Is AD 2004-22-12 a recurring Airworthiness Directive?

No — AD 2004-22-12 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2004-22-12 apply to?

AD 2004-22-12 applies to Md Helicopters — models 600N. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2004-22-12

one-time

Official AD 2004-22-12 · FR doc 04-24228 · 2004-10-29 · airframe

Airworthiness Directives; MD Helicopters, Inc. Model 600N Helicopters

What this AD requires

This amendment adopts a new airworthiness directive (AD) for MD Helicopters, Inc. Model 600N helicopters that requires replacing the fuselage Station 75 control support bracket assembly (control support bracket), reducing the life limit, and revising the Limitations section of the applicable maintenance manual to state the reduced life limits on certain serial-numbered helicopters. This amendment is prompted by information received from the manufacturer indicating that the fatigue life of the control support bracket is shorter than the original analysis indicated. The actions specified by this AD are intended to prevent failure of the control support bracket and subsequent loss of control of the helicopter.

Which aircraft AD 2004-22-12 applies to

MakesMd Helicopters

Models600N

Serial-conditional — narrows to serials RN025–RN025, RN029–RN029, RN032–RN032, RN034–RN038, RN040–RN040, RN041–RN041, RN045–RN045, RN048–RN048, RN067–RN067.

Part-conditional — 369N2608-11.

Applies to Model 600N helicopters with the listed 'RN'-prefix serial numbers, OR to any Model 600N helicopter with a yaw stability augmentation system (YSAS) installed and a control support bracket assembly P/N 369N2608-11 installed.

Whether AD 2004-22-12 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 2004-22-12 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.