# Airworthiness Directives; Boeing Model 737 Airplanes
> **Rule** · Final rule. · Published 2005-12-16 · Effective 2006-01-20 · 70 FR 74647
## Document
- **Document number:** 05-24151
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 737
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 74647
- **Publication date:** 2005-12-16
- **Effective date:** 2006-01-20
- **FAA docket:** Docket No. FAA-2005-21712
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 737 airplanes. This AD requires modifying the elevator input torque tube assembly. This AD results from a report of a restriction in the pilot's elevator input control system. A design review performed on the elevator input torque tube assembly in the course of the investigation discovered possible failure modes that could lead to a jam of the elevator control system. We are issuing this AD to prevent loss of elevator control and consequent reduced controllability of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/12/16/05-24151/airworthiness-directives-boeing-model-737-airplanes)
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