Airworthiness Directives; Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747SP, and 747SR Series Airplanes
airworthiness · Rule · Final rule; request for comments. · Published 2004-12-09 · Effective 2004-12-27 · 69 FR 71349
Document
Document number
04-26793
Federal Register citation
69 FR 71349
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Publication date
2004-12-09
Effective date
2004-12-27
FAA docket
Docket No. FAA-2004-19811
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747- 200C, 747-200F, 747-300, 747SP, and 747SR series airplanes. This AD requires repetitive inspections to detect cracks and fractures of the strut front spar chord assembly at each strut location, and repair if necessary. This AD is prompted by a report of a fractured front spar chord assembly for strut No. 3, which resulted in the loss of the strut upper link load path. We are issuing this AD to prevent loss of the strut upper link load path and consequent fracture of the diagonal brace, which could result in in-flight separation of the strut and engine from the airplane.