# Proposed AD FAA-2015-0681: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-04-06
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 1, 2015, 80 FR 17368
- Comments due: May 18, 2015
- Became: [AD 2016-04-06](https://openairdocs.org/ad/2016-04-06)
- Docket: FAA-2015-0681 (https://www.regulations.gov/docket/FAA-2015-0681, where comments are filed)
- Project: 2014-NM-201-AD
- FR document: 2015-07436
- Official PDF: https://openairdocs.org/files/sha256/0f/08/0f0815b358ddbbcae85ea0d838fa92d5868ca1ae527945da0526b508d42b1c1d (from https://www.govinfo.gov/content/pkg/FR-2015-04-01/pdf/2015-07436.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/04/01/2015-07436/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0C11210C5B87F97386257E1A0045DD7D.0001
- Page: https://openairdocs.org/proposed/FAA-2015-0681

## Summary

We propose to adopt a new airworthiness directive (AD) for all The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes. This proposed AD was prompted by a determination that a repetitive test is needed to inspect the components on airplanes equipped with a certain air distribution system configuration. This proposed AD would require doing repetitive testing for correct operation of the equipment cooling system and low pressure environmental control system, and corrective actions if necessary. We are proposing this AD to detect and correct latent failures of the equipment cooling system and low pressure environmental control system, which could result in smoke in the flight deck and possible loss of aircraft control.

## Notices in this docket

- Apr 1, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-07436, comments due May 18, 2015 (https://www.federalregister.gov/documents/2015/04/01/2015-07436/airworthiness-directives-the-boeing-company-airplanes)

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