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Airworthiness Directive E6-20123

recurring
AD E6-20123 · 2006-11-29 · airframe

Airworthiness Directives; Air Tractor, Inc. Model AT-602 Airplanes

What this AD requires

This document makes a correction to Airworthiness Directive (AD) 2006-23-09, which published in the Federal Register on November 9, 2006 (71 FR 65719), and applies to all Air Tractor, Inc. Model AT-602 airplanes. AD 2006-23-09 requires you to repetitively inspect (using the eddy current method) the wing center splice joint two outboard fastener holes on both of the wing main spar lower caps for fatigue cracking; repair or replace any wing main spar lower cap where fatigue cracking is found; and report any fatigue cracking found. This AD results from fatigue cracking at the wing center splice joint outboard fastener hole in one of the wing main spar lower caps. The AD number in the AD is incorrectly referenced as "2006-23-01" instead of "2006- 23-09" in two places. This document corrects these references.

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 E6-20123 applies to

MakesAir Tractor, Inc
ModelsAT-602

applicability derived from the AD summary — confirm the model/serial from the records

Whether AD E6-20123 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 E6-20123 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.