# Proposed AD 97-NM-227-AD: Boeing Model 727-200 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-23-13
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 15, 1998, 63 FR 38123
- Comments due: August 31, 1998
- Became: [AD 99-23-13](https://openairdocs.org/ad/99-23-13)
- Docket: 97-NM-227-AD
- FR document: 98-18775
- Official PDF: https://openairdocs.org/files/sha256/70/3c/703c2f8b853cbea661427c7581c5a357a0163e5f9fb40ddc24426fa47592abe6 (from https://www.govinfo.gov/content/pkg/FR-1998-07-15/pdf/98-18775.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/07/15/98-18775/airworthiness-directives-boeing-model-727-200-series-airplanes
- Page: https://openairdocs.org/proposed/97-NM-227-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all Boeing Model 727-200 series airplanes. This proposal would require repetitive inspections to detect cracks in certain areas between the upper and lower sills of the number 1 cargo door, and repair, if necessary. This proposal is prompted by reports indicating that fatigue cracks were found in certain structures adjacent to the number 1 cargo door cutout at the forward and aft doorway frames. The actions specified by the proposed AD are intended to detect and correct such fatigue cracking, which could result in rapid decompression of the fuselage and consequent reduced structural integrity of the airplane.

## Notices in this docket

- Jul 15, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-18775, comments due Aug 31, 1998 (https://www.federalregister.gov/documents/1998/07/15/98-18775/airworthiness-directives-boeing-model-727-200-series-airplanes)

---
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.