# Proposed AD FAA-2014-0122: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2014-16-14
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 3, 2014, 79 FR 11728
- Comments due: April 17, 2014
- Became: [AD 2014-16-14](https://openairdocs.org/ad/2014-16-14)
- Docket: FAA-2014-0122 (https://www.regulations.gov/docket/FAA-2014-0122, where comments are filed)
- Project: 2014-NM-002-AD
- FR document: 2014-04500
- Official PDF: https://openairdocs.org/files/sha256/73/41/7341613e6123c4970d76758ef61fa901ea1c463e08311a382a23d14f7ac65d18 (from https://www.govinfo.gov/content/pkg/FR-2014-03-03/pdf/2014-04500.pdf)
- Federal Register: https://www.federalregister.gov/documents/2014/03/03/2014-04500/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/771F194D0071DC9786257C900055709A.0001
- Page: https://openairdocs.org/proposed/FAA-2014-0122

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 737-600, -700, -700C, -800, and -900 series airplanes. This proposed 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 proposed AD would require removing certain autothrottle computers and installing a new or reworked autothrottle computer. We are proposing 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.

## Notices in this docket

- Mar 3, 2014: Notice of proposed rulemaking (NPRM). (first notice), FR document 2014-04500, comments due Apr 17, 2014 (https://www.federalregister.gov/documents/2014/03/03/2014-04500/airworthiness-directives-the-boeing-company-airplanes)

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