Is AD 2018-26-04 a recurring Airworthiness Directive?

No — AD 2018-26-04 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2018-26-04 apply to?

AD 2018-26-04 applies to Airbus Sas — models A350-941, A350-1041, A350. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2018-26-04

one-time

Official AD 2018-26-04 · FR doc 2018-28067 · 2018-12-28 · airframe

Airworthiness Directives; Airbus SAS Airplanes

What this AD requires

We are adopting a new airworthiness directive (AD) for certain Airbus SAS Model A350-941 and -1041 airplanes. This AD was prompted by a report that due to an issue with the flight warning system (FWS) logic, it is possible that the "AIR Auxiliary Power Unit (APU) BLEED LEAK" electronic centralized aircraft monitoring (ECAM) alert can trigger several times. This AD requires revising the airplane flight manual (AFM) to incorporate procedures related to an APU bleed leak. We are issuing this AD to address the unsafe condition on these products.

Which aircraft AD 2018-26-04 applies to

MakesAirbus Sas

ModelsA350-941, A350-1041, A350

Applies to airplanes identified in EASA AD 2018-0246, dated November 13, 2018.

Whether AD 2018-26-04 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 2018-26-04 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.