Airworthiness Directive · Amendment 39-8977 · The Boeing Company Airplanes
The Boeing Company Airplanes
Superseded. A later AD replaced this one: AD 2008-16-14. Comply with the one in force.
This AD applies to The Boeing Company 747 Series (all).
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment supersedes an existing airworthiness directive (AD), applicable to certain Boeing Model 747 series airplanes, that currently requires inspecting to detect cracking in certain lower lobe lap joints, and repair, if necessary; reporting any findings of discrepancies; replacing certain countersunk fasteners with protruding head fasteners; and verifying that the airplanes do not have certain countersunk fasteners. This amendment requires inspection of an expanded area, deletion of the reporting requirement, and expansion of the applicability to include additional airplanes. This amendment is prompted by reports of cracking of the fuselage skin in certain areas and findings of additional countersunk fasteners. The actions specified by this AD are intended to prevent reduced structural integrity of the fuselage.
