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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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Could you just please add, on ASD-CERT website, that this qualification is limited to length (L1) up to 15 mm?
In QTR, non-loaded flank of threads and crest of thread maximum depth discontinuities values are 0,09 mm (both).
If I am not mistaken, as per ISO7689, table 9, this value should be 0,12 mm (MJ8x1).
Anyway, this is not blocking since actual requirement in QTR is tougher.
Could you please look at this?
Acceptance test report: for some dimensions, we have AQL = 1% (ISO7689, table 3).
Manufacturing batch size is 249 parts.
Thus, as per ISO7689, tables 3 and 4, we should have a sample size equal to 50 instead 32 in Test Report.
Indeed, in ISO7689 table 4, we have a down-arrow marked against sample size 151 to 280 for AQL = 1%.
For the other dimensional characteristics that are ranked “minor”, with AQL = 2,5% or 4% (ISO7689, table 3), we do agree with sample size 32.
Could you please clarify?
Many thanks in advance,
Best regards.
Dear Julien,
Thank you for the treatment of NAR n°1228 for EN4073-080 (length < 15mm).
-Could you just please add, on ASD-CERT website, that this qualification is limited to length (L1) up to 15 mm?
• Done
-In QTR, non-loaded flank of threads and crest of thread maximum depth discontinuities values are 0,09 mm (both). If I am not mistaken, as per ISO7689, table 9, this value should be 0,12 mm (MJ8x1). Anyway, this is not blocking since actual requirement in QTR is tougher. Could you please look at this?
• Exactly, you’re right. I propose to not update the QTR: are you agree ?
-Acceptance test report: for some dimensions, we have AQL = 1% (ISO7689, table 3). Manufacturing batch size is 249 parts. Thus, as per ISO7689, tables 3 and 4, we should have a sample size equal to 50 instead 32 in Test Report. Indeed, in ISO7689 table 4, we have a down-arrow marked against sample size 151 to 280 for AQL = 1%. For the other dimensional characteristics that are ranked “minor”, with AQL = 2,5% or 4% (ISO7689, table 3), we do agree with sample size 32. Could you please clarify? Many thanks in advance, Best regards.
• As this report is for an initial qualification, according to ISO7689, the sampling size is 20 parts.
Thank you in advance for your treatment,
Have a nice day,
BR,
Sebastien
-In QTR, non-loaded flank of threads and crest of thread maximum depth discontinuities values are 0,09 mm (both). If I am not mistaken, as per ISO7689, table 9, this value should be 0,12 mm (MJ8x1). Anyway, this is not blocking since actual requirement in QTR is tougher. Could you please look at this?
• Exactly, you’re right. I propose to not update the QTR: are you agree ?
=> I agree. Please, just take this into account for future mfg batches.
-Acceptance test report: for some dimensions, we have AQL = 1% (ISO7689, table 3). Manufacturing batch size is 249 parts. Thus, as per ISO7689, tables 3 and 4, we should have a sample size equal to 50 instead 32 in Test Report. Indeed, in ISO7689 table 4, we have a down-arrow marked against sample size 151 to 280 for AQL = 1%. For the other dimensional characteristics that are ranked “minor”, with AQL = 2,5% or 4% (ISO7689, table 3), we do agree with sample size 32. Could you please clarify? Many thanks in advance, Best regards.
• As this report is for an initial qualification, according to ISO7689, the sampling size is 20 parts.
Agreed for Qualification, but for Acceptance (batch release to customer), please, pay attention to AQL=1% for some dimensional characteristics.
Best regards.