Is AD 2018-07-04 a recurring Airworthiness Directive?

No — AD 2018-07-04 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2018-07-04 apply to?

AD 2018-07-04 applies to The Boeing Company — models DC-9-81, DC-9-82, DC-9-83, DC-9-87, MD-88, MD-90-30, DC-9, MD-90. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2018-07-04

one-time

Official AD 2018-07-04 · FR doc 2018-16320 · 2018-08-06 · airframe

Airworthiness Directives; the Boeing Company Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for all The Boeing Company Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), and DC-9-87 (MD-87) airplanes, Model MD-88 airplanes, and Model MD-90- 30 airplanes. This AD was prompted by a report of loss of airspeed indication due to icing. This AD requires modifying the air data heat (ADH) system. We are issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2018-07-04 applies to

MakesThe Boeing Company

ModelsDC-9-81, DC-9-82, DC-9-83, DC-9-87, MD-88, MD-90-30, DC-9, MD-90

DC-9-81, DC-9-82, DC-9-83, and DC-9-87 are also known by marketing designations MD-81, MD-82, MD-83, and MD-87, respectively.

Whether AD 2018-07-04 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 2018-07-04 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 →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.