Summary
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.
Directive Details
AD Number
FAA-2014-0429
Document Number
2015-10069
Type
Rule
Publication Date
May 12, 2015
Effective Date
June 16, 2015
Affected Manufacturer
The Boeing Company
Criticality
important
Emergency
No
Docket ID
Docket No. FAA-2014-0429
Topics
Official Documents
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