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Conditions for approval required by: Julien Gauther
Certification of Aerospace Products to international quality Standards
Certification of Aerospace Products to international quality Standards
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Dear all,
Acceptance testing report:
No test results written down for:
• Hardness test – EN3297, table 7, column B for Acceptance,
• Microstructure and grain size – EN3297, table 7, column B for Acceptance,
• Discontinuities (FPI) – EN3297, tables 3 and 4 for Acceptance.
Shall we have actual test results for these tests please?
Surface treatment: silver plating was carried out as per AMS2411. EN3236 specifies EN2786. Could you please clarify?
Many thanks in advance
Best regards
Julien
The NDT report has been included into the QTR section of the report to show Discontinuities meet the requirements of the technical specification.
The Metallurgy report has been included into the QTR section of this report to show hardness, Microstructure and grain size meet the requirements of the technical specification.
in the comments section of the report, the following has been added to address AMS2411 being used to plate the inserts
The Silver plating has been carried out in accordance with AMS2411. The technical specification states that Silver plating is carried out to EN2786. Since the original qualification of Howmet (Arconic, Alcoa, Fairchild Fasteners) in January 2001 they have used the AMS2411 process to silver plate their inserts. This process was approved at the original qualification and all following renewals as well as used to plate the other approved sizes of EN3236 and EN3237 inserts.
Using AMS 2411 to silver plate fasteners is a commonly use process with American manufacturers as its an American owned specification (widely used globally in the fastener industry). AMS 2411 meets all the requirements of EN2786 and follows the same processes, methods and adhesion requirements. There are some differences in the temperatures used for the adhesions tests however the AMS is an increased temperature so harder to meet, resulting in a better plated part.
Therefore, AMS2411 is the method approved and sealed at the qualification of the parts.
Hello Phil,
Many thanks for all these answers.
Approved from my side.
Best regards
Julien