Superseded. This AD was superseded by AD 2019-14-15. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2017-25-12
Effective 01/22/2018 · Published 12/18/2017
Airworthiness Directives; The Boeing Company Airplanes
Summary
We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. This AD was prompted by reports of cracking in the webs of the stub beams at certain fuselage stations. These cracks are the result of fatigue caused by cyclical loading from pressurization, wing loads, and landing loads. This AD requires repetitive inspections for cracking…