2011-12-02
FR doc 2011-13532 · 76 FR 31800AD 2011-12-02Published 2011-06-02Effective 2011-06-02
Requires incorporating revised airspeed limitations and marking the airspeed indicator accordingly.
1 correction to this AD FAA · 2011-10-11
Correction published 2011-10-11
- Issued by
- Federal Aviation Administration
- Published
- 2011-10-11
- Document
- Federal Register 2011-26002 · Final rule; correction
The FAA is correcting an airworthiness directive (AD) that published in the Federal Register. That AD applies to Viking Air Limited Model DHC-3 (Otter) airplanes equipped with a Honeywell TPE331- 10 or -12JR turboprop engine installed per STC SA09866SC (Texas Turbines Conversions, Inc.). The wording on how the AD is justified and the wording of the temporary placard need clarification. The clarification does not affect the actions of the AD. This document makes this clarification. In all other respects, the original document remains the same.
A correction restates part of an AD that was published incorrectly. It is not an additional requirement and it does not change the AD number or its effective date.
Source: Federal Register document 2011-26002, retrieved 2026-08-17
Full official 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.