Airworthiness Directives; Boeing Model 747-100, 747-100B, 747-200B, 747-200C, 747-200F, 747-300, 747SR, and 747SP Series Airplanes
airworthiness · Rule · Final rule. · Published 2007-07-30 · Effective 2007-09-04 · 72 FR 41433
Document
Document number
E7-14140
Federal Register citation
72 FR 41433
Type
Rule
Action
Final rule.
Category
airworthiness
Publication date
2007-07-30
Effective date
2007-09-04
FAA docket
Docket No. FAA-2007-27359
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 747-100, 747-100B, 747-200B, 747-200C, 747-200F, 747-300, 747SR, and 747SP series airplanes. This AD requires repetitive high frequency eddy current inspections for cracks of the fuselage skin at stringer 5 left and right between stations 340 and 350, and corrective actions if necessary. This AD results from reports of fatigue cracks in the fuselage skin near stringer 5 between stations 340 and 350. We are issuing this AD to detect and correct fatigue cracking of the fuselage skin near stringer 5. Cracks in this area could join together and result in in-flight depressurization of the airplane.