# Proposed AD 98-NM-243-AD: Boeing Model 777-200 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-14-05
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 14, 1998, 63 FR 55065
- Comments due: November 30, 1998
- Became: [AD 99-14-05](https://openairdocs.org/ad/99-14-05)
- Docket: 98-NM-243-AD
- FR document: 98-27481
- Official PDF: https://openairdocs.org/files/sha256/6f/d3/6fd3ecc422e2a193c28a98615825b7f3d80c7eb793ecc676d690e45cbfbface0 (from https://www.govinfo.gov/content/pkg/FR-1998-10-14/pdf/98-27481.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/10/14/98-27481/airworthiness-directives-boeing-model-777-200-series-airplanes
- Page: https://openairdocs.org/proposed/98-NM-243-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 777-200 series airplanes. This proposal would require inspections to verify correct installation of certain fasteners located on the trailing edges of the horizontal and vertical stabilizer; replacement of the existing fasteners with new fasteners installed with wet sealant; and follow-on actions, if necessary. This proposal is prompted by reports indicating that, during manufacture of the horizontal and vertical stabilizers, certain fasteners attaching the aluminum ribs and brackets to the trailing edges on the empennage were not correctly installed with wet sealant. The actions specified by the proposed AD are intended to prevent corrosion and possible cracking of those aluminum parts, which could result in loss of the attachment of the elevator and rudder to the empennage and consequent reduced controllability of the airplane.

## Notices in this docket

- Oct 14, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-27481, comments due Nov 30, 1998 (https://www.federalregister.gov/documents/1998/10/14/98-27481/airworthiness-directives-boeing-model-777-200-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.