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Conditions for approval required by: Jonathan Paget
Certification of Aerospace Products to international quality Standards
Certification of Aerospace Products to international quality Standards
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I have the following comments:
Dimensional Report – Presume for different batch than have test results for?
– No mention of thread size or checks
– No mention of position tolerance on rivet holes (ISO8878 applies?)
– Squareness of Bearing Surface
Surface Coating – Can see certs for process, but no measurement of Cadmium?
No pictures of marking of part or note of compliance to labelling/packaging.
Before going deeper into the comments, I would like to point out what is stated in the chapter “Additional documents” of this report: The “Nut” (EN4084-040) is a qualified product (PQ551), materials, designs and manufacturing processes and locations are still identical and is currently in production.
Renewal qualification has been performed to verify compliance with the Standards and Technical Specification. And during the past period there have been no customer complaints, see documents posted in chapter “Additional document” of this report “Statement of no customer claim EN4084-040” and Sales “EN4084-040”.
Re-qualification by analogy can be used to reduce the amount of required testing. See for the statements above the AS9133, point 8.1″ Because of what is written here, several quoted comments have already been answered.
-Dimensional Report – Presume for different batch than have test results for?
The Production Lot has a Quantity of 4379 pieces, gives a sample size of 200 parts, as mentioned in the “Dimensional” box in the test report “SD-TR-B605-15370086- rev 4 -1”. These 200 products were randomly selected from the complete batch, as well as the 20 products mentioned in the QTR7441 were also chosen separately (extra) from the production lot.
– No mention of thread size or checks.
Threads have being checked in the same time that he dimensional inspection performed, the result of these tests is noted in the box “ threading” page 3 of the test report “SD-TR-B605-15370086- rev 4 -1”, sampling was 200 parts. All the parts were conform.
– Position tolerance on rivet holes.
(ISO8788 is applied).
Any deviations in form and position, measured at ambient temperature, shall be within the limits specified in the definition document. Suitable limit gauges or measuring instruments. What is clearly the case here is the combination QTR7441 and Test report “SD-TR-B605-15370086- rev 4 -1” (Dimensional box). You can also see in the QTR7441 updated that the tolerances values has been take into account . Some data were updated because it was an error .
– Squareness of Bearing Surface/
This value is measured during the dimensional measured values and is in accordance with the ISO 5858 requirements.
– Surface Coating – Can see certs for process, but no measurement of Cadmium?
Cadmium plating was performed in house, so we haven’t no cert for the process.
Thickness measurement was performed on 20 samples in accordance with ISO 5858 and you can see the value in the Test report updated “SD-TR-B605-15370086- rev 4 -1” (Plating thickness box page 1).
To clearly indicate, photos of the marking have been added (see document enclosed) and also a copy of a label to give an idea that everything is certainly in accordance with the standard.