Superseded. This AD was superseded by AD 2016-07-31. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2013-22-11
Effective 12/10/2013 · Published 11/05/2013
Airworthiness Directives; The Boeing Company Airplanes
Summary
We are superseding Airworthiness Directive (AD) 2009-10-06 for certain The Boeing Company Model 747-400 and -400D series airplanes. AD 2009-10-06 required repetitive inspections to detect cracks in the floor panel attachment fastener holes of the Section 41 upper deck floor beam upper chords, and corrective actions if necessary; and repetitive post-repair and post-modification inspections, and corrective actions if…