Is AD 2018-23-03 a recurring Airworthiness Directive?

No — AD 2018-23-03 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2018-23-03 apply to?

AD 2018-23-03 applies to Airbus — models A318-111, A318-112, A318-121, A318-122, A319-111, A319-112, A319-113, A319-114. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2018-23-03

one-time

Official AD 2018-23-03 · FR doc 2018-24394 · 2018-11-09 · airframe

Airworthiness Directives; Airbus SAS Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for certain Airbus SAS Model A318 and A319 series airplanes; Model A320-211, -212, -214, -231, -232, and -233 airplanes; and Model A321-111, -112, -131, - 211, -212, -213, -231, and -232 airplanes. This AD was prompted by reports of false resolution advisories (RAs) from certain traffic collision avoidance systems (TCASs). This AD requires modification or replacement of certain TCAS processors. We are issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2018-23-03 applies to

MakesAirbus

ModelsA318-111, A318-112, A318-121, A318-122, A319-111, A319-112, A319-113, A319-114, A319-115, A319-131, A319-132, A319-133, A320-211, A320-212, A320-214, A320-231, A320-232, A320-233, A321-111, A321-112, A321-131, A321-211, A321-212, A321-213, A321-231, A321-232, A318, A319, A320, A321

Part-conditional — ST03708NY, ST03835NY.

Applies only if modified by H4 Aerospace Supplemental Type Certificate (STC) ST03708NY or PMV Engineering STC ST03835NY.

Whether AD 2018-23-03 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 2018-23-03 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.