. CRACKED. ON INSPECTION, AN OIL LEAK WAS DISCOVERED IN THE COMBINED GEARBOX AREA. ON FURTHER INSPECTION THE NR 1 ENGINE CHIP DETECTOR HSG ATTACHED TO THE GEARBOX WAS FOUN
- [SDR EOPA020211397AL](https://openairdocs.org/sdr/EOPA020211397AL), Feb 2, 2011: FRAME. CRACKED. FRAME WAS FOUND CRACKED AT APPROX STA 78 IN TAILBOOM ABOVE BAGGAGE COMPARTMENT.
- [SDR 2011F00024](https://openairdocs.org/sdr/2011F00024), Jan 28, 2011: BLADE. DELAMINATED. M/R BLADE T/E "WEDGE" CAME DEBONDED. REMOVED REMAINING PORTION OF WEDGE AND TOUCHED UP PAINT IAW MFG PRODUCT SUPPORT ENGINEERING.
- [SDR EOPA012811397AL](https://openairdocs.org/sdr/EOPA012811397AL), Jan 28, 2011: BULKHEAD. CRACKED. FOUND .5 IN CRACK IN BULKHEAD ASSY LOCATED AT APPROX STA 185 IN TAILBOOM. CRACK WAS IN THE CTR RT PORTION OF THE FRAME.
- [SDR ALGA2010F00206](https://openairdocs.org/sdr/ALGA2010F00206), Sep 3, 2010: CONTROL CABLE. BINDING. ON APPROCH, THE COLLECTIVE STUCK AT APPROX 50 PERCENT TORQUE. PILOT WAS ABLE TO FORCE COLLECTIVE TO BREAK IT FREE. PROBLEM WAS CAUSED BT A N2 CONTROL CABLE SEIZ
- [SDR 98ZZZX3601](https://openairdocs.org/sdr/98ZZZX3601), Aug 13, 1998: CROSSTUBE. CORRODED. DURING 12-MONTH INSPECTION, FOUND CORROSION PITTING IN CROSS TUBE BEYOND LIMITS.
- [SDR 95ZZZX4098](https://openairdocs.org/sdr/95ZZZX4098), Jul 6, 1995: FIREWALL. CORRODED. DURING REPLACEMENT OF ENGINE DECK/WORK DECK, FOUND SEAL RETAINERS CORRODED. ALUMINUM RETAINERS RIVETED TO STAINLESS STEEL PARTS.
- [SDR 95ZZZX4097](https://openairdocs.org/sdr/95ZZZX4097), Jul 6, 1995: FIREWALL. CORRODED. DURING REPLACEMENT OF WORK DECK/ENGINE DECK, FOUND SEAL RETAINERS CORRODED. ALUMINUM RETAINERS ON STAINLESS STEEL PARTS.
- [SDR 95ZZZX4096](https://openairdocs.org/sdr/95ZZZX4096), Jul 6, 1995: FIREWALL. CORRODED. DURING REPLACEMENT OF ENGINE SERVICE DECK, FOUND THE STRAPS ON UPPER FIREWALL WHERE THE AIR MANAGEMENT SYSTEM BOLTS ON, HAD SEVERE CORROSION. CAUSED BY ALUMINUM
- [SDR 95ZZZX4095](https://openairdocs.org/sdr/95ZZZX4095), Jul 6, 1995: WORK DECK. SEPARATION. DAILY INSPECTION FOUND WORK DECK PANELS TOP SKIN SEPARATED OVER A LARGE AREA. ALSO, UNDERSIDE OF PANEL IS SWELLED. SUSPECT CAUSED BY PROLONGED EXPOSURE TO HIGH 
- [SDR 95ZZZX2792](https://openairdocs.org/sdr/95ZZZX2792), May 10, 1995: RACE. WORN. ON DISASSEMBLY FOR REPAIR, FOUND BEARING RACE WORN BEYOND LIMITS. BEARING PN 412010216105, SN RE299. ARM PN 412010263101.
- [SDR 95ZZZX2791](https://openairdocs.org/sdr/95ZZZX2791), May 10, 1995: BEARING RACE. WORN. ON DISASSEMBLY FOR REPAIR, FOUND BEARING RACE WORN BEYOND LIMITS. BEARING PN 412010216105, SN RE493. ARM PN 412010263101.
- [SDR 95ZZZX1851](https://openairdocs.org/sdr/95ZZZX1851), Mar 27, 1995: BOOST PUMP. FAILED. DURING CRUISE FLIGHT NR 2, ENGINE FUEL BOOST PUMP PRESSURE FLUCTUATED AND THEN PRESSURE WENT TO ZERO. REPLACED BOOST PUMP. CAUSE UNKNOWN.

## STCs that may be installed (OpenAirDocs) (441, 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 441: https://openairdocs.org/aircraft/N397AL/stcs.md

## Related

- Other Bell 412 aircraft: https://openairdocs.org/model/bell-412/aircraft.md
- The Pratt & Whitney PT6 series engine: https://openairdocs.org/engine/pratt-whitney-pt6-series.md

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