Is AD 2018-18-12 a recurring Airworthiness Directive?

No — AD 2018-18-12 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2018-18-12 apply to?

AD 2018-18-12 applies to Airbus Helicopters — models AS350B, AS350B1, AS350B2, AS350B3, AS350BA, AS350. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2018-18-12

one-time

Official AD 2018-18-12 · FR doc 2018-19431 · 2018-09-10 · airframe

Airworthiness Directives; Airbus Helicopters

What this AD requires

We are adopting a new airworthiness directive (AD) for Airbus Helicopters Model AS350B, AS350B1, AS350B2, AS350B3, and AS350BA helicopters with a Pall Aerospace Corporation inlet barrier filter (IBF) element. This AD requires revising the Rotorcraft Flight Manual Supplement to prohibit operating a helicopter with an IBF element in wet weather and replacing the IBF element if wet. This AD is prompted by a forced landing after an engine flameout. The actions of this AD are intended to address an unsafe condition on these products.

Which aircraft AD 2018-18-12 applies to

MakesAirbus Helicopters

ModelsAS350B, AS350B1, AS350B2, AS350B3, AS350BA, AS350

Part-conditional — CE01301F2, CE01301F2B.

Applies only to helicopters with a Pall Aerospace Inlet Barrier Filter element P/N CE01301F2 or CE01301F2B installed.

Whether AD 2018-18-12 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 2018-18-12 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.