Is AD 2011-09-02 a recurring Airworthiness Directive?

No — AD 2011-09-02 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2011-09-02 apply to?

AD 2011-09-02 applies to Saab — models 340A, SF340A, 340B, 340. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2011-09-02

one-time

Official AD 2011-09-02 · FR doc 2011-9279 · 2011-04-20 · airframe

Airworthiness Directives; Saab AB, Saab Aerosystems Model 340A (SAAB/SF340A) and SAAB 340B Airplanes Modified in Accordance With Supplemental Type Certificate (STC) ST00224WI-D, ST00146WI-D, or SA984GL-D

What this AD requires

We are adopting a new airworthiness directive (AD) for the products listed above. This AD requires inspecting the fuselage surface for corrosion and cracking behind the external adapter plate of the antennae installation, and repair if necessary. This AD was prompted by a report of a crack found behind the external adapter plate of the antennae during inspection. Similar cracking was found on two additional airplanes, and extensive corrosion was found on one airplane. We are issuing this AD to detect and correct corrosion and cracking behind the external adapter plate of the antennae of certain damage-tolerant structure, which could result in reduced structural integrity and consequent rapid depressurization of the airplane.

Which aircraft AD 2011-09-02 applies to

MakesSaab

Models340A, SF340A, 340B, 340

Serial-conditional — narrows to serials 004–159, 160–459.

Applies only to airplanes modified in accordance with Supplemental Type Certificate (STC) ST00224WI-D, ST00146WI-D, or SA984GL-D. Serial numbers 004 through 159 apply to Model 340A (SAAB/SF340A); serial numbers 160 through 459 apply to Model SAAB 340B.

Whether AD 2011-09-02 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 2011-09-02 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.