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While writing repair dispositions for composite aircraft for the most part I call out EA 9394 to fill in holes of various sizes that needed to be drilled out because of delamination's or whatever. This is considered a structural adhesive and does it's job well. I have been talking to a friend...

I finally got a hold of the Cherry aerospace rep. and he was extremely helpful. The short version is the 2 PN's will get you the same rivet. Here is the Cherry spec. Thank again for all your help. http://www.cherryaerospace.com/doc/stdpage/clock/cr2162.pdf?h=RZzan0wMTvdcaaCuEG1d_w2.

I have been trying to call them all morning and have left messages. I'll keep trying.

I'm looking at some print outs from CHERRYLOCK and CHERRYMAX but they don't have the information I'm looking for so I thought an Aerospace person smarter than myself (as there are countless)may be of some assistance. Does anyone know the difference between CR2162A-4-02 and CR2162-4-02? I can't...

My boss is telling me the change from -5 (UNF threads) to -5A (UNJF)means the threads are different and we can't use them. I can't find anything that shows the threads from a -5 to a -5A makes any difference. Is he correct or is there something I can show him to put his mind at ease?

Thank you so much WKTaylor. The bolt is used for in and out adjustment so I'll check into the newest rev. Thanks again.

Good Morning, Our procurement team is having trouble finding a bolt and has asked engineering for some help. The primary drawing callout is NAS428-5-32 with the alternate being NAS1801-5-64. I can't seem to find the alternate anywhere so I'm not sure if it is even a good number. Is there...

Reworking a part means bringing it back to drawing requirements so changing the PN is not required but repairing means deviating from the original engineering in a way that is still acceptable to engineering. In the case above I changed the type on nutplate used for 2 of the 4 on the nut strip...

Good Morning, I'm hoping to get some input from other engineers that have done Liaison engineering work in aerospace. I just completed my disposition on a discrepant item that changed a couple of nut-plates on a nut-strip because of mis-drilled holes. The last instruction in the disposition...

Thanks for all the great information. Is there any requirement for the notes section of the drawing that call out QQ-P-35-C must be changed to AMS-2700?

I have a vendor telling me that QQ-P-35C, TYP 2 VII has been superseded by AMS-2700. I can't find anything on this so I'm hoping someone here has much greater research powers and can point me in the right direction. Thank you all.

I know this is a little off topic but I'm hoping someone on this site can point me in the right direction. We are a small aerospace company with government contracts to install our products on military aircraft. We may be doing the same for some other aircraft and I was wondering what the...

Good advice guys, thanks.

Good Morning, I'm currently in a discussion with other engineers and QA as to the requirement to prime a buck tail after a solid rivet has been driven. The rivets we use already come chemically treated and the area in question is not painted so I see no reason to prime the driven rivets. Does...

wktaylor, thank you for your concerns. I did some more research and found that sealants with chromate can cause crazing so we have decided to go with PR-1428, Class B. I want to thank you so much for all your help as it did point me in the right direction. Thanks again.

Thank you wktaylor for spending so much time on your response. I should have explained that the window is aprox. 20" x 36" and in a door. It is never removed once installed so we only have one time to get it right. The gap between the window and its frames is causing us to find a better...

We currently have an issue with filling the gap between our window and frames using low adhesion sealant PR-1428, Class A. The sealant is runny and hard to keep in place for forming. The assembly must be pressure tested so complete sealing is required. I'm thinking about using another low...

Thank you RPstress, that is the direction we are heading.

Good Morning all, We have a part that the drawing calls out for 0.050 sheet AISI 304 1/4 Hard but the vendor says all they can get is AISI 301 1/4 Hard. The part is a small (2 1/2") triangular flat pivot bracket. The bracket is 0.050 thick and does not see much stress. It is my opinion that...

Good Morning All, I have been having an in depth discussion with the owner of my company as to when a dash number needs to be rolled. It is my contention that any time the fit, form or function of a part is changed than the dash number must be rolled. He has countered that what happens in the...