# 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
> **Rule** · Final rule; correction. · Published 2009-12-23 · Effective 2009-11-05 · 74 FR 68135
## Document
- **Document number:** E9-30418
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; correction.
- **Citation:** 74 FR 68135
- **Publication date:** 2009-12-23
- **Effective date:** 2009-11-05
- **FAA docket:** Docket No. FAA-2009-0521
## Abstract

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 The error resulted in use of an outdated division name and e-mail address in the vendor contact information.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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/12/23/E9-30418/airworthiness-directives-boeing-model-737-300--400-and--500-series-airplanes-equipped-with-a-digital)
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