Ken -- That's correct -- Section 22 is planned to be included in a Rev scheduled for review at the end of 2008 --- that information was presented to SAE AE2 (who produce Section 22 for RTCA DO 160) by the Air Force representative to Mil 461 -- according to him, the reason there is no lightning testing included at this time is that the Navy and Air Force couldn't agree on pin injection testing -- apparently that was resolved during 2007 and they expect a draft of a new revision to Mil 461 to be available by the end of 2008...
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] From: [email protected] [mailto:[email protected]] On Behalf Of Ken Javor Sent: Friday, December 14, 2007 11:01 AM To: [email protected] Subject: Re: FAA TSO requirements 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 First, I thought that RTCA/DO-160D superseded revision C about 10 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 - 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
