Is AD 2019-05-04 a recurring Airworthiness Directive?

No — AD 2019-05-04 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2019-05-04 apply to?

AD 2019-05-04 applies to Md Helicopters, Inc. — models 369A, 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2019-05-04

one-time

Official AD 2019-05-04 · FR doc 2019-04528 · 2019-03-13 · airframe

Airworthiness Directives; MD Helicopters, Inc. (MDHI), Helicopters

What this AD requires

We are adopting a new airworthiness directive (AD) for MDHI Model 369A, 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This AD requires inspecting each main rotor blade (MRB) for a crack. This AD was prompted by reports of cracked MRBs. The actions of this AD are intended to address an unsafe condition on these helicopters.

Which aircraft AD 2019-05-04 applies to

MakesMd Helicopters, Inc.

Models369A, 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 369, 500N, 600N

Part-conditional — 369A1100, 369D21100, 369D21102, 369D21120, 369D21121, 369D21123, 500P2100, 500P2300.

Applies only to helicopters with a main rotor blade (MRB) P/N 369A1100, 369D21100, 369D21102, 369D21120, 369D21121, 369D21123, 500P2100, or 500P2300 (all dash numbers) installed.

Whether AD 2019-05-04 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 2019-05-04 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.