# Airworthiness Directives; Boeing Model 747-100, -200B, -200F, -200C, -100B, -300, -100B SUD, -400, -400D, -400F, and 747SR Series Airplanes
> **Rule** · Final rule. · Published 2005-01-07 · Effective 2005-02-11 · 70 FR 1340
## Document
- **Document number:** 05-160
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 1340
- **Publication date:** 2005-01-07
- **Effective date:** 2005-02-11
- **FAA docket:** Docket No. FAA-2004-18601
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 747 series airplanes. This AD requires a one-time inspection for discrepancies of the frame web and inner chords on the forward edge frame of the number 5 main entry door cutout, and related corrective action. This AD is prompted by a report of cracking of the frame web and inner chords on the forward edge frame of the number 5 main entry door. We are issuing this AD to find and fix discrepancies of the frame web and inner chords, which could result in cracking, subsequent severing of the frame, and consequent rapid depressurization of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/01/07/05-160/airworthiness-directives-boeing-model-747-100--200b--200f--200c--100b--300--100b-sud--400--400d)
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