# Proposed AD 2001-NM-34-AD: Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200F, 747-300, 747SP, and 747SR Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2002-18-04
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 2, 2002, 67 FR 38
- Comments due: February 19, 2002
- Became: [AD 2002-18-04](https://openairdocs.org/ad/2002-18-04)
- Docket: 2001-NM-34-AD
- FR document: 01-32196
- Official PDF: https://openairdocs.org/files/sha256/21/11/2111fd8ea2ca6add1d01a50acca0dff649403f6641836fbdd3faa2f986317374 (from https://www.govinfo.gov/content/pkg/FR-2002-01-02/pdf/01-32196.pdf)
- Federal Register: https://www.federalregister.gov/documents/2002/01/02/01-32196/airworthiness-directives-boeing-model-747-100-747-100b-747-100b-sud-747-200b-747-200f-747-300-747sp
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/14A288AF0E999CA186256B36005EAD4A.0001
- Page: https://openairdocs.org/proposed/2001-NM-34-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200F, 747-300, 747SP, and 747SR series airplanes. This proposal would require one-time inspections for cracking in certain upper deck floor beams and follow-on actions. This action is necessary to find and fix cracking in certain upper deck floor beams. Such cracking could extend and sever floor beams adjacent to the body frame and result in rapid depressurization of the airplane. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Jan 2, 2002: Notice of proposed rulemaking (NPRM). (first notice), FR document 01-32196, comments due Feb 19, 2002 (https://www.federalregister.gov/documents/2002/01/02/01-32196/airworthiness-directives-boeing-model-747-100-747-100b-747-100b-sud-747-200b-747-200f-747-300-747sp)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.