Airworthiness Directives; The Boeing Company Airplanes
airworthiness · Rule · Final rule. · Published 2020-03-09 · Effective 2020-04-13 · 85 FR 13477
Document
Document number
2020-04728
Federal Register citation
85 FR 13477
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
The Boeing Company
Publication date
2020-03-09
Effective date
2020-04-13
FAA docket
Docket No. FAA-2019-0875
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 747-400 series airplanes. This AD was prompted by a report of a certain modification that causes interference with inspections that are intended to detect fatigue cracks. This AD requires repetitive low frequency eddy current (LFEC) inspections of a certain fuselage upper skin lap splice for cracks, repetitive high frequency eddy current (HFEC) inspections of a certain fuselage upper skin lap splice for cracks, and applicable on-condition actions. The FAA is issuing this AD to address the unsafe condition on these products.