# Proposed AD FAA-2014-0429: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2015-09-05
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 9, 2014, 79 FR 38799
- Comments due: August 25, 2014
- Became: [AD 2015-09-05](https://openairdocs.org/ad/2015-09-05)
- Docket: FAA-2014-0429 (https://www.regulations.gov/docket/FAA-2014-0429, where comments are filed)
- Project: 2014-NM-039-AD
- FR document: 2014-16008
- Official PDF: https://openairdocs.org/files/sha256/d3/3b/d33b7a36388d5bbc13838fa9c8ddb11a0fb87433b9f6136b320db2f179aafe1b (from https://www.govinfo.gov/content/pkg/FR-2014-07-09/pdf/2014-16008.pdf)
- Federal Register: https://www.federalregister.gov/documents/2014/07/09/2014-16008/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F312AD77C1B3D09F86257D10005D75CF.0001
- Page: https://openairdocs.org/proposed/FAA-2014-0429

## Summary

We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 747-400 and 747-400F series airplanes. This proposed AD was prompted by reports of cracking in the main equipment center (MEC) drip shield and exhaust plenum. This proposed AD would require installing a fiberglass reinforcing overcoat on the MEC drip shield. We are proposing this AD to prevent water penetration into the MEC, which could result in an electrical short and potential loss of several functions essential for safe flight.

## Notices in this docket

- Jul 9, 2014: Notice of proposed rulemaking (NPRM). (first notice), FR document 2014-16008, comments due Aug 25, 2014 (https://www.federalregister.gov/documents/2014/07/09/2014-16008/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.