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Airworthiness Directive 86-15-09

one-time
AD 86-15-09 · 1986-01-01 · airframe

Airworthiness Directives; the vertical tail, in accordance with the "Instructions" section of GROB-Werke GmbH Technical Information No. TM 817-20 dated Jan.

Which aircraft AD 86-15-09 applies to

MakesGrob-Werke Gmbh

Vertical tail repair/inspection per GROB-Werke GmbH Technical Information No. TM 817-20, dated January 29, 1986, and GROB-Werke GmbH Repair Instructions No. 817-20/1, 817-20/2, and 817-20/3, same date. Compliance with paragraph (a) may be deleted upon accomplishment of these repair instructions.

Whether AD 86-15-09 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 86-15-09 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.