Is AD 59-06-04 a recurring Airworthiness Directive?

No — AD 59-06-04 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 59-06-04

Q: Which aircraft does AD 59-06-04 apply to?

AD 59-06-04 applies to Sierra Hotel Aero, Inc. — models Navion (Army L-17A), Navion A (Army L-17B and L-17C), Navion B, Navion D, Navion. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 59-06-04 · 1959-01-01 · airframe

Airworthiness Directives; 79 dated December 23, 1958, covers this same subject.) FOOTER: Sierra Hotel Aero, Inc. Navion (Army L-17A) Navion A (Army L-17B an

Which aircraft AD 59-06-04 applies to

MakesSierra Hotel Aero, Inc.

ModelsNavion (Army L-17A), Navion A (Army L-17B and L-17C), Navion B, Navion D, Navion

References an earlier bulletin (No. 79, dated December 23, 1958) covering the same subject; source text truncated, substantive requirement and effective date not captured.

Whether AD 59-06-04 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 59-06-04 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 →

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.