# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2014-08-19 · Effective 2014-09-23 · 79 FR 48962
## Document
- **Document number:** 2014-19014
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 79 FR 48962
- **Publication date:** 2014-08-19
- **Effective date:** 2014-09-23
- **FAA docket:** Docket No. FAA-2014-0122
## Abstract

We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-600, -700, -700C, -800, and -900 series airplanes. This AD was prompted by reports in which a single, undetected, erroneous radio altimeter output caused the autothrottle to enter landing flare retard mode prematurely on approach. This AD requires removing certain autothrottle computers and installing a new or reworked autothrottle computer. We are issuing this AD to prevent a single, undetected, erroneous radio altimeter output from causing premature autothrottle landing flare retard and subsequent loss of automatic speed control, which could result in loss of control of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2014/08/19/2014-19014/airworthiness-directives-the-boeing-company-airplanes)
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