Airworthiness Directives; Viking Air Limited Model DHC-3 (Otter) Airplanes
airworthiness · Rule · Final rule; request for comments. · Published 2011-06-02 · Effective 2011-06-02 · 76 FR 31800
Document
Document number
2011-13532
Federal Register citation
76 FR 31800
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Viking Air Limited Model DHC-3 (Otter)
Publication date
2011-06-02
Effective date
2011-06-02
FAA docket
Docket No. FAA-2011-0543
Abstract
We are adopting a new airworthiness directive (AD) for the products listed above that are equipped with a Honeywell TPE331-10 or - 12JR turboprop engine installed per Supplemental Type Certificate (STC) SA09866SC. This AD requires incorporating revised airspeed limitations and marking the airspeed indicator accordingly. There is also a requirement for the installation of a temporary placard until the airspeed indicator can be modified but not to exceed a certain period of time. This AD was prompted by analysis that showed that airspeed limitations for the affected airplanes are not adjusted for the installation of a turboprop engine as stated in the regulations. We are issuing this AD to prevent the loss of airplane structural integrity due to the affected airplanes being able to operate at speeds that exceed the speeds established in the Federal aviation regulations for safe operation.