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Airworthiness Directive

AD 2011-12-02 76 FR 31800 Active

Federal Aviation Administration · 14 CFR part 39

Requires incorporating revised airspeed limitations and marking the airspeed indicator accordingly.

Federal Register (opens in a new tab)FAA DRS (opens in a new tab)

FR document
2011-13532
Amendment
39-16709
Published
2011-06-02
Effective
2011-06-02
Models covered
2

Last live check: 2026-08-19

Printed from https://aircraftdirectives.com/ad/2011-12-02 · AircraftDirectives restates official FAA and manufacturer records; the official sources named on this sheet control. Not an airworthiness determination.

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AD

2011-12-02

FR doc 2011-13532 · 76 FR 31800

AD 2011-12-02Published 2011-06-02Effective 2011-06-02

FAA rule - 14 CFR 39

FAA rule. Compliance with an applicable AD is required under 14 CFR 39.7. Check its effective date, applicability, compliance times and current status.

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

Read this correction on Federal Register (opens in a new tab)
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.

More directives for Honeywell TPE331

  1. AD 2018-22-01 Airworthiness Directives; Honeywell International Inc. Turboprop Engines Effective 2018-12-10
  2. AD 2018-17-15 Airworthiness Directives; Honeywell International Inc. Turboprop and Tur... Effective 2018-10-22
  3. AD 2018-13-05 Airworthiness Directives; Honeywell International Inc. Turboprop and Tur... Effective 2018-07-26
  4. AD 2018-02-14 Airworthiness Directives; Honeywell International Inc. Turboprop and Tur... Effective 2018-02-28
  5. AD 2016-21-07 Airworthiness Directives; Honeywell International Inc. Turboprop Engines Effective 2016-11-28

All Honeywell TPE331 directives

View on Federal Register (opens in a new tab) View this AD in FAA DRS (opens in a new tab) Print AD packet (opens the full Federal Register document in a new tab)

Applies to 2 models in our index