# Proposed AD FAA-2017-0553: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-07-19
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 12, 2017, 82 FR 26872
- Comments due: July 27, 2017
- Became: [AD 2018-07-19](https://openairdocs.org/ad/2018-07-19)
- Docket: FAA-2017-0553 (https://www.regulations.gov/docket/FAA-2017-0553, where comments are filed)
- Project: 2016-NM-208-AD
- FR document: 2017-12058
- Official PDF: https://openairdocs.org/files/sha256/bf/1d/bf1dcf86ba81e635f8529fbe064a63ebbb7a759280b5a2e1eae687ca5619708e (from https://www.govinfo.gov/content/pkg/FR-2017-06-12/pdf/2017-12058.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/06/12/2017-12058/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8FF8D5B62DFBB6348625813D00507E5A.0001
- Page: https://openairdocs.org/proposed/FAA-2017-0553

## Summary

We propose to adopt a new airworthiness directive (AD) for all The Boeing Company Model 787-8 and 787-9 airplanes. This proposed AD was prompted by a report that the Parking Brake and Alternate Pitch Trim Module (PBM) may unintentionally disengage, fail to set, fail to release, or become jammed. This proposed AD would require replacing the PBM and doing a PBM installation test. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 12, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-12058, comments due Jul 27, 2017 (https://www.federalregister.gov/documents/2017/06/12/2017-12058/airworthiness-directives-the-boeing-company-airplanes)

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