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Airworthiness Directive 2020-19-06

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Official AD 2020-19-06 · FR doc 2020-21440 · 2020-09-29 · appliance

Airworthiness Directives; McCauley Propeller Systems

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for certain model McCauley Propeller Systems (McCauley) governors installed on airplanes. This AD was prompted by reports of an unapproved variant McCauley idler gear bearing, part number (P/N) A-20028, that could be installed in the affected governors. This AD requires replacing the governor with a governor that is eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2020-19-06 applies to

MakesMccauley Propeller Systems
Serial-conditional — narrows to serials 170061–180501.

Applies to governor models listed in table 2 of McCauley Alert Service Bulletin ASB273C (dated January 30, 2019): (1) S/N 170061 through 180501, excluding S/Ns listed in table 1 of ASB273C; or (2) any S/N with an installation date after January 31, 2017, or an installation date that cannot be determined. Installed on airplanes certificated in any category.

Whether AD 2020-19-06 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 2020-19-06 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 →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.