Aerospace D17.1 Fusion Weld Acceptance and NDE Coordination
An aerospace supplier is welding a thin-wall 15-5 PH stainless bracket to AWS D17.1. The weld is a 1.5 mm GTAW autogenous butt weld. The CWI is asked to accept the weld based on visual inspection only, but the drawing invokes D17.1 Class A. The supplier has PT and RT capability but no qualified RT interpreter available that week. The CWI must decide whether visual-only acceptance is permissible, how to coordinate NDE, and what to do about the missing RT interpreter.
1. Is visual-only acceptance permissible for a D17.1 Class A weld?
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D17.1 defines weld classes with associated inspection requirements. Class A typically requires the most stringent inspection, often including volumetric examination for certain joint types. The CWI must check the drawing and D17.1 class requirements: if volumetric examination is required, visual-only acceptance is not permissible. The CWI should not accept based on visual inspection alone when the contract invokes a class requiring more. The correct action is to hold acceptance until the required NDE is performed by qualified personnel.
2. How should the CWI coordinate PT and RT given the missing RT interpreter?
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The CWI should: (1) confirm the required NDE methods and acceptance criteria from the drawing and D17.1; (2) ensure PT is performed by qualified personnel with current certification and that surface condition is suitable; (3) for RT, either wait for a qualified interpreter or arrange a qualified third-party service; (4) ensure RT technique, IQI selection, and acceptance criteria are documented; (5) not accept interim visual results as final. The CWI should document the hold and the plan to complete NDE.
3. What should the CWI do if production pressure mounts to ship without RT?
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The CWI must not approve shipment without the required NDE. The CWI should escalate to quality management, document the nonconformance and the hold, and require either completion of RT by qualified personnel or a formal deviation approved by the design authority. Shipping without required inspection creates airworthiness and contractual risk. The CWI's signature should reflect only inspections actually performed and accepted.