Eric:

Not necessarily so.

We use water soluble flux on both NHB5300 and Mil-Std-2000A programs.
Without going into a huge amount of detail in this forum, I'll make the
following points.

#1 - Mil-Std-2000A no longer exists, your customer must be informed of this
reality. However, if they insist, the last known QPL (Qualified Products
List) for Mil-F-14256 (Another obsolete spec referenced in the 2000 spec) is
dated sometime in early 1995. Since you have to pick a qualified RMA flux
from this list, there are absolutely no guarantees that the formulations for
the same flux today is exactly the same as it was 4  years ago. You can
apply the same rationale to many of the reference specs in Mil-std-2000A.

#2 - The use of non-rosin fluxes was allowed in Mil-Std-2000A. One was
simply to get your customer to approve the flux, other options involved
testing. This testing roughly parallels the same kind of testing required
when using a non-rosin flux on J-Std-001A. We have one customer ourselves,
still living in the past with Mil-std-2000A, we are using the data used to
qualify for J-Std-001A as evidence of compliance.

#3 - In NHB5300, Chapter 9 addresses the use of Water Soluble flux. We
simply requested approval from the procuring agency based on the strength of
the testing we did for J-std-001A. We got approval.

In closing, both specs do not require the use of R or RMA. Certainly they
are the preferred since no specific testing other than an Omega Meter type
test is required for use. There are alternatives.


Bill Kasprzak
Moog Inc.
 ----------
From: Eric Kalgren
To: [log in to unmask]
Subject: Re: [TN] Semi-Aqueous Cleaner...
Date: Tuesday, August 17, 1999 10:23AM

We use RMA because NASA's NHB5300 and the MIL-STD-2000A both require the use
of R or RMA flux.  Anything else has to be specially approved by the
military and NASA.  And despite the fact that I have heard that both
documents have been superceded, most of our contracts hold us to those
standards.


Eric Kalgren
BFGoodrich Aerospace
Data Systems Division
(505) 938-5139
[log in to unmask]

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