Is AD 78-01-09 R2 a recurring Airworthiness Directive?

No — AD 78-01-09 R2 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 78-01-09 R2 apply to?

AD 78-01-09 R2 applies to Short Brothers Limited — models SD3-30, SD3. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 78-01-09 R2

one-time

AD 78-01-09 R2 · 1978-01-01 · airframe

Airworthiness Directives; SHORT BROTHERS LIMITED Model SD3-30 Airplanes

Which aircraft AD 78-01-09 R2 applies to

MakesShort Brothers Limited

ModelsSD3-30, SD3

Serial-conditional — narrows to serials SH 3002–SH 3002, SH 3004–SH 3007, SH 3009–SH 3011.

Certificated in all categories. To prevent inability to inflate de-icing boots of the pneumatic deicing system on the empennage caused by water freezing in system plumbing.

Whether AD 78-01-09 R2 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 78-01-09 R2 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.

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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.