Is AD 2018-07-20 a recurring Airworthiness Directive?

No — AD 2018-07-20 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2018-07-20 apply to?

AD 2018-07-20 applies to Boeing — models MD-11, MD-11F. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2018-07-20

one-time

Official AD 2018-07-20 · FR doc 2018-07638 · 2018-04-16 · airframe

Airworthiness Directives; The Boeing Company Airplanes

What this AD requires

We are superseding Airworthiness Directive (AD) 2014-03-07, which applied to certain The Boeing Company Model MD-11 and MD-11F airplanes. AD 2014-03-07 required inspecting certain locations of the wire bundles of the center upper auxiliary fuel tank for damage, and corrective action if necessary. AD 2014-03-07 also required installing nonmetallic barrier/shield sleeving, new clamps, new attaching hardware, and a new extruded channel. This AD adds certain inspections and expands the applicability. This AD was prompted by the determination that it is necessary to require an inspection of the wire bundles for damage at certain center upper auxiliary fuel tank locations on certain airplanes. We are issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2018-07-20 applies to

MakesBoeing

ModelsMD-11, MD-11F

Applies to airplanes as identified in Boeing Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016.

Whether AD 2018-07-20 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 2018-07-20 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.