# Proposed AD 97-NM-28-AD: Boeing Model 737-100, -200, -300, -400, and -500 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 97-14-03
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 14, 1997, 62 FR 12121
- Comments due: April 23, 1997
- Became: [AD 97-14-03](https://openairdocs.org/ad/97-14-03)
- Docket: 97-NM-28-AD
- FR document: 97-6436
- Official PDF: https://openairdocs.org/files/sha256/ab/ca/abca779eaa786a42b32cc12553570afbd87e0e8a374abbf85a6d4b98605d9cde (from https://www.govinfo.gov/content/pkg/FR-1997-03-14/pdf/97-6436.pdf)
- Federal Register: https://www.federalregister.gov/documents/1997/03/14/97-6436/airworthiness-directives-boeing-model-737-100--200--300--400-and--500-series-airplanes
- Page: https://openairdocs.org/proposed/97-NM-28-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all Boeing Model 737-100, -200, - 300, -400, and -500 series airplanes. This proposal would require installation of a newly designed rudder-limiting device and yaw damper system. This proposal is prompted by a report indicating that a full rudder input, either commanded or uncommanded, could result in a rapid roll upset; and by reports of malfunctions of the yaw damper system. The actions specified by the proposed AD are intended to prevent excessive rudder authority and consequent reduced controllability of the airplane; and malfunctions of the yaw damper system, which could result in sudden uncommanded yawing of the airplane and consequent injury to passengers and crewmembers.

## Notices in this docket

- Mar 14, 1997: Notice of proposed rulemaking (NPRM). (first notice), FR document 97-6436, comments due Apr 23, 1997 (https://www.federalregister.gov/documents/1997/03/14/97-6436/airworthiness-directives-boeing-model-737-100--200--300--400-and--500-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.