November 23, 2006
Adding a jumper wire is a repair, not a rework, unless the addition of the jumper wire is specifically listed on and allowed by the assembly drawing. A rework is any operation, that is specifically allowed by the drawing. For example, if a hole was drilled in the incorrect location and one fills the hole with epoxy and re-drills the hole in the correct location, this is a repair not a rework unless use of the epoxy is called out on the drawing.
If the drawing is customer provided or customer approved, the customer expects folks to meet the drawing, regardless of what an IPC document may allow. J
Just because an IPC document recognizes use of a jumper wire does not mean folks can use it. For example, IPC documents provide accept/reject criteria for wire wrap. This does not mean folks can do wire wrap unless wire wrap is specified on the drawing.
----- Original Message -----
From: Kevin Glidden<mailto:[log in to unmask]>
To: [log in to unmask]<mailto:[log in to unmask]>
Sent: Wednesday, November 22, 2006 1:48 PM
Subject: [TN] Rework Requires Approval & Vehement Tech
OK, for ANYONE operating in the hi-rel industry, it is widely known and
accepted that assemblies may be reworked without customer approval, but all
repairs require customer approval. Some customers / programs do not even
grant any MRB authority to the vendor. Now, my company is an OEM. We are
not a contract MFR. However, we had a case of a PCB with a via that was
non-functional. A tech wanted to just install a short jumper through the
via to re-establish the connection. Myself and another tech argued this was
a REPAIR and as such required customer approval. The tech in favor of the
jumper argues that jumpers are covered by 610, and therefore allowed. My
rebuttal to this was jumpers are covered not as an implication they are ok
in a repair situation, but to give guidance as to how they should be made if
part of original design intent or part of an authorized repair. He is now
vehemently arguing that unless I can show him where in any IPC standard it
says repair requires customer approval, then I am wrong. Alas, I cannot
find it. Does such a statement exist? My suspicion is that the answer lies
in the contract paperwork for the part, not an IPC document, but if anyone
knows it does exist, and can point me to it, I would be MOST appreciative..
Kevin Glidden
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