# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2015-05-12 · Effective 2015-06-16 · 80 FR 27074
## Document
- **Document number:** 2015-10069
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 80 FR 27074
- **Publication date:** 2015-05-12
- **Effective date:** 2015-06-16
- **FAA docket:** Docket No. FAA-2014-0429
## Abstract

We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 747-400 and 747-400F series airplanes. This AD was prompted by reports of cracking in the main equipment center (MEC) drip shield and exhaust plenum. This AD requires installing a fiberglass reinforcing overcoat on the MEC drip shield. We are issuing 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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2015/05/12/2015-10069/airworthiness-directives-the-boeing-company-airplanes)
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