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AD: Lockheed Martin Corporation/Lockheed Martin Aeronautics Company Airplanes

AD NUMBER: 2015-20-05

PRODUCT: Certain Lockheed Martin Corporation/Lockheed Martin Aeronautics Company Model 188 series airplanes.

ACTION: Final Rule

SUMMARY: This AD was prompted by an evaluation by the design approval holder (DAH) indicating that the upper and lower wing skin planks at the attachment of the main landing gear (MLG) ribs at certain wing-stations are subject to widespread fatigue damage (WFD).

This AD requires an inspection (for cracking) and modification of the chordwise fastener rows of the upper and lower wing planks at the attachments to the MLG ribs at certain wing-stations.

The FAA is issuing this AD to prevent fatigue cracking of the upper and lower wing skin planks at the attachment of the MLG ribs, which could result in failure of the wing.

DATES: This AD is effective November 6, 2015.

FMI: AD

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