Airworthiness Directive · Amendment 39-10064 · Boeing Model 747 Series Airplanes, Excluding Airplanes Equipped With Pratt & Whitney PW4000 and General Electric CF6-80C2 Series Engines
Boeing Model 747 Series Airplanes, Excluding Airplanes Equipped With Pratt & Whitney PW4000 and General Electric CF6-80C2 Series Engines
Model 747 and 747-400 series airplanes, line numbers 1 through 967 inclusive, and 969 through 992 inclusive; certificated in any category; excluding airplanes equipped with Pratt & Whitney PW4000 or General Electric CF6-80C2 series engines; and excluding airplanes on which the strut/wing modification has been accomplished in accordance with AD 95-13-05, amendment 39-9285, AD 95-13-07, amendment 39-9287; or AD 95-10-16, amendment 39-9233.
This amendment supersedes an existing airworthiness directive (AD), applicable to certain Boeing 747 series airplanes, that currently requires replacement of certain fuse pins on the upper link of the inboard and outboard struts. That AD also requires inspections to detect corrosion or cracks of certain fuse pins, and replacement, if necessary. This amendment reduces the compliance times of actions associated with certain fuse pins and provides for optional terminating action for the requirements of this AD. This amendment is prompted by a report of fracturing of a bulkhead style fuse pin located in the inboard strut at the forward end of the upper link. The actions specified in this AD are intended to prevent failure of the strut and separation of an engine from the airplane due to fracturing of the fuse pins.
