AD NUMBER: 2006-11-11
SUBJECT: Airworthiness Directive 2006-11-11 SUMMARY: The FAA is
superseding an existing airworthiness directive (AD), which applies
to certain Boeing Model 757 series airplanes. That AD currently
requires revising the Airworthiness Limitations section of the
maintenance manual (757 Airworthiness Limitations Instructions
(ALI)) to incorporate certain inspections and compliance times to
detect fatigue cracking of principal structural elements (PSEs).
This new AD requires incorporating a new revision to the
Airworthiness Limitations section of the Instructions of Continued
Airworthiness to mandate certain repetitive inspections for fatigue
cracking of PSEs, and adds airplanes to the applicability in the
existing AD. This AD results from a new revision to the ALI. We are
issuing this AD to ensure that fatigue cracking of various PSEs is
detected and corrected; such fatigue cracking could adversely
affect the structural integrity of these airplanes.