EASA AD US-2019-20-02: Superseded by FAA AD 2019-22-10

What to do

Operators of affected Boeing 737 models must perform detailed inspections of the station 663.75 frame fittings and failsafe straps adjacent to stringer S-18A straps repeatedly as specified. Any detected cracking must be repaired using FAA or Boeing-approved methods. Initial inspection results must be reported to Boeing, and compliance with this directive is effective immediately as of October 3, 2019.

Summary

FAA Airworthiness Directive 2019-20-02 is a final rule addressing all Boeing 737-600, -700, -700C, -800, -900, and -900ER series airplanes. It mandates repetitive inspections for cracking in the left and right side outboard chords of the station 663.75 frame fittings and failsafe straps adjacent to stringer S-18A straps, with required repairs if cracking is found. This directive aims to maintain structural integrity and prevent potential loss of airplane control.

What changed

This new airworthiness directive introduces mandatory repetitive inspections for specific structural areas prone to cracking on certain Boeing 737 models. It requires operators to report inspection results to Boeing and mandates repairs approved by the FAA or Boeing's Organization Designation Authorization. The directive is issued as an interim action pending further rulemaking based on inspection data.

Why it matters

This directive is critical for aviation professionals because undetected cracking in the specified frame fittings could lead to failure of principal structural elements, compromising airplane safety and control. Operators and maintenance teams must ensure compliance to prevent structural failures and maintain airworthiness. The inspections and reporting requirements help gather data to develop long-term solutions.

What to do

Summary

What changed

Why it matters

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