# Proposed AD FAA-2015-7531: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-25-21
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 29, 2015, 80 FR 81220
- Comments due: February 12, 2016
- Became: [AD 2016-25-21](https://openairdocs.org/ad/2016-25-21)
- Docket: FAA-2015-7531 (https://www.regulations.gov/docket/FAA-2015-7531, where comments are filed)
- Project: 2015-NM-052-AD
- FR document: 2015-32548
- Official PDF: https://openairdocs.org/files/sha256/e8/11/e811e564e4a148de4ba9328716e629ebedffce726c58cf73043836ee96b798a2 (from https://www.govinfo.gov/content/pkg/FR-2015-12-29/pdf/2015-32548.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/12/29/2015-32548/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/789D8CD5D42A8C7386257F2A00583255.0001
- Page: https://openairdocs.org/proposed/FAA-2015-7531

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 787-8 airplanes. This proposed AD was prompted by reports of electrical shorts of the motor stator wiring burning a hole through the housing of the motor of the cabin air compressor (CAC). This proposed AD would require installing modified inboard and outboard CAC modules on the left side and right side cabin air conditioning and temperature control system (CACTCS) packs. We are proposing this AD to prevent an electrical short from burning through the housing of the motor of the CAC, which could result in a fire in the pack bay, and consequent reduced controllability of the airplane.

## Notices in this docket

- Dec 29, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-32548, comments due Feb 12, 2016 (https://www.federalregister.gov/documents/2015/12/29/2015-32548/airworthiness-directives-the-boeing-company-airplanes)

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