Is AD 2018-09-04 a recurring Airworthiness Directive?

No — AD 2018-09-04 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2018-09-04 apply to?

AD 2018-09-04 applies to Gulfstream Aerospace Corporation — models G-IV, GIV-X. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2018-09-04

one-time

Official AD 2018-09-04 · FR doc 2018-08956 · 2018-05-07 · airframe

Airworthiness Directives; Gulfstream Aerospace Corporation Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for certain Gulfstream Aerospace Corporation Models G-IV and GIV-X airplanes. This AD was prompted by the potential for fatigue cracks developing in the main landing gear actuator attachment fitting that had a certain repair incorporated. This AD requires incorporating new revisions into the Instructions for Continued Airworthiness of the Limitations section of the FAA-approved maintenance program (e.g., maintenance manual) that establish an inspection cycle for the repaired MLG side brace actuator fittings. We are issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2018-09-04 applies to

MakesGulfstream Aerospace Corporation

ModelsG-IV, GIV-X

Serial-conditional — narrows to serials 1000–1399, 1400–1535, 4001–4355.

Model G-IV S/Ns 1000 through 1399 must have Aircraft Service Change (ASC) 416A (MSG-3) incorporated to be affected.

Whether AD 2018-09-04 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 2018-09-04 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.