AD NUMBER: 2008-13-25
SUBJECT: Airworthiness Directive 2008-13-25 SUMMARY: We are adopting a
new airworthiness directive (AD) for certain Boeing Model 737-300
and -400 series airplanes.
This AD requires testing and inspecting a certain web panel of
the main wheel well pressure deck to determine the material type
and thickness; and related investigative and corrective actions if
This AD results from several reports indicating that cracks
ranging from 0.8 to 8.0 inches long were found on a certain web
panel of the main wheel well pressure deck.
We are issuing this AD to prevent fatigue cracking in the web
panel of the main wheel well pressure deck, which could result in
venting and consequent decompression of the airplane.