Bell 412

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Utility transport helicopter family by Bell

title: "Bell 412" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["bell-aircraft", "1980s-united-states-helicopters", "1980s-united-states-civil-utility-aircraft", "1980s-canadian-helicopters", "twin-turbine-helicopters", "aircraft-first-flown-in-1979", "single-rotor-helicopters", "1980s-canadian-civil-utility-aircraft", "aircraft-with-skid-landing-gear"] description: "Utility transport helicopter family by Bell" topic_path: "geography/united-states" source: "https://en.wikipedia.org/wiki/Bell_412" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Utility transport helicopter family by Bell ::

::data[format=table title="Infobox aircraft"]

FieldValue
nameBell 412
image(1)Police Helicopter 039.jpg
captionBell 412EP of the NSW Police Sydney
typeMultipurpose utility helicopter
national_originUnited States/Canada
manufacturerBell Helicopter
first_flight
introduction
primary_userJapan Ground Self Defence Force
more_usersSee Operators for others
produced1979–present
number_built1,300+
developed_fromBell 212
variantsBell CH-146 Griffon
::

| name = Bell 412 | image = (1)Police Helicopter 039.jpg | caption = Bell 412EP of the NSW Police Sydney | type = Multipurpose utility helicopter | national_origin = United States/Canada | manufacturer = Bell Helicopter | designer = | first_flight = | introduction = | retired = | status = | primary_user = Japan Ground Self Defence Force | more_users = See Operators for others | produced = 1979–present | number_built = 1,300+ | developed_from = Bell 212 | variants = Bell CH-146 Griffon

The Bell 412 is a utility helicopter of the Huey family manufactured by Bell Helicopter. It is a development of the Bell 212, with the major difference being the composite four-blade main rotor. It is a twin-turbine helicopter that has been popular on the civilian and military markets, and major users include Canada, Italy, and Japan. Several hundred have been produced since its introduction in 1979, and several iterations of upgrades and variations have been produced, such as with upgraded cockpit electronics.

It has been manufactured under license by Agusta in Italy as the Agusta-Bell AB412, in Indonesia by Indonesian Aerospace, and in Japan by Fuji Heavy Industries. The CH-146 Griffon, a Bell 412 variant for the Canadian Armed Forces, is manufactured in Bell-Textron's main commercial factory in Mirabel, Quebec.

Design and development

::figure[src="https://upload.wikimedia.org/wikipedia/commons/3/37/RCAF_Bell_CH-146_5D3_4156_(43790685721).jpg" caption="Bell 412CF looking forward from the tail"] ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/d/d4/Griffin_Helicopter_Practices_Approach_to_RAF_Shawbury_MOD_45151083.jpg" caption="Bell 412 on approach"] ::

Development began in the late 1970s, with two Bell 212s being converted into 412 prototypes. An advanced four-blade main rotor with a smaller diameter replaced the 212's two-blade rotor. A Bell 412 prototype first flew in August 1979. The initial model was certified in January 1981, with deliveries commencing in the same month. The 412 model was followed by the 412SP (Special Performance) version, which featured a larger fuel capacity, a higher takeoff weight, and optional seating arrangements. In 1991, the 412HP (High Performance) variant with improved transmission replaced the SP version in production. ::figure[src="https://upload.wikimedia.org/wikipedia/commons/1/1f/H-51_bell_412_helicopter_(chile_air_force).jpg" caption="A Chilean Air Force Bell 412"] ::

In the early 2000s, Bell offered the Bell 412EP as its Bell 412 LUH entrant in the U.S. Army Light Utility Helicopter program, where it competed against several other light helicopters for an order.

The current production version, 412EP (Enhanced Performance), is equipped with a dual digital automatic flight control system. In 2013, Bell introduced the 412EPI, which includes an electronic (digital) engine control upgrade for the PT6T-9 engine, and a glass cockpit display system similar to the one installed on the Bell 429. Also featured is a Garmin touchscreen navigation system, plus the BLR Strake and Fast Fin upgrades for improved hover performance.

The helicopter is powered by the Pratt and Whitney Canada twin-pack power plant with two turboshaft engines and has achieved the lowest in-flight shut-down rate of aircraft turboshaft engines. If one engine is shut down, a single engine can produce emergency power for 30 minutes.

The aircraft has been produced in Montreal, Canada, in Italy under license by Agusta, in Indonesia by Indonesian Aerospace, and also in Japan by Subaru (Fuji Heavy Industries). The Bell 412 was also initially manufactured in Texas, USA.

The emergency medical configuration can carry 6 patients/wounded and two attendants, or two stretchers and up to four attendants.

By 2022, over 1,300 Bell 412 helicopters had been delivered.

Variants

::figure[src="https://upload.wikimedia.org/wikipedia/commons/3/33/Bell_412HP,_Heli_Austria_AN2029793.jpg" caption="Bell 412HP of Heli Austria"] ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/2/2f/Bell_412EP_Griffin_HT1_02_(14704891381).jpg" caption="RAF Griffin HT1"] ::

;Bell 412 :Standard Model with P&WC PT6T-3B ;Bell 412SP: Special Performance version with P&WC PT6T-3BF engines ;Bell 412HP :High performance version with P&WC PT6T-3BG or -3D engines ;Bell 412CF (CH-146 Griffon) :100 custom-built utility transport helicopters for the Canadian Forces, based on 412EP and designated by Bell as 412CF ;Bell 412EP: Enhanced performance version with P&WC PT6T-3DF engines ;Bell 412EPI :Glass cockpit version with P&WC PT6T-9 electronic controlled engines ;Bell Griffin HT1 :Advanced training helicopter based on the Bell 412EP, operated by the Royal Air Force (RAF) between 1997 and 2018 as an advanced flying trainer. Operated by the Defence Helicopter Flying School at RAF Shawbury and the Search and Rescue Training Unit at RAF Valley. ;Bell Griffin HAR2 :Search and Rescue helicopter based on the Bell 412EP, operated by No. 84 Squadron RAF between 2003 and 2023 at RAF Akrotiri in Cyprus. ;Agusta-Bell AB 412 :Civil utility transport version, built under license in Italy by Agusta. ;Agusta-Bell AB 412EP :Italian-built version of the Bell 412EP. ;Agusta-Bell AB 412 Grifone :Military utility transport version, built under licence in Italy by Agusta. ::figure[src="https://upload.wikimedia.org/wikipedia/commons/9/9d/Prototype_of_the_UH-X_ahead_of_her_first_flight.png" caption="UH-X prototype"] ::

;Agusta-Bell AB 412 CRESO :Italian-built version, fitted with a ground surveillance radar. ;Bell 412 LUH :Entry for the U.S. Army Light Utility Helicopter (LUH) program. Lost to the EC145 entry (see UH-72 Lakota) ;IPTN / Indonesian Aerospace NBell 412 :Indonesian Aerospace's (formerly IPTN) licensed product of Bell 412. ;Indonesian Aerospace Gandiwa :Proposed tandem-seat attack helicopter design based on NBell 412 developed by Indonesian Aerospace and Indonesian Army Research and Development Service in 2012–2014. Development was discontinued due to poor potential sales. ;Subaru-Bell UH-2 (Formerly known as UH-X) :Modified version of the Bell 412 EPI; 150 on order to meet the JGSDF's requirement for a UH-1J replacement. ;Subaru-Bell 412EPX :Commercial version of UH-X. ;H.1B :() Royal Thai Armed Forces designation for the Bell 412. ;H.1C :() Royal Thai Armed Forces designation for the Bell 412(HP)SP. ;H.1E :() Royal Thai Armed Forces designation for the Bell 412EP. ;H.LL.2 :() Royal Thai Navy designation for the Bell 412.

Operators

The Bell 412 is used by private and commercial operators. It is particularly popular in the oil industries, military, law enforcement, and for medevac use. Around 2022-23, the unit cost for a 412EPX model was between US$14.5 million and US$16 million.

Military operators

::figure[src="https://upload.wikimedia.org/wikipedia/commons/d/dc/Bell_412_Chilean_Air_Force_(FACh).JPG" caption="Chilean Air Force Bell 412"] ::

;Algeria: Algerian Air Force ;Argentina: Argentine Air Force ;Australia: Australian Army : 2 under lease at Army Aviation Training Center. ;Azerbaijan: Azerbaijani Air Force ;Bahrain: Bahraini Air Force ;Botswana: Botswana Defence Force ;Cameroon: Cameroon Air Force ::figure[src="https://upload.wikimedia.org/wikipedia/commons/4/4a/CH-146_Griffon_Helicopter.jpg" caption="Canadian CH-146 Griffon"] ::

;Canada: Royal Canadian Air Force :3 Canadian Forces Flying Training School (3e École de pilotage des Forces canadiennes) : ;Chile: Chilean Air Force ;Colombia: Colombian Navy ;Cyprus: Cypriot National Guard ;El Salvador: Salvadoran Air Force ;Eritrea: Eritrean Air Force ::figure[src="https://upload.wikimedia.org/wikipedia/commons/b/ba/Agusta-Bell_AB-412_Griffon,Italy-Army(canted).jpg" caption="Agusta-Bell AB-412 of the Italian Army"] ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/1/1e/Agusta-Bell_AB-412_Griffon,Italy-_Army_JP6943483.jpg" caption="AB-412 cockpit"] ::

;Ghana: Ghana Air Force ;Guatemala: Guatemalan Air Force ;Guyana: Guyana Defence Force ;Honduras: Honduran Air Force ;Indonesia: Indonesian Army :Indonesian Navy ;Italy: Italian Army ;Iraq: 412M on order. ;Jamaica: Jamaica Defence Force ::figure[src="https://upload.wikimedia.org/wikipedia/commons/5/58/JGSDF_UH-2_(45152)_right_front_view_at_Camp_Akeno_November_4,_2023_01.jpg" caption="JGSDF UH-2 in November 2023 at Camp Akeno, Japan"] ::

;Japan: Japan Ground Self Defence Force ;Lesotho: Lesotho Defence Force ::figure[src="https://upload.wikimedia.org/wikipedia/commons/6/69/Bell_412EP,Mexico-_Air_Force_AN2158278.jpg" caption="Mexican Air Force Bell 412EP, 2012"] ::

;Mexico: Mexican Air Force ;Montenegro: Montenegrin Air Force ;Morocco: Moroccan Navy ;Nigeria: Nigerian Air Force ;Norway: Royal Norwegian Air Force ;Pakistan: Pakistan Air Force :Pakistan Army ::figure[src="https://upload.wikimedia.org/wikipedia/commons/f/fd/Slovenian_Air_Force_Bell_412_(cropped).jpg" caption="A Slovenian Air Force Bell 412"] ::

;Panama: National Aeronaval Service of Panama ;Peru: Peruvian Air Force :Peruvian Navy ;Philippines: Philippine Air Force: Philippine Army ;Saudi Arabia: Royal Saudi Air Force ;Slovenia: Slovenian Air Force ;Somalia: Somali Air Force ::figure[src="https://upload.wikimedia.org/wikipedia/commons/4/4b/2012년_6월_공군_6전대_헬기(1)_(7982282593).jpg" caption="Two Bell 412 of the Republic of Korea Air Force"] ::

;South Korea: South Korean Air Force ;Sri Lanka: Sri Lanka Air Force ;Tanzania: Tanzania People's Defense Force ::figure[src="https://upload.wikimedia.org/wikipedia/commons/c/c8/Bell_412_of_the_Royal_Thai_Air_Force_in_2013.jpg" caption="A 412 of the Royal Thai Air Force"] ::

;Thailand: Royal Thai Air Force ;Tunisia: Tunisian Air Force ;Turkey: Turkish Coast Guard ;United Arab Emirates: United Arab Emirates Air Force ;Uruguay: Uruguayan Navy ;Venezuela: Venezuelan Army :Venezuelan Navy ;: Zambian Air Force ;Zimbabwe: Air Force of Zimbabwe

Government operators

::figure[src="https://upload.wikimedia.org/wikipedia/commons/0/0a/NSW_RFS_(VH-VJD)Bell_412EP_at_Wagga_Wagga_Airport(4).jpg" caption="Rural Fire Service"] ::

;Australia: Department of Fire and Emergency Services :Emergency Management Queensland :New South Wales Police Force :New South Wales Rural Fire Service :SAAS MedSTAR Retrieval Service ;Brazil: Federal Police ;Canada: Canadian Coast Guard :National Research Council :Surete du Quebec ;Colombia: National Police of Colombia ;Croatia: Croatian Ministry of Interior ::figure[src="https://upload.wikimedia.org/wikipedia/commons/3/32/Bell412_OH_HVD.jpg" caption="A [[Finnish Border Guard]] Agusta Bell AB-412"] ::

;Czech Republic: Police of the Czech Republic ;Finland: Finnish Border Guard ;India: Government of Uttar Pradesh: Operates two Bell 412EP. ;Indonesia: Indonesian National Police ;Iran: Iranian Red Crescent Society ::figure[src="https://upload.wikimedia.org/wikipedia/commons/6/6e/Agusta-Bell_AB-412HP,Italy-Guardia_di_Finanza(framed).jpg" caption="An Italian [[Guardia di Finanza]] Agusta Bell AB-412"] ::

;Italy: Guardia di Finanza :State Forestry Corps ;Japan: Japan Coast Guard :Tokyo Metropolitan Police ::figure[src="https://upload.wikimedia.org/wikipedia/commons/1/1a/952_Bell_412_Korean_National_Police_(7595903284).jpg" caption="South Korean National Police Bell 412"] ::

;South Korea: Coast Guard ;United States: Chicago Fire Department :Delaware State Police :Los Angeles Police Department :Los Angeles County Fire Department :Miami-Dade County Fire Department : New York Police Department :Orange County Fire Authority :San Diego Fire Department :United States Park Police :Ventura County Fire Department :Virginia State Police :Kern County Fire Department

Former

::figure[src="https://upload.wikimedia.org/wikipedia/commons/d/d7/LACoFD_Air_18.jpg" caption="LA County Fire Dept.]] 412 sits atop a helipad in the mountains in the [[Angeles National Forest]]."] ::

;Netherlands: Royal Netherlands Air Force. AB412 helicopters retired from SAR duties in 2015. ;Poland: Polish Air Force, 1 412HP used 1993–2011 ;Slovenia: Slovenian National Police ;United States: Los Angeles Fire Department ;Uganda: Uganda Air Force ;United Kingdom: Royal Air Force

Incidents and accidents

  • On April 4, 1991, a Bell 412SP collided in mid-air with a Piper Aerostar over Lower Merion Township, Pennsylvania, during an improvised attempt to inspect the Aerostar's landing gear. The accident killed all five people on both aircraft, including Aerostar passenger and United States senator John Heinz, along with two children on the ground. The collision was attributed to poor judgment by the pilots of both aircraft.
  • On December 10, 2006, Bell 412SP medical helicopter Mercy Air 2 crashed in mountainous terrain near Hesperia, California. All three crew members on board died. The accident was attributed to controlled flight into terrain in low visibility.
  • On December 7, 2023, a Bell 412EP operated by the Guyanese military went down carrying 2 crew and 5 senior officers at the border between Venezuela and Guyana during bad weather.

Specifications (Bell 412EP)

::figure[src="https://upload.wikimedia.org/wikipedia/commons/a/a6/Bell_412_Line_Drawing.svg"] ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/a/a2/Bell_412_transmission_and_head.jpg" caption="Rotor head and transmission of a Bell 412"] ::

|ref=International Directory of Civil Aircraft, Bell 412EP Product Specifications |prime units?=kts General characteristics

|crew=one-two pilots |capacity= up to 13 passengers, maximum external load of almost 6,614 lb (3,000 kg) |length ft=56 |length in=1 |length note=including rotors

  • Fuselage length: 43 ft |width ft= |width in= |width note= |height ft=15 |height in=0 |height note= |empty weight lb=6789 |empty weight note= |gross weight lb= |gross weight note= |max takeoff weight lb=11900 |max takeoff weight note= |fuel capacity= |more general=
  • Blade sections: root: Boeing VR-7; tip: Wortmann FX 71-H-080 Powerplant -- |eng1 number=1 |eng1 name=Pratt & Whitney Canada PT6T-3D Twin-Pac or PT6T-3DF Twin-Pac |eng1 type=coupled turboshaft engine - each |eng1 shp=1250 |eng1 note=

::::900 shp single power section emergency power

|rot number=1 |rot dia ft=46 |rot dia in=0 |rot area sqft=1662 |rot area note=

Performance

|max speed kts=140 |max speed note= |cruise speed kts=122 |cruise speed note= |never exceed speed kts= |never exceed speed note= |range nmi=529 |range note= |combat range nmi= |combat range note= |ferry range nmi= |ferry range note= |endurance= |ceiling ft=20000 |ceiling note= |climb rate ftmin=1350 |climb rate note= |time to altitude= |disc loading lb/sqft= |disc loading note= |fuel consumption lb/mi= |power/mass=0.2663 hp/lb |more performance= |avionics=

References

Citations

Sources

  • Hoyle, Craig. "World Air Forces Directory". Flight International, Vol. 180, No. 5321, 13–19 December 2011. pp. 26–52.

References

  1. "Subaru Bell's new pickup: the 412EPX".
  2. "Airliners.net".
  3. "Bell Helicopter LUH Submission Surpasses 3.1 Million Flight Hour Milestone".
  4. . (4 March 2013). ["Bell Helicopter Introduces the Bell 412EPI: Boosts Performance and Reliability"](http://investor.textron.com/news/news-releases/press-release-details/2013/Bell-Helicopter-Introduces-the-Bell-412EPI-Boosts-Performance-and-Reliability/default.aspx). *[[Textron]]*.
  5. "Bell / Agusta Bell 412 - Aerospace Technology".
  6. "Bell 412EP - program supplier guide {{!}} Airframer".
  7. HeliHub.com. (2021-10-21). "Royal Thai Air Force retires five older Bell 412s".
  8. "Subaru Bell's new pickup: the 412EPX".
  9. ESD. (2023-04-03). "Griffons of RAF Akrotiri Give Way to Pumas".
  10. {{usurped
  11. "Bell 412LUH".
  12. (2016). "[[Janes All the World's Aircraft". [[Janes Information Services.
  13. (23 October 2014). "Gandiwa: Konsep Helikopter Tempur “Gado-Gado” AH-64 Apache dan AH-1 Cobra".
  14. "Camp AKENO Junior Crew".
  15. [https://www.japantimes.co.jp/news/2014/06/11/national/european-u-s-helicopter-makers-bid-for-2b-japan-deal-sources/#.VDflYU3u2M8 "Foreign firms bid for $2 billion chopper deal"] {{Webarchive. link. (2018-06-22 . The Japan Times/Reuters, Accessed 10 October 2014.)
  16. Waldron, Greg. (June 20, 2018). "Bell targets Asia-Pacific attack helicopter opportunities". FlightGlobal.
  17. . (July 16, 2018). ["Subaru and Bell announce collaboration on commercial 412 helicopter upgrade"](https://investor.textron.com/news/news-releases/press-release-details/2018/SUBARU-AND-BELL-ANNOUNCE-COLLABORATION-ON-COMMERCIAL-412-HELICOPTER-UPGRADE/default.aspx).
  18. (4–10 December 2018). "UH-X approaches maiden sortie".
  19. (20 June 2022). "Subaru Bell's new pickup: the 412EPX". MHM Publishing Inc.
  20. "Thai Military Aircraft Designations".
  21. (14 February 2022). "Ventura County approves purchase of new 412EPX helicopter". AirMed&Rescue.
  22. (28 November 2023). "Inside The $20 Million Bell 412EPX". Aviation Base.
  23. (2023). "World Air Forces 2024". flightglobal.com.
  24. "Toll Helicopters pitches WOG-RW solution - Australian Defence Magazine".
  25. "Εξοπλισμός Εθνικής Φρουράς (Κύπρος)".
  26. "Iraq Approved To Buy Armed Bell 407M, 412M Helos {{!}} Aviation Week Network".
  27. (2021). "World Air Forces 2021". Flightglobal Insight.
  28. (2024). "World Air Forces 2025". Flightglobal Insight.
  29. "Arms transfer database".
  30. https://www.military.africa/2025/06/tunisian-air-force-purchases-12-subaru-bell-412epx-helicopters/#google_vignette
  31. "Turkey And Georgia Conducted A Naval Exercise".
  32. Hoyle, Craig. (2025). "World Air Forces 2026". [[FlightGlobal]].
  33. "RAC Rescue Helicopters".
  34. "RAC Rescue Helicopter fact sheet".
  35. "Queenslanders Gov.t Fleet". qld.gov.au.
  36. "Bell 412EPI helicopter for NSW Police Force".
  37. Team, Coulson. (2020-04-03). "New South Wales Rural Fire Service Awards 412 Fleet Operation & Maintenance to Coulson Aviation PTY".
  38. (2024-06-06). "MedSTAR". Wikipedia.
  39. "PF tem mais dois helicópteros que não levantam voo há quase dois anos". CorreioBraziliense.com.br.
  40. "New helos for the Coast Guard". janes.com.
  41. Johnson, Oliver. (5 January 2018). "Better, Faster, Stronger: The Canadian Coast Guard's new helicopter fleet". Vertical Magazine.
  42. "ARCHIVED - Bell 412 (ASRA)".
  43. "Le service héliporté de la Sûreté du Québec".
  44. (January 23, 2016). "BELL 412 -Aviación Policial de la Policía Nacional". [[National Police of Colombia]].
  45. O'Connor, Kate. (3 October 2022). "First Subaru Bell 412EPXs Sold In Europe". AVweb.
  46. "Policie České Republiky - Letecká služba - Technika".
  47. "The Border Guard's vessels and aircraft".
  48. Verma, Lalmani. (2015-08-13). "Uttar Pradesh: For Rs 124 cr, govt gets two new aircraft to bolster fleet".
  49. Srivastava, Anupam. (2025-08-08). "Agusta AW139 set to join UP’s aviation fleet". [[Hindustan Times]].
  50. (4 December 2018). "Polairud Dapatkan Heli Baru NBell-412 P-3003 Buatan PTDI".
  51. "کاموف ۲۲۶تی، آینده هلیکوپترهای امداد در ایران؟". BBC Persian.
  52. "AB-412 Guardia di Finanza". Helis.com.
  53. Roelofs, Erik. (April 2012). "Italy's Flying Foresters".
  54. "第二管区海上保安本部 仙台航空基地".
  55. Thompson, Paul [http://www.j-hangarspace.jp/police-air-units Police Air Units] {{Webarchive. link. (2017-02-10 ''J-HangarSpace'' Retrieved February 22, 2017)
  56. "Introduction (Coast guard, Korea, South), Coast guard". janes.com.
  57. "South Korean Coast Guard Bell 412EP".
  58. (16 November 2011). "Great Lake Saviors". Vertical Magazine.
  59. "Delaware Marks 40 Years of Service". © Copyright 2010 by the Airborne Law Enforcement Association.
  60. "History of the Air Support Division".
  61. "L.A. County Fire". Los Angeles county fire department.
  62. "Miami-Dade-Fire-Rescue". Miami-Dade County.gov.
  63. "NYPD Bell 412". Helis.com.
  64. "Orange County Fire Authority's New Bell 412 Fire and Rescue Helicopters". ©Copyright 2012 FDNNTV.com.
  65. "San-Diego-Fire signs for Bell-412". 2012 Copyright Shephard Press Limited.
  66. "Bald Eagle Rescue is a team effort".
  67. "New state-of-the-art helicopter arrives at Ventura County Aviation Unit".
  68. (July 2018). "State police secure funds to replace helicopter that crashed last summer, killing 2 troopers; new pilots being trained".
  69. (2015-01-31). "Aviation News – Royal Netherlands Air Force retires AB-412 and disbands 303 SAR Squadron".
  70. [http://lotniczapolska.pl/Bell-412-opuscil-Okecie,22818 Bell 412 opuścił Okęcie.] {{in lang. pl
  71. "Flota in oprema". policija.si.
  72. (2022-05-27). "Air Operations {{!}} Los Angeles Fire Department".
  73. {{harvnb. Cooper. Weinert. Hinz. Lepko. 2011
  74. (2016-04-11). "Remembering the John Heinz Tragedy, Twenty-Five Years Later".
  75. (September 17, 1991). "Aircraft Accident/Incident Summary Report". [[National Transportation Safety Board]].
  76. Times, Maeve Reston Maeve Reston is a former political reporter for the Los Angeles. (2006-12-12). "Air crews mourn 3 killed in Cajon Pass".
  77. (2021-04-20). "Aviation Investigation Final Report". National Transportation Safety Board.
  78. (2023-12-07). "Guyana military helicopter crash kills 5 officers and leaves 2 survivors".
  79. Reece, Maggie. (2023-12-09). "GDF Bell 412 Helicopter Crashes: Five Dead, Two Injured".
  80. Frawley, Gerald. ''The International Directory of Civil Aircraft, 2003/2004'', p. 45. Aerospace Publications, 2003. {{ISBN. 1-875671-58-7.
  81. "Bell Helicopter, January 2006".
  82. [http://www.aerospace-technology.com/projects/bell-412/ Bell/Agusta Bell 412 – Medium Transport Helicopter, USA/Italy] {{Webarchive. link. (2007-08-24 , Aerospace-Technology.com)
  83. "The Incomplete Guide to Airfoil Usage".

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