# Search: 427

Proposed ADs: 11 matches in release 2026-11-13. Page 1.

- [NPRM 2002-SW-19-AD](https://openairdocs.org/proposed/2002-SW-19-AD.md): Bell Helicopter Textron Canada · Published Oct 18, 2002
  > Airworthiness Directives; Bell Helicopter Textron Canada Limited Model **427** Helicopters
- [NPRM 2001-SW-43-AD](https://openairdocs.org/proposed/2001-SW-43-AD.md): Bell Helicopter Textron Canada · Published Nov 28, 2001
  > Airworthiness Directives; Bell Helicopter Textron Canada Model **427** Helicopters
- [NPRM FAA-2010-0866](https://openairdocs.org/proposed/FAA-2010-0866.md): Bell Helicopter Textron Canada · Published Aug 30, 2010
  > …Tail rotor driveshaft hanger bearing bracket part number (P/N) **427**-044-223-101 has been…
- [NPRM 2001-SW-43-AD](https://openairdocs.org/proposed/2001-SW-43-AD.md): Bell Helicopter Textron Canada · Published Oct 18, 2002
  > Airworthiness Directives; Bell Helicopter Textron Canada Limited Model **427** Helicopters
- [NPRM FAA-2009-0227](https://openairdocs.org/proposed/FAA-2009-0227.md): Bell Helicopter Textron Canada · Published Mar 23, 2009
  > Airworthiness Directives; Bell Helicopter Textron Canada Model **427** Helicopters
- [NPRM FAA-2012-0084](https://openairdocs.org/proposed/FAA-2012-0084.md): Bell Helicopter Textron Canada · Published Feb 3, 2012
  > …Bell Helicopter Textron Canada Limited (BHTC) Model **427** helicopters. This proposed AD is prompted by a…
- [NPRM FAA-2017-1105](https://openairdocs.org/proposed/FAA-2017-1105.md): Bell Helicopter Textron Canada · Published Jun 1, 2018
  > …for Bell Helicopter Textron Canada (BHTC) Model **427** helicopters. This proposed AD would require inspecting the…
- [NPRM FAA-2025-1727](https://openairdocs.org/proposed/FAA-2025-1727.md): Bell Textron Canada · Published Aug 5, 2025
  > …certain Bell Textron Canada Limited (Bell) Model **427** helicopters. This proposed AD was prompted by a…
- [NPRM FAA-2013-0400](https://openairdocs.org/proposed/FAA-2013-0400.md): Bell Helicopter Textron Canada · Published May 13, 2013
  > …206L-4, 222, 222B, 222U, 230, 407, **427**, and 430 helicopters. This proposed AD would require…
- [NPRM FAA-2021-0539](https://openairdocs.org/proposed/FAA-2021-0539.md): Bell Textron Canada · Published Jul 6, 2021
  > …206L-4, 222, 222B, 222U, 230, 407, **427**, 429, and 430 helicopters. This proposed AD would…
- [NPRM FAA-2014-0643](https://openairdocs.org/proposed/FAA-2014-0643.md): Bell Helicopter Textron Canada · Published Sep 15, 2014
  > …for Bell Model 206L-4, 407, and **427** helicopters. AD 2001-13-51 currently requires inspecting…

All collections: https://openairdocs.org/search.md?q=427