# Proposed AD FAA-2018-0276: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-16-06
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 17, 2018, 83 FR 16796
- Comments due: June 1, 2018
- Became: [AD 2018-16-06](https://openairdocs.org/ad/2018-16-06)
- Docket: FAA-2018-0276 (https://www.regulations.gov/docket/FAA-2018-0276, where comments are filed)
- FR document: 2018-07750
- Official PDF: https://openairdocs.org/files/sha256/88/4e/884e73c1b379a69cedfcd09e97b0960a640bcd558f72a8e9a0eb0bca001e6732 (from https://www.govinfo.gov/content/pkg/FR-2018-04-17/pdf/2018-07750.pdf)
- Federal Register: https://www.federalregister.gov/documents/2018/04/17/2018-07750/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/64DB5C23EAC4A69286258272004B6C14.0001
- Page: https://openairdocs.org/proposed/FAA-2018-0276

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 747-100, -100B, -100B SUD, -200B, - 200C, -200F, -300, -400, -400D, 747SP, and 747SR, and 747-8 series airplanes. This proposed AD was prompted by reports indicating that additional areas of Boeing Material Specification (BMS) 8-39 flexible urethane foam were found during an inspection required by a related AD. This proposed AD would require inspecting for BMS 8-39 flexible urethane foam insulation in the floor panel assemblies and the power drive unit (PDU) cover assemblies; doing applicable on-condition actions; modifying certain dripshields; and replacing BMS 8-39 foam strips on certain dripshields with BMS 8-371 foam strips. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Apr 17, 2018: Notice of proposed rulemaking (NPRM). (first notice), FR document 2018-07750, comments due Jun 1, 2018 (https://www.federalregister.gov/documents/2018/04/17/2018-07750/airworthiness-directives-the-boeing-company-airplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.