Is AD 2016-25-28 a recurring Airworthiness Directive?

No — AD 2016-25-28 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2016-25-28 apply to?

AD 2016-25-28 applies to Airbus Helicopters — models AS355NP, AS355. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2016-25-28

one-time

Official AD 2016-25-28 · FR doc 2016-30116 · 2016-12-27 · airframe

Airworthiness Directives; Airbus Helicopters

What this AD requires

We are adopting a new airworthiness directive (AD) for Airbus Helicopters Model AS355NP helicopters. This AD requires removing and installing the fire extinguishing system pipes. This AD is prompted by the discovery that the left-hand and right-hand fire extinguishing discharge systems were incorrectly connected. The actions of this AD are intended to correct the unsafe condition on these products.

Which aircraft AD 2016-25-28 applies to

MakesAirbus Helicopters

ModelsAS355NP, AS355

Applies to helicopters with an Arrius 1A1 fire extinguishing system installed.

Whether AD 2016-25-28 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 2016-25-28 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.