AircraftDirectives
Airworthiness Directive

AD 2013-22-01 Amendment 39-17633

Federal Aviation Administration · 14 CFR part 39

FR document
2013-25310
Amendment
39-17633
Published
2013-10-31
Models covered
2
Last live check
Not yet re-verified

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AD

2013-22-01

FR doc 2013-25310

AD 2013-22-01Published 2013-10-31Effective 2013-12-05

Requires replacing or reworking certain aft bearing caps.

Full official abstract

We are adopting a new airworthiness directive (AD) for Bell Model 206L-4 and 407 helicopters. This AD requires replacing or reworking certain aft bearing caps. This AD was prompted by the manufacture of certain freewheel aft bearing caps without a lubrication channel to allow oil flow into the aft bearing support assembly. The actions of this AD are intended to prevent failure of the freewheel unit and subsequent loss of control of the helicopter.

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Applies to 2 models in our index