# Proposed AD FAA-2016-9432: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2017-12-07
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 5, 2016, 81 FR 87494
- Comments due: January 19, 2017
- Became: [AD 2017-12-07](https://openairdocs.org/ad/2017-12-07)
- Docket: FAA-2016-9432 (https://www.regulations.gov/docket/FAA-2016-9432, where comments are filed)
- Project: 2016-NM-116-AD
- FR document: 2016-28631
- Official PDF: https://openairdocs.org/files/sha256/80/69/80694740d2d23a7a0b6c8a5c255580c7fccb155d9d19742715cf9d00982cd2da (from https://www.govinfo.gov/content/pkg/FR-2016-12-05/pdf/2016-28631.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/12/05/2016-28631/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C15002D713CE431686258080006694AB.0001
- Page: https://openairdocs.org/proposed/FAA-2016-9432

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 737-800, -900, and -900ER series airplanes. This proposed AD was prompted by reports indicating in- flight valve failure of the left temperature control valve and control cabin trim air modulating valve. This proposed AD would require replacing the left temperature control valve and control cabin trim air modulating valve. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Dec 5, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-28631, comments due Jan 19, 2017 (https://www.federalregister.gov/documents/2016/12/05/2016-28631/airworthiness-directives-the-boeing-company-airplanes)

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