MIL-STD-461F does not have lightning requirements included. Ken Javor Phone: (256) 650-5261
> From: "Hopkins, Michael J." <[email protected]> > Date: Fri, 14 Dec 2007 10:41:51 -0500 > To: <[email protected]>, <[email protected]> > Conversation: FAA TSO requirements > Subject: RE: FAA TSO requirements > > Actually, DO-160E is now current (issued December 9, 2004) and Revision > F has been approved by RTCA for publication. Quite a lot of changes > appear throughout the documents. > > RTCA SC-135 has been given approval to begin work on the next revision > and this will start in March 2008. > > Lots going on based on composite airframes -- > > Also, it is expected that Mil 461 will pick up and include Section 22 of > DO 160 (Lightning) in a revision expected to be available for comment by > December 2008. > > Hope this is helpful... > > > Michael Hopkins > Thermo Fisher Scientific > One Lowell Research Center > Lowell, MA 01852 > Tel: +1 978 275 0800 ext. 334 > Fax: +1 978 275 0850 > mobile: +1 603 765 3736 > [email protected] > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of > [email protected] > Sent: Friday, December 14, 2007 9:30 AM > To: [email protected] > Subject: Re: FAA TSO requirements > > I have only a basic understanding of EMC for avionics and I hope that > another forum member can provide more information, but I am willing to > contribute what I know. > > First, I thought that RTCA/DO-160D superseded revision C about 10 years > ago. Revision D updated the susceptibility testing, in particular the > RF susceptibility test methods. Avionics tested to the older standard > might not meet the new standard. > > Second, there have almost certainly been changes over the past 10 years > that would significantly affect the EMC performance of any electronic > device. One problem I have frequently encountered has been die shrinks > from the semiconductor manufacturers. As the semiconductor > manufacturers move their highest performance parts to lines with smaller > features, they are left with older fabrication lines with excess > capacity. They often migrate all of their components to smaller feature > sizes. It lets them get more dies out of a single wafer and increases > profit. Often, everything is shrunk without changing the relative > dimensions of the gates. This can affect susceptibility, and it can > sharpen the edges increasing the broadband noise in emissions. The > smaller gates and conductors can also be much more susceptible to EMC. > > In short, I would think it quite reasonable to requalify a design that > is at least 10 years old. > > Ted Eckert > American Power Conversion/MGE > http://www.apc.com/ > > The items contained in this e-mail reflect the personal opinions of the > writer and are only provided for the assistance of the reader. The > writer is not speaking in an official capacity for APC-MGE or Schneider > Electric. > The speaker does not represent APC-MGE's or Schneider Electric's > official position on any matter. > > > > > Ken Javor > > <ken.javor@emccom > > pliance.com> > To > Sent by: <[email protected]> > > [email protected] > cc > > > > Subject > 12/13/2007 10:18 FAA TSO requirements > > PM > > > > > > > > > > > > > > > > Forum members, > > Lend me your ears. > > I am reviewing RTCA/DO-160C qualification data for some aircraft engine > monitor gauges (rpm, temperature at various points). These devices date > back ten years, plus they were qualified by similarity to an earlier > design - how much earlier is not stated. > > My question is whether any forum members have a feel for how tight this > TSO process really is. It is hard for me to imagine that every part in > these gauges is built exactly like it was ten years ago, or more. I can > see where the individual component part numbers would need to be the > same, but is there any guarantee that the dc/dc converter manufacturer > is building his product the same way, even if he uses the same part > number? What about integrated circuits in general over such a span of > years? > > Thanks in advance, > > Ken Javor > > Phone: (256) 650-5261 > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society > emc-pstc discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > Instructions: http://listserv.ieee.org/request/user-guide.html > > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > > Scott Douglas [email protected] > Mike Cantwell [email protected] > > For policy questions, send mail to: > > Jim Bacher: [email protected] > David Heald: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society > emc-pstc discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > Instructions: http://listserv.ieee.org/request/user-guide.html > > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > > Scott Douglas [email protected] > Mike Cantwell [email protected] > > For policy questions, send mail to: > > Jim Bacher: [email protected] > David Heald: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society > emc-pstc discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > Instructions: http://listserv.ieee.org/request/user-guide.html > > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > > Scott Douglas [email protected] > Mike Cantwell [email protected] > > For policy questions, send mail to: > > Jim Bacher: [email protected] > David Heald: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
