Bell 412 airworthiness directives

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An Airworthiness Directive is a legally enforceable FAA rule (14 CFR 39.3). This page is where you look one up by number, subject or aircraft, see what is still in force, and open the official Federal Register record. How we source and re-check every directive.

Newest active directives

1. ADAD 2024-16-19Requires replacing all steel alloy barrel nuts with nickel alloy barrel nuts, replacing or inspecting other…Bell Textron Inc. HelicoptersEffective 2024-11-08
2. ADAD 2024-16-01Bell Textron Inc. (Type Certificate Previously Held by Bell Helicopter Textron, Inc.), HelicoptersEffective 2024-09-04
3. ADAD 2022-20-14Requires repetitive inspections of the main transmission housing assembly for cracks, pitting, and corrosion…Bell Textron Inc., Helicopters and Various Restricted Category HelicoptersEffective 2022-12-27
4. ADAD 2022-22-12Requires determining the total number of landings on certain part-numbered forward crosstubes and…Bell Textron Inc., Erickson 214 Holdings, LLC, Leonardo S.p.a., and Various Restricted Category HelicoptersEffective 2022-11-22
5. ADAD 2022-11-19Requires inspecting certain engine oil and fuel check valves, and depending on the results, repetitively…Bell Textron Inc. HelicoptersEffective 2022-07-06
6. ADAD 2022-07-02Requires inspecting each spar cap and depending on the inspection results, removing the spar cap from service.Bell Textron Inc. HelicoptersEffective 2022-05-09
7. ADAD 2022-07-03Requires adding a permanent hours time-in-service (TIS) penalty for certain collective levers and prohibits…Bell Textron Inc., HelicoptersEffective 2022-04-27
8. ADAD 2020-22-07Requires revising the existing Rotorcraft Flight Manual (RFM) for your helicopter.Bell Textron Inc. (Type Certificate Previously Held by Bell Helicopter Textron Inc.) HelicoptersEffective 2020-11-18
9. ADAD 2020-16-10Requires removing comfort clips from service and inspecting the seat belt shoulder harness (harness) for a…Bell Textron Inc. (Type Certificate Previously Held by Bell Helicopter Textron Inc.) HelicoptersEffective 2020-09-03
10. ADAD 2020-12-10Prompted by new manufacturing and inspection procedures implemented by Bell that correct the unsafe…Bell Textron Inc. (Type Certificate Previously Held by Bell Helicopter Textron Inc.) HelicoptersEffective 2020-07-16
11. ADAD 2020-02-11Requires replacing the affected inverter with a new inverter.Bell Helicopter Textron Inc. HelicoptersEffective 2020-03-17
12. ADAD 2019-09-02Corrects: This AD was prompted by the discovery that we omitted a helicopter model from one of the required…Bell Helicopter Textron, Inc. (Bell) HelicoptersEffective 2019-06-04
13. ADAD 2018-16-14Requires replacing the emergency flotation system (EFS) tube assembly.Bell Helicopter Textron Inc., HelicoptersEffective 2018-10-04
14. ADAD 2013-20-18Prompted by fatigue analysis that shows the retirement life should be reduced on certain yokes.Bell Helicopter Textron, Inc. (Bell) HelicoptersEffective 2013-11-29
15. ADAD 2013-16-16Requires adding a life limit of 10,000 landings to the crosstube and removing from service any crosstubes…Agusta S.p.A. and Bell Helicopter Textron HelicoptersEffective 2013-09-17
16. ADAD 2013-15-02We are superseding Airworthiness Directive (AD) 2008-10-03 for Bell Helicopter Textron Helicopters (Bell)…Bell Helicopter Textron HelicoptersEffective 2013-08-14
17. ADAD 2013-05-14Requires establishing a lower life limit on certain swashplate outer ring assemblies (outer ring), revising…Bell Helicopter Textron, Inc.Effective 2013-04-26
18. ADAD 2012-22-11Requires a repetitive inspection of the collective lever for a crack, and if there is a crack, before…Bell Helicopter Textron HelicoptersEffective 2012-12-20
19. ADAD 2012-22-06Requires counting and recording the total number of landings for the crosstubes, and inspecting the…Aeronautical Accessories, Inc., High Landing Gear Forward Crosstube AssemblyEffective 2012-12-14
20. ADAD 2012-14-12Requires inspecting each affected tail rotor blade (blade) forward tip weight retention block (tip block)…Various Restricted Category HelicoptersEffective 2012-09-04
21. ADAD 2010-26-52Prompted by another incident in which the blade tip weight separated from a blade during flight, causing…Bell Helicopter Textron, Inc. Model 204B, 205A, 205A-1, 205B, 210, 212, 412, 412CF, 412EP HelicoptersEffective 2011-11-15
22. ADAD 2010-10-16Requires replacing certain AAI serial-numbered crosstubes installed on these model helicopters.Bell Helicopter Textron (Bell) Model 205A, 205A-1, 205B, 212, 412, 412EP, and 412CF and Agusta S.p.A. (Agusta) Model AB412, AB412EP HelicoptersEffective 2010-06-08
23. ADAD 2007-19-53Requires replacing each affected tail rotor blade (blade) with an airworthy blade with a serial number not…Bell Helicopter Textron, Inc. Model 204B, 205A, 205A-1, 205B, 210, 212, 412, 412EP, and 412CF HelicoptersEffective 2007-12-05
24. ADAD 2007-22-02Requires inspecting each affected tail rotor blade (blade) forward tip weight retention block (tip block)…Bell Helicopter Textron, Inc. Model 205A, 205A-1, 205B, 212, 412, 412CF, and 412EP HelicoptersEffective 2007-11-30
25. ADAD 2005-20-38Requires inspecting a certain part-numbered reservoir assembly adapter (adapter) for the counter bore depth…Bell Helicopter Textron Model 212, 412, and 412EP HelicoptersEffective 2005-10-28
26. ADAD 2002-09-04Requires inspecting each affected tail rotor blade forward tip weight retention block (tip block) and the…Bell Helicopter Textron, Inc. Model 205A, 205A-1, 205B, 212, 412, 412EP, and 412CF HelicoptersEffective 2002-06-07
27. ADAD 2001-13-01Requires removing each existing tail rotor counterweight bellcrank (bellcrank) retention nut (retention…Bell Helicopter Textron, Inc. Model 205A-1, 205B, 212, 412, 412EP, and 412CF HelicoptersEffective 2001-08-01
28. ADAD 2001-09-11Requires a temporary reduction of the never-exceed velocity (Vne) limitation until an inspection of the tail…Bell Helicopter Textron, Inc. Model 412 Helicopters and Agusta S.p.A. Model AB412 HelicoptersEffective 2001-06-11
29. ADAD 2001-08-04Requires inspecting the locking washer on each main rotor actuator (actuator) for twisting or damage to the…Bell Helicopter Textron Inc. Model 205A-1, 205B, 212, 412, 412CF, and 412EP HelicoptersEffective 2001-05-03
30. ADAD 2000-25-03Requires inspecting the locking washer on each main rotor actuator (actuator) for twisting or damage to the…Bell Helicopter Textron Inc. Model 205A-1, 205B, 212, 412, and 412CF HelicoptersEffective 2000-12-28
31. ADAD 99-23-23Requires inspecting and measuring the thickness of certain main rotor yoke assemblies.Bell Helicopter Textron, Inc. Model 412, 412EP and 412CF HelicoptersEffective 1999-12-01
32. ADAD 98-07-03Requires a temporary reduction of the never-exceed velocity (Vne) limitation until an inspection of the tail…Bell Helicopter Textron, Inc. Model 412 Helicopters and Agusta S.p.A. Model AB412 HelicoptersEffective 1998-04-08
33. ADAD 97-11-04Requires creation of a component history card or equivalent record using a Retirement Index Number (RIN)…Bell Helicopter Textron, Inc. Model 412 and 412EP HelicoptersPublished 1997-05-20
34. ADAD 97-07-06Requires a daily inspection of certain swashplate support assemblies.Bell Helicopter Textron, Inc. Model 412 HelicoptersEffective 1997-05-09
35. ADAD 96-21-13Requires either installing a placard adjacent to each primary attitude indicator which states that flight is…LITEF GmbH Attitude Heading System (AHRS) Unit Model LCR-92, LCR-92S, and LCR-92HEffective 1996-11-12

Older directives by publication year: 2026 · 2025 · 2024 · 2023 · 2022 · 2021 · 2020 · 2019 · 2018 · 2017 · 2016 · 2015 · 2014 · 2013 · 2012 · 2011 · 2010 · 2009 · 2008 · 2007 · 2006 · 2005 · 2004 · 2003 · 2002 · 2001 · 2000 · 1999 · 1998 · 1997 · 1996 · 1995

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