# Airworthiness Directives; Boeing Model 737-100, -200, -300, -400, and -500 Series Airplanes
> **Rule** · Final rule. · Published 1997-06-27 · Effective 1997-08-01 · 62 FR 34623
## Document
- **Document number:** 97-16853
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 62 FR 34623
- **Publication date:** 1997-06-27
- **Effective date:** 1997-08-01
- **FAA docket:** Docket No. 97-NM-28-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to all Boeing Model 737-100, -200, -300, -400, and -500 series airplanes, that requires installation of a newly designed rudder-limiting device and yaw damper system. This amendment 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 this 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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1997/06/27/97-16853/airworthiness-directives-boeing-model-737-100--200--300--400-and--500-series-airplanes)
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