Is AD 2003-21-01 a recurring Airworthiness Directive?

Yes — AD 2003-21-01 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Airworthiness Directive 2003-21-01

Q: Which aircraft does AD 2003-21-01 apply to?

AD 2003-21-01 applies to Univair, Alon, Erco, Forney, Mooney — models Alon A-2, Alon A2-A, ERCO 415-C, ERCO 415-CD, ERCO 415-D, ERCO 415-E, ERCO 415-G, Forney F-1. Serial/part conditions may narrow it to specific aircraft.

recurring

Official AD 2003-21-01 · FR doc 03-25699 · 2003-10-14 · airframe

Airworthiness Directives; Univair Aircraft Corporation Models Alon A-2 and A2-A; ERCO 415-C, 415-CD, 415-D, 415-E, and 415-G; Forney F-1 and F-1A; and Mooney M10 Airplanes

What this AD requires

The FAA supersedes Airworthiness Directive (AD) 94-18-04 R1, which currently applies to all Univair Aircraft Corporation (Univair) Models Alon A-2 and A2-A; ERCO 415-C, 415-CD, 415-D, 415-E, and 415-G; Forney F-1 and F-1A; and Mooney M10 airplanes. AD 94-18-04 R1 requires installing inspection openings in the outer wing panels, inspecting (one-time) the wing outer panel structural components for corrosion, and repairing any corroded wing outer panel structural component. Several reports of corrosion in the outer wing panels of the affected airplanes prompted that AD. This AD is the result of additional reports of corrosion on airplanes in compliance with AD 94- 18-04 R1. This AD makes the inspection required in AD 94-18-04 R1 repetitive. We are issuing this AD to prevent wing damage caused by a corroded wing outer panel structural component, which, if not detected and corrected, could progress to the point of structural failure.

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

Which aircraft AD 2003-21-01 applies to

MakesUnivair Alon Erco Forney Mooney

ModelsAlon A-2, Alon A2-A, ERCO 415-C, ERCO 415-CD, ERCO 415-D, ERCO 415-E, ERCO 415-G, Forney F-1, Forney F-1A, Mooney M10

Whether AD 2003-21-01 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 2003-21-01 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.