Is AD 2016-07-21 a recurring Airworthiness Directive?

No — AD 2016-07-21 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2016-07-21 apply to?

AD 2016-07-21 applies to Piper Aircraft, Inc. — models PA-28-161, PA-28-181, PA-28R-201, PA-28, PA-28R. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2016-07-21

one-time

Official AD 2016-07-21 · FR doc 2016-07580 · 2016-04-11 · airframe

Airworthiness Directives; Piper Aircraft, Inc. Airplanes

What this AD requires

We are superseding Airworthiness Directive (AD) 2015-20-13 for certain Piper Aircraft, Inc. Models PA-28-161, PA-28-181, and PA-28R- 201 airplanes. AD 2015-20-13 required inspecting the right wing rib at wing station 140.09 for cracks and taking necessary corrective action. This AD retains the actions for AD 2015-20-13 and adds airplanes to the applicability. This AD was prompted by reports that additional airplanes have been found with the same cracks. We are issuing this AD to correct the unsafe condition on these products.

Which aircraft AD 2016-07-21 applies to

MakesPiper Aircraft, Inc.

ModelsPA-28-161, PA-28-181, PA-28R-201, PA-28, PA-28R

Serial-conditional — narrows to serials 2842393–2842395, 2843769–2843775, 2843779–2843791, 2844152–2844152, 2842010–2842392, 2843021–2843768, 2844004–2844151.

Combines airplanes previously affected by AD 2015-20-13 (PA-28-161 S/Ns 2842393-2842395; PA-28-181 S/Ns 2843769-2843775 and 2843779-2843791; PA-28R-201 S/N 2844152) with serial number ranges newly added by this AD.

Whether AD 2016-07-21 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 2016-07-21 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.