Is AD 2018-02-01 a recurring Airworthiness Directive?

Yes — AD 2018-02-01 requires a repetitive inspection every 75 hours. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2018-02-01 apply to?

AD 2018-02-01 applies to Enstrom — models F-28A, F-28C, F-28C-2, F-28C-2R, 280C, F-28F, F-28F-R, 280F. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2018-02-01

recurring

Official AD 2018-02-01 · FR doc 2018-00659 · 2018-01-17 · airframe

Airworthiness Directives; The Enstrom Helicopter Corporation Helicopters

What this AD requires

We are superseding Airworthiness Directive (AD) 2015-08-51 for the Enstrom Helicopter Corporation (Enstrom) Model F-28A, 280, F-28C, F-28C-2, F-28C-2R, 280C, F-28F, F-28F-R, 280F, 280FX, and 480 helicopters. AD 2015-08-51 required an inspection of the main rotor spindle (spindle) and reporting the inspection results to the FAA. This new AD was prompted by additional reports of cracked spindles and requires establishing a life limit and a recurring inspection. The actions of this AD are intended to prevent the unsafe condition on these products.

Repetitive inspection. Re-inspect every 75 hours. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2018-02-01 applies to

MakesEnstrom

ModelsF-28A, F-28C, F-28C-2, F-28C-2R, 280C, F-28F, F-28F-R, 280F, 280FX, F-28, 280, 480

Serial-conditional — narrows to serials 5001–5006.

Part-conditional — 28-14282-11, 28-14282-13.

Applies to F-28/280-family models (all serial numbers) and Model 480 helicopters (S/N 5001 through 5006 only), each with a main rotor spindle P/N 28-14282-11 or 28-14282-13 installed.

Whether AD 2018-02-01 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 2018-02-01 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.