Type Record · As of May 3, 2026
BELL 412
Rotorcraft · P&W CANADA PT6T-3 SERIES
Registered
12
Year Range
1986–2007
NTSB Events
2
Airworthiness Directives
48
Aircraft Resources
01 / Distribution
Where the fleet lives and was built
Counts of currently-registered BELL 412 aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.
By State (top 10)
- AK 25.0% 3
- CA 16.7% 2
- AZ 16.7% 2
- DE 16.7% 2
- VT 8.3% 1
- NV 8.3% 1
- FL 8.3% 1
By Decade of Manufacture
- 1980s 25.0% 3
- 1990s 41.7% 5
- 2000s 8.3% 1
- Unknown 25.0% 3
02 / NTSB Records
Events involving BELL 412 aircraft
2 event(s) on file. Showing the most recent 2.
-
Jun 26, 1988
N91419ATHOL, Idaho Fatal
NTSB Docket → -
May 26, 1983
N91419EPHRATA, Washington
NTSB Docket →
02b / NASA ASRS Reports
Near-miss reports involving BELL 412
NASA's voluntary, confidential reporting system surfaces what almost went wrong. 1 de-identified ASRS report references this airframe. Pilot-written narrative. ASRS reports are voluntary and not investigated — they represent the reporter's perspective and cannot infer prevalence.
02c / Academic Research
Scholarly work mentioning BELL 412
Papers and reports across NASA, NTSB, FAA CAMI, AOPA ASI, Embry-Riddle, arXiv, and the broader academic graph that mention this airframe. Title or keyword match — drill into each for full abstract + author list + PDF link.
Browse the full corpus — academia portal ↗
03 / Airworthiness Directives
FAA directives applicable to BELL 412
48 directive(s) on file. Showing the most recent 25 · 23 more in the Federal Register.
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Apr 24, 2026
Airworthiness Directives; B/E Aerospace Fischer GmbH Medical Seats
The FAA is adopting a new airworthiness directive (AD) for certain B/E Aerospace Fischer GmbH (B/E Aerospace Fischer) Medical Seats 230/305. This AD was prompted by a determination that certain medical seats that are certified for aft facing (AF) and forward facing (FF) installations have been delivered with an incorr…
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Feb 3, 2026
Airworthiness Directives; Leonardo S.p.a. Helicopters
The FAA is adopting a new airworthiness directive (AD) for all Leonardo S.p.a. Model AB412 and AB412 EP helicopters. This AD was prompted by reports of a cracked main gearbox (MGB) support case. This AD requires revising the existing rotorcraft flight manual (RFM) for the helicopter. The FAA is issuing this AD to addr…
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May 6, 2025
Airworthiness Directives; Thommen Aircraft Equipment AG Digital Air Data Computers
The FAA is correcting an airworthiness directive (AD) that published in the Federal Register. The AD applies to certain Thommen Aircraft Equipment AG (THOMMEN) AC32 Digital Air Data Computers (ADCs). As published, there were typographical errors in the some of the aircraft models in the applicability table. This docum…
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Apr 10, 2025
Airworthiness Directives; Thommen Aircraft Equipment AG Digital Air Data Computers
The FAA is adopting a new airworthiness directive (AD) for certain THOMMEN AIRCRAFT EQUIPMENT AG (THOMMEN) AC32 Digital Air Data Computers. This AD results from occurrences of AC32 Digital Air Data Computers (ADCs) that stop functioning below certain temperatures. This AD requires replacing an affected AC32 Digital AD…
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Oct 31, 2024
Airworthiness Directives; Various Helicopters
The FAA is adopting a new airworthiness directive (AD) for various helicopters modified by certain supplemental type certificates (STCs) that approve the installation of an emergency float kit or an emergency float with a liferaft kit. This AD was prompted by the results of an accident investigation and subsequent rep…
-
Oct 4, 2024
Airworthiness Directives; Bell Textron Inc. Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Inc. Model 212, 412, 412CF, and 412EP helicopters. This AD was prompted by reports of cracked tail boom attachment barrel nuts (barrel nuts). This AD requires replacing all steel alloy barrel nuts with nickel alloy barrel nuts, replacing o…
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Sep 30, 2024
Airworthiness Directives; THOMMEN AIRCRAFT EQUIPMENT AG Digital Air Data Computers
The FAA proposes to adopt a new airworthiness directive (AD) for certain THOMMEN AIRCRAFT EQUIPMENT AG (THOMMEN) AC32 Digital Air Data Computers. This proposed AD results from occurrences of AC32 Digital Air Data Computers (ADCs) that stop functioning below certain temperatures. This proposed AD would require replacin…
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Aug 20, 2024
Airworthiness Directives; Bell Textron Inc. (Type Certificate Previously Held by Bell Helicopter Textron, Inc.), Helicopters
The FAA is superseding Airworthiness Directive (AD) 2000-18- 09, which applied to certain Bell Helicopter Textron, Inc. (now Bell Textron Inc.), Model 412, 412CF, and 412EP helicopters. AD 2000-18-09 required repetitively inspecting the upper left-hand cap angle (cap angle) and adjacent structure for a crack and, depe…
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May 8, 2024
Airworthiness Directives; Bell Textron Inc., Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for certain Bell Textron Inc., Model 212, 412, 412CF, and 412EP helicopters. This proposed AD was prompted by reports of cracked tail boom attachment barrel nuts (barrel nuts). This proposed AD would require replacing all steel alloy barrel nuts with nickel…
-
Apr 25, 2024
Airworthiness Directives; Various Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for various helicopters modified by certain supplemental type certificates (STCs) that approve the installation of an emergency float kit or an emergency float with liferaft kit. This proposed AD was prompted by the results of an accident investigation and s…
-
Mar 15, 2024
Airworthiness Directives; Leonardo S.p.a. Helicopters
The FAA is adopting a new airworthiness directive (AD) for all Leonardo S.p.a. Model AB412 and AB412 EP helicopters. This AD was prompted by reports of cracks in the lateral mounts of the main transmission support case. This AD requires repetitive visual inspections and fluorescent penetrant inspections (FPI) and, dep…
-
Dec 6, 2023
Airworthiness Directives; Leonardo S.p.a. Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for all Leonardo S.p.a. Model AB412 and AB412 EP helicopters. This proposed AD was prompted by reports of cracks in the lateral mounts of the main transmission support case. This proposed AD would require repetitive visual inspections and fluorescent penetra…
-
Nov 21, 2022
Airworthiness Directives; Bell Textron Inc., Helicopters and Various Restricted Category Helicopters
The FAA is adopting a new airworthiness directive (AD) for Bell Textron Inc., Model 204B, 205A, 205A-1, 205B, 210, 212, 412, 412CF, and 412EP helicopters and various restricted category helicopters. This AD was prompted by reports of cracks found on the main transmission support case. This AD requires repetitive inspe…
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Nov 7, 2022
Airworthiness Directives; Bell Textron Inc., Erickson 214 Holdings, LLC, Leonardo S.p.a., and Various Restricted Category Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Inc., Model 204B, 205A, 205A-1, 205B, 210, 212, 412, 412CF, and 412EP helicopters; certain Erickson 214 Holdings, LLC, Model 214B and 214B-1 helicopters; certain Leonardo S.p.a. Model AB412 and AB412 EP helicopters; and certain various res…
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Jun 1, 2022
Airworthiness Directives; Bell Textron Inc. Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Inc. Model 212, 412, 412CF, and 412EP helicopters. This AD was prompted by a report of a cracked check valve. This AD requires inspecting certain engine oil and fuel check valves, and depending on the results, repetitively inspecting and r…
-
Apr 14, 2022
Airworthiness Directives; Bell Textron Inc., Helicopters and Various Restricted Category Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for Bell Textron Inc., Model 204B, 205A, 205A-1, 205B, 210, 212, 412, 412CF, and 412EP helicopters and various restricted category helicopters. This proposed AD was prompted by reports of cracks found on the main transmission support case. This proposed AD w…
-
Apr 4, 2022
Airworthiness Directives; Bell Textron Inc. Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Inc. Model 205A, 205A-1, 205B, 210, 212, 412, 412CF, and 412EP helicopters with a certain part-numbered tailboom left hand fin spar cap (spar cap) installed. This AD was prompted by reports of cracked spar caps. This AD requires inspecting…
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Mar 31, 2022
Airworthiness Directives; Bell Textron Inc., Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for certain Bell Textron Inc., Model 212, 412, 412CF, and 412EP helicopters. This proposed AD was prompted by a report of a cracked check valve. This proposed AD would require inspecting certain engine oil and fuel check valves, and depending on the results,…
-
Mar 23, 2022
Airworthiness Directives; Bell Textron Inc., Helicopters
The FAA is adopting a new airworthiness directive (AD) for Bell Textron Inc., Model 412, 412EP, and 412CF helicopters. This AD was prompted by evaluation results showing flight loads that impact the collective lever fatigue life. This AD requires adding a permanent hours time-in-service (TIS) penalty for certain colle…
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Mar 16, 2022
Airworthiness Directives; Goodrich Externally-Mounted Hoist Assemblies
The FAA is adopting a new airworthiness directive (AD) for various model helicopters with certain part-numbered Goodrich externally-mounted hoist assemblies (hoists) installed. This AD was prompted by hoists failing lower load limit inspections. This AD requires replacing unmodified hoists, installing placards, revisi…
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Jan 21, 2022
Airworthiness Directives; Bell Textron Inc. Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for certain Bell Textron Inc. Model 205A, 205A-1, 205B, 210, 212, 412, 412CF, and 412EP helicopters with a certain part-numbered tailboom left hand fin spar cap (spar cap) installed. This proposed AD was prompted by reports of cracked spar caps. This propose…
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Nov 22, 2021
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 430 helicopters. This AD was prompted by an in-flight failure of the main rotor (M/R) pitch link clevis (clevis) due to fatigue damage and excessive wear. This AD requires a visual inspection of the M/R clevis, rod end…
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Sep 30, 2021
Airworthiness Directives; Goodrich Externally-Mounted Hoist Assemblies
The FAA is revising a notice of proposed rulemaking (NPRM) for various model helicopters with certain part-numbered Goodrich externally-mounted hoist assemblies (hoists) installed. This action revises the NPRM by adding a figure and revising certain requirements. The FAA is proposing this airworthiness directive (AD)…
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Aug 27, 2021
Airworthiness Directives; Bell Textron Inc., Helicopters
The FAA proposes to adopt a new airworthiness directive (AD) for Bell Textron Inc., Model 412, 412EP, and 412CF helicopters. This proposed AD was prompted by evaluation results showing flight loads that impact the collective lever fatigue life. This proposed AD would require adding a permanent life penalty for certain…
-
Dec 11, 2020
Airworthiness Directives; Goodrich Externally-Mounted Hoist Assemblies
The FAA proposes to adopt a new airworthiness directive (AD) for various model helicopters with certain part-numbered Goodrich externally-mounted hoist assemblies (hoists) installed. This proposed AD would require replacing unmodified hoists, installing placards, revising the existing Rotorcraft Flight Manual (RFM) fo…
04 / Type Certificate Data Sheets
FAA TCDS for BELL 412
The TCDS is the legal certification document — weight limits, performance, equipment, AD compliance times, operating limitations. 1 match in the FAA catalog.
- H4SW Historical Rev 31 · 12/21/2016
Bell Helicopter Textron Inc.
Models: 412, 412CF, 412EP, 212
06 / Supplemental Type Certificates
Modifications approved for BELL 412
734 STCs on file — every FAA-approved modification, alteration, or installation for this aircraft. STOL kits, avionics, fuel systems, floats, engine swaps, you name it.
-
02/05/2026
STC SH3261SO
Installation of replacement skid tubes.
Bell Helicopter Textron Inc.
-
11/21/2025
STC SR12148LA
Installation of modified configurations of the Bell Helicopter Textron (BHT) Model 412 “Arm and Bearing Assembly”
Extex Engineered Products
-
09/30/2025
STC SR04465NY
Installation of the iPad Mount
Avio Design Group Inc
-
08/27/2025
STC SR00258DE
Installation of an articulating patient loading system.
Air Methods LLC
-
07/15/2025
STC SR09922AC
Installation of a Foresight MX Condition Monitoring System
GPMS International Inc.
-
07/11/2025
STC SR12068IB
Installation of the AFI4700 Electronic Flight Instrument
Alpine Aerotech LP
-
07/09/2025
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 AM…
Icarus Aero Inc.
-
02/06/2025
STC SH8610SW
Fabrication of Isolair Eliminator II Model 4600-212/412 Fire Fighting System
Isolair Inc.
-
01/20/2025
STC SR02590AK
Installation of Bell Lightweight Tailboom Modification
StandardAero Atlantic USA Inc.
-
11/04/2024
STC SR00113DE-D
lnstallation of an Air Methods, LLC, Emergency Medical System interior
Air Methods LLC
-
11/04/2024
STC SR00118DE-D
Installation of a standby attitude indicator battery annunciator system.
Air Methods LLC
-
11/04/2024
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 Tran…
Air Methods LLC
-
11/04/2024
STC SR00107DE-D
Installation of an Air Methods, LLC, Emergency Medical System interior
Air Methods LLC
-
10/08/2024
STC SR00855DE
Installation of Tracking Patient Loading System
Air Methods LLC
-
07/11/2024
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 appro…
HARTZELL PROPELLER LLC
-
05/08/2024
STC SR01779LA
Installation of the Emergency Float Kits
Dart Aerospace ULC
-
03/27/2024
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
-
12/07/2023
STC SH3894SW
Installation of 9-place forward facing airline seats.
Bell Textron Inc.
-
12/07/2023
STC SR09343RC
Installation of Aero Seats and Systems, Inc., Life Raft Deployment System (LRDS)
Bell Textron Inc.
-
10/27/2023
STC SR00145IB
Installation of LH and RH Vertical Reference Door(s)
Transwest Helicopters Ltd.
-
10/17/2023
STC SR00142IB
Installation of the Integrated Health and Usage Monitoring System (HUMS)
RMCI Canada Inc.
-
10/10/2023
STC SR00141IB
Installation of the Aft Pedestal Stowage Compartment
Alpine Aerotech LP
-
08/22/2023
STC SH4056NM
Installation of pneumatic door actuators.
Dart Aerospace USA Inc.
-
04/14/2023
STC SH3319NM
Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,
Precise Flight Inc
-
02/03/2023
STC SR00871LA
Installation of the Modular Seating System
LifePort LLC
-
12/05/2022
STC SR00080IB
Installation of the Garmin GRA 55 Radar Altimeter
Alpine Aerotech LP
-
09/21/2022
STC SR03832NY
Installation of Full Vertical Reference Door P/N D412-761 for Left Hand Vertical Reference Operations
Dart Aerospace Limited
-
09/19/2022
STC SH1543GL
Remove skid landing gear replacing same with a fixed (non-retracting), wheeled, tricycle landing gear.
Kaman Corporation Aircraft Wheel and Brake LLC
-
09/19/2022
STC SH1651GL
Remove skid landing gear replacing same with a fixed (non-retracting), wheeled, tricycle landing gear.
Kaman Corporation Aircraft Wheel and Brake LLC
-
08/22/2022
STC SR00058IB
Installation of J301A Audio Controller
Alpine Aerotech LP
+ 704 more STCs on file
07 / PMA replacement parts
FAA-approved replacement parts for BELL 412
60+ parts on file from the FAA Parts Manufacturer Approval database. Each is a non-OEM part the FAA has authorized for use as a replacement on this aircraft type.
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MDL-BLR-412FF-040#https://drs.faa.gov/browse/excelExternalWindow/3809F37C6D6D6C9B862583B60075ED53.0001##
MDL-BELL 412 FastFin SYSTEM
BLR Aerospace LLC replaces Modification Part
PMA holder → -
TAI-4040-809-3#https://drs.faa.gov/browse/excelExternalWindow/AE291DFB2FF12F478625836A0050290A.0001##
Clamp, Curvic Tail Rotor
Extex Engineered Products Inc replaces 204-040-809-3
PMA holder → -
4AA-340-001-101#https://drs.faa.gov/browse/excelExternalWindow/EFD7262C220F15BB862578ED0063772B.0001##
Seal
Able Aerospace Services, Inc. replaces 412-340-001-101
PMA holder → -
21200003-1#https://drs.faa.gov/browse/excelExternalWindow/10DDBD889895697786257823005080F0.0001##
TAIL/ROTOR FLDLT INST'L [KIT]
Devore Aviation Corp of America replaces Modification Part
PMA holder → -
LORD412-340-102101#https://drs.faa.gov/browse/excelExternalWindow/5FCEE8A62287580D86258554004B3080.0001##
Main Rotor Oil Boot
Lord Corporation replaces 412-340-102-101
PMA holder → -
124.040-1#https://drs.faa.gov/browse/excelExternalWindow/A2501D8372BCDC8686258331005979A9.0001##
INDICATOR DUAL VOLTS AC/DC
ROGERSON AIRCRAFT EQUIPMENT GROUP replaces 209-070-263-003
PMA holder → -
122Y025#https://drs.faa.gov/browse/excelExternalWindow/6DA65D43D440BD0586258313004D9E57.0001##
Indicator Oil Temp & Pressure
ROGERSON AIRCRAFT EQUIPMENT GROUP replaces 209-070-262-109
PMA holder → -
536841AA#https://drs.faa.gov/browse/excelExternalWindow/2D3AAF7EE839A96F862580CE007492CA.0001##
Sleeve
Able Aerospace Services, Inc. replaces 536841
PMA holder → -
L-177045-01-01#https://drs.faa.gov/browse/excelExternalWindow/086D9F8E89E3AF548625807D00695378.0001##
Flight Data Recorder
Symetrics Industries dba Extant Aerospace replaces 177045-01-01
PMA holder → -
B00-13003#https://drs.faa.gov/browse/excelExternalWindow/BB1AD6D3D9FB015486257FE7006FE34B.0001##
Electric Motor Driven Air Conditioner
APICAL INDUSTRIES, INC. dba DART AEROSPACE replaces Modification Part
PMA holder → -
B00-13002#https://drs.faa.gov/browse/excelExternalWindow/0C73E2278E592C0886257FE7006FE3A4.0001##
Auxiliary Generator Power System
APICAL INDUSTRIES, INC. dba DART AEROSPACE replaces Modification Part
PMA holder → -
ERA Drawing List 41252-1000#https://drs.faa.gov/browse/excelExternalWindow/1118F6AB02A1CD7C86257FCB00434D6A.0001##
Step and Baggage Compartment
APICAL INDUSTRIES, INC. dba DART AEROSPACE replaces Modification Part
PMA holder → -
42305-720#https://drs.faa.gov/browse/excelExternalWindow/0AF8785F1785452186257E45006B47F9.0001##
Pendant
Goodrich Corporation replaces 42305-720
PMA holder → -
4RP-340-102-101#https://drs.faa.gov/browse/excelExternalWindow/55E15B2674D5854686257E36005F73C7.0001##
Boot
Replacement Part Solutions LLC replaces Bell 412-340-102-101
PMA holder → -
4AA-340-100-101#https://drs.faa.gov/browse/excelExternalWindow/4937F3A482756AD086257A9B004BDBCC.0001##
Seal
Replacement Part Solutions LLC replaces Bell P/N 412-340-100-101
PMA holder → -
42305-720#https://drs.faa.gov/browse/excelExternalWindow/713FC7EDFB3805E286257A3A004F89F8.0001##
Pendant
Goodrich Corporation replaces 42305-720
PMA holder → -
50971-1#https://drs.faa.gov/browse/excelExternalWindow/049EF4F3E87357FD8525704A005579A1.0001##
Signal Cond. Mast Torque
Rogerson Kratos replaces Bell Helicopter 412-375-003-103
PMA holder → -
All parts listed on Dwg 141-9007#https://drs.faa.gov/browse/excelExternalWindow/6812F6189A50479A8525703B0055E288.0001##
Air Medical Transport Unit
Air Methods Corp International replaces Modification Part
PMA holder → -
Dwg 040-0147#https://drs.faa.gov/browse/excelExternalWindow/88D7B31089B7EE418525703B0058484A.0001##
Freon Air Conditioning System
Air Methods Corp International replaces Modification part
PMA holder → -
All parts listed on Dwg 141-9006#https://drs.faa.gov/browse/excelExternalWindow/9BF74FD9D1EA01978525703B0055E454.0001##
Main Rotor Electrostatic Bonding Straps
Air Methods Corp International replaces Modification Part
PMA holder → -
MDL 149-9016#https://drs.faa.gov/browse/excelExternalWindow/129809462B0BF7208525703B00584B8F.0001##
Battery Annuciator System
Air Methods Corp International replaces Modification Part
PMA holder → -
7MA1034-1#https://drs.faa.gov/browse/excelExternalWindow/FC6E96B62144CC438625744B0064121F.0001##
Float Assembly
B/E Aerospace Inc, DBA, SMR Technologies Inc replaces Bell Helicopter P/N 412-050-013-111
PMA holder → -
7MA1061-1#https://drs.faa.gov/browse/excelExternalWindow/AA3F2F55477727AB8625744B0064123B.0001##
Float Assembly
B/E Aerospace Inc, DBA, SMR Technologies Inc replaces Bell Helicopter P/N 412-050-013-117
PMA holder → -
7MA1033-1#https://drs.faa.gov/browse/excelExternalWindow/8454F93972DD683B8625744B006411FD.0001##
Float Assembly
B/E Aerospace Inc, DBA, SMR Technologies Inc replaces Bell Helicopter P/N 412-050-013-109
PMA holder → -
7MA1062-1#https://drs.faa.gov/browse/excelExternalWindow/03B11A3839C648208625744B0064125D.0001##
Float Assembly
B/E Aerospace Inc, DBA, SMR Technologies Inc replaces Bell Helicopter P/N 412-050-013-119
PMA holder → -
67A365#https://drs.faa.gov/browse/excelExternalWindow/EDF0DAFD487E82DD86257D5C005FFC80.0001##
Actuator, Rotary
Globe Motors replaces Bell Helicopter 412A-301-300-103
PMA holder → -
67A364#https://drs.faa.gov/browse/excelExternalWindow/44CC7B156E4D509686257D5C005FFC09.0001##
Actuator, Rotary
Globe Motors replaces Bell Helicopter 412-301-300-101
PMA holder → -
HD412-00-0067 Rev. B Dtd. 12-2-87#https://drs.faa.gov/browse/excelExternalWindow/B44AEEB7C621FA708625758A0050C29F.0001##
Installation of Medical Interior Configuration
Heli-Dyne Systems Inc replaces -
PMA holder → -
HD412-00-0068 Rev. A Dtd. 12-2-87#https://drs.faa.gov/browse/excelExternalWindow/EBBA48ED1FEF4FEE8625758A0050C2E5.0001##
Installation of Medical Interior Configuration
Heli-Dyne Systems Inc replaces -
PMA holder → -
HD412-00-0051 Rev. B Dtd. 12-2-87#https://drs.faa.gov/browse/excelExternalWindow/432A07E0B6E3A1538625758A0050C32E.0001##
Installation of Fixed Step
Heli-Dyne Systems Inc replaces -
PMA holder → -
42HP1500#https://drs.faa.gov/browse/excelExternalWindow/F51DDEBB3448A29E8625758A0050C13B.0001##
Hoist Installation Provisions Kit Rev. C .dtd 11/6/86
Heli-Dyne Systems Inc replaces -
PMA holder → -
HDSTD-70-1001#https://drs.faa.gov/browse/excelExternalWindow/8D8E80099E6291A78625758A00522EAF.0001##
Installation - E.S.I. Air Conditioner Drawing List No. HB412-00-0083, Rev. B Dated 1/9/89
Heli-Dyne Systems Inc replaces -
PMA holder → -
HD412-00-0005 Rev. E Dtd. 12-1-87#https://drs.faa.gov/browse/excelExternalWindow/72D3DBBB5BB0B9F78625758A0050C375.0001##
Installation of Rappel System, Left/Right Egress Capabilities
Heli-Dyne Systems Inc replaces -
PMA holder → -
HD412-00-0058#https://drs.faa.gov/browse/excelExternalWindow/32602D1203BD73AF8625758A0055A803.0001##
Center Medical Attendant Seat and Tracks
Heli-Dyne Systems Inc replaces -
PMA holder → -
HD412-00-0059#https://drs.faa.gov/browse/excelExternalWindow/3C73B294C027D8698625758A0055A7D0.0001##
Attendant Seat L/H and R/H with track
Heli-Dyne Systems Inc replaces -
PMA holder → -
HD412-05-1001#https://drs.faa.gov/browse/excelExternalWindow/8A9D297BC23CF46C8625758A0050C0A3.0001##
Installation Nightsun
Heli-Dyne Systems Inc replaces -
PMA holder → -
B00-13002#https://drs.faa.gov/browse/excelExternalWindow/5EAFC90BA9382DF4862573FB004D32E5.0001##
Auxiliary Generator Power System
APICAL INDUSTRIES, INC. dba DART AEROSPACE replaces Modification Parts
PMA holder → -
B00-13003#https://drs.faa.gov/browse/excelExternalWindow/777589EB1F14022B862573FB004D3312.0001##
Electric Motor Driven Air Conditioner
APICAL INDUSTRIES, INC. dba DART AEROSPACE replaces Modification Parts
PMA holder → -
(per) ERA Aviation Drawing List 41228-2000#https://drs.faa.gov/browse/excelExternalWindow/4D7877F69230C5D48625734800558A4C.0001##
External Auxiliary Fuel System
APICAL INDUSTRIES, INC. dba DART AEROSPACE replaces Modification Parts
PMA holder → -
ERA Drawing List 41252-1000#https://drs.faa.gov/browse/excelExternalWindow/365BFC7C9243BD44862573480055895D.0001##
Step and Baggage Compartment
APICAL INDUSTRIES, INC. dba DART AEROSPACE replaces Modification Parts
PMA holder →
+ 20 more PMA parts on file
04 / Regulations watching this type
Advisory Circulars and Federal Register activity for BELL 412
Advisory Circulars
No ACs explicitly mention this type. Showing universal operating-rule ACs that apply to all aircraft.
Recent Federal Register activity
Latest rulemakings touching general operating rules (Part 91) and maintenance rules (Part 43).
- 2026-04-17 Settlement Policy for Small Unmanned Aircraft System (UAS) Cases FR ↗
- 2026-02-10 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period; Denial of Extension FR ↗
- 2026-02-02 25-Hour Cockpit Voice Recorder (CVR) Requirement, New Aircraft Production FR ↗
- 2026-01-28 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period FR ↗
- 2026-01-07 Requirements for Interference-Tolerant Radio Altimeter Systems FR ↗
05 / Aircraft of this type
All 12 registered N-numbers
Every tail currently on the FAA registry for this make/model. Click an N-number to query the FAA Aircraft Inquiry; rows flagged ● have NTSB events on file. Tails seeded with full TallyAero pages link directly.
| N-number | St | Year | NTSB | FAA |
|---|---|---|---|---|
| N143PH | AK | — | · | Look up ↗ |
| N156MH | VT | — | · | Look up ↗ |
| N17LA | CA | 1992 | · | Look up ↗ |
| N18LA | CA | 1992 | · | Look up ↗ |
| N397AL | AK | 1990 | · | Look up ↗ |
| N402ES | AK | 1988 | · | Look up ↗ |
| N411DE | NV | 1991 | · | Look up ↗ |
| N412QK | AZ | 1986 | · | Look up ↗ |
| N470QL | FL | 1989 | · | Look up ↗ |
| N860AR | DE | 1990 | · | Look up ↗ |
| N91419 | AZ | — | ● | Look up ↗ |
| N979AC | DE | 2007 | · | Look up ↗ |
Source — FAA Aircraft Registry · click "Look up" to query the live registry record (owner, address, last airworthiness)
05 / Sources & Methodology
Every count traces back to a primary US-government source
- FAA Aircraft Registry →
Refreshed Apr 27, 2026
Available
- NTSB CAROL →
Refreshed Apr 27, 2026
Available
- Federal Register (FAA Airworthiness Directives) →
Refreshed Apr 27, 2026
Available
We render counts and lists as the agency publishes them. Read the methodology →