Is AD 2011-12-02 a recurring Airworthiness Directive?

No — AD 2011-12-02 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2011-12-02 apply to?

AD 2011-12-02 applies to Viking Aircraft Limited — models DHC-3. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2011-12-02

one-time

Official AD 2011-12-02 · FR doc 2011-13532 · 2011-06-02 · airframe

Airworthiness Directives; Viking Air Limited Model DHC-3 (Otter) Airplanes

What this AD requires

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.

Which aircraft AD 2011-12-02 applies to

MakesViking Aircraft Limited

ModelsDHC-3

Applies only to DHC-3 (Otter) airplanes equipped with a Honeywell TPE331-10 or -12JR turboprop engine installed per Supplemental Type Certificate (STC) SA09866SC (Texas Turbines Conversions, Inc.), certificated in any category.

Whether AD 2011-12-02 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.

Date — When the work was done.

Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.

Signature & certificate — The A&P/IA who returned it to service, with certificate number.

Is AD 2011-12-02 complied with on your aircraft?

Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.

Look up a tail number →Read the full directive (Federal Register)

Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.