Fuselage - Frame Inner Chord and Web at Station (STA) 727 - Inspections
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Boeing 737 models must perform a general visual inspection for repairs and repetitive high frequency eddy current inspections of the frame inner chord and web at station 727. These inspections must begin by March 17, 2025, the effective date of the AD. If cracks or repairs are found, applicable on-condition repair instructions must be followed promptly to maintain airworthiness.
Summary
The Federal Aviation Administration's Airworthiness Directive 2025-02-02 is a final rule addressing all Boeing 737-100, -200, -200C, -300, -400, and -500 series airplanes. It mandates inspections of the fuselage frame inner chord and web at station 727 to detect cracks and requires applicable on-condition repair actions. This directive aims to ensure structural integrity by preventing cracks from compromising principal structural elements.
What changed
This new airworthiness directive introduces mandatory inspections for cracks in the frame inner chord and web at station 727 on specified Boeing 737 models. It requires an initial inspection for any repairs installed, followed by repetitive high frequency eddy current inspections, and specifies on-condition actions if cracks are found. The directive clarifies that installation of winglets per STC ST01219SE does not affect compliance.
Why it matters
This AD is critical for aviation professionals because undetected cracks in the fuselage frame could lead to structural failure, affecting aircraft safety and airworthiness. Operators and maintenance organizations must comply to avoid potential safety risks and regulatory penalties. The directive also provides clear guidance on inspection intervals and repair requirements, facilitating effective maintenance planning and compliance management.
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