Is AD 68-20-06 a recurring Airworthiness Directive?

No — AD 68-20-06 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 68-20-06

Q: Which aircraft does AD 68-20-06 apply to?

AD 68-20-06 applies to Sierra Hotel Aero, Inc. — models Navion A (Army L-17B and L-17C), Navion B, Navion D, Navion E, Navion F, Navion G, Navion H, Navion (Army L-17A). Serial/part conditions may narrow it to specific aircraft.

one-time

AD 68-20-06 · 1968-01-01 · airframe

Airworthiness Directives; part number or Federal Aviation Administration approved equivalent part before further flight. This amendment becomes effective Oc

Which aircraft AD 68-20-06 applies to

MakesSierra Hotel Aero, Inc.

ModelsNavion A (Army L-17B and L-17C), Navion B, Navion D, Navion E, Navion F, Navion G, Navion H, Navion (Army L-17A), Navion

Requires installation of the specified part number or an FAA-approved equivalent before further flight (part identity cut off at start of source text). Effective October 3, 1968.

Whether AD 68-20-06 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 68-20-06 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.