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Airworthiness Directive E9-30418

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AD E9-30418 · 2009-12-23 · airframe

Airworthiness Directives; Boeing Model 737-300, -400, and -500 Series Airplanes Equipped With a Digital Transient Suppression Device (DTSD) Installed in Accordance With Supplemental Type Certificate (STC) ST00127BO

What this AD requires

The FAA is correcting information in an existing airworthiness directive (AD) that was published in the Federal Register on October 1, 2009. The error resulted in use of an outdated division name and e-mail address in the vendor contact information. This AD applies to certain Boeing Model 737-300, -400, and -500 series airplanes. This AD requires revising the maintenance program to include new fuel system limitations for airplanes modified in accordance with STC ST00127BO. This AD also requires inspections and checks of the DTSDs and corrective actions, if necessary.

Which aircraft AD E9-30418 applies to

MakesBoeing
Models737-300, 737-400, 737-500, 737

Applies only to airplanes modified in accordance with STC ST00127BO, requiring new fuel system limitations and inspection/checks of digital transient suppression devices (DTSDs); this document is a correction to AD 2009-20-11 updating vendor contact information only, not the applicability itself.

Whether AD E9-30418 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 E9-30418 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.