Superseded. This AD was superseded by AD 2021-25-05. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2017-23-02
Effective 12/20/2017 · Published 11/15/2017
Airworthiness Directives; The Boeing Company Airplanes
Summary
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-200, -200C, -300, -400, and -500 series airplanes. This AD was prompted by an evaluation by the design approval holder (DAH) indicating that the fuselage crown skin panels are subject to widespread fatigue damage (WFD). This AD requires repetitive inspections, replacement, and applicable on-condition actions for certain fusel…