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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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prEN3714 edition P1 seems to be still valid whereas edition P2 is inactive for new design.
This qualification takes into account prEN3714 edition P1.
ISO8788:2000 was applied whereas the latest issue is dated 2020. However, as previously said, this last revision of ISO8788 is an editorial revision, so there is no impact on the parts and on the qualification.
Tensile tests: for both tests (at 80% and 100% loads), the same bolt reference has been used.
At 80% load, the bolt broke ad at 100% load, both bolt and nut broke. For the same bolt reference, we have a difference of approximately 3000 N between these failures. Could you please give more information?
PFC:
– Issue of prEN3714 is dated December 2010, which matches with edition P2. Edition P2 is inactive for new design. Thus, we may consider edition P1.
– Silver plating is carried out as per AMS2410 (at the top of the page) whereas QTR is in line with EN2786. In addition, and silver plating CoC does not mention any conformity to EN2786.
Many thanks in advance,
Best regards.
Dear Julien,
please find below the answers to the opened conditions.
-prEN3714 edition P1 seems to be still valid whereas edition P2 is inactive for new design. This qualification takes into account prEN3714 edition P1 => Howmet SCO confirms No impact on the parts
-ISO8788:2000 was applied whereas the latest issue is dated 2020. However, as previously said, this last revision of ISO8788 is an editorial revision, so there is no impact on the parts and on the qualification => Howmet SCO confirms No impacts on the parts
-Tensile tests:
-for both tests (at 80% and 100% loads), the same bolt reference has been used.
-At 80% load, the bolt broke ad at 100% load, both bolt and nut broke. For the same bolt reference, we have a difference of approximately 3000 N between these failures.
=> Could you please give more information?
=> At 80% HFS SCO used a CRES test bolt with a strength of 1100MPa, whereas at 100% HFS SCO used a Inconel 718 Test bolt with a strength of 1550MPa. That was a typo in the QTR, it has been updated with QTR iss A, see enclosed.
-PFC: – Issue of prEN3714 is dated December 2010, which matches with edition P2. Edition P2 is inactive for new design. Thus, we may consider edition P1.
=> Flow chart updated, see enclosed.
-Silver plating is carried out as per AMS2410 (at the top of the page) whereas QTR is in line with EN2786. In addition, and silver plating CoC does not mention any conformity to EN2786
=> Flow chart updated, see enclosed.
thank you to manage the condition,
Have a nice day,
Sebastien – MB
Many thanks for all these detailed and documented answers.
Approved on my side.
Best regards.