In terms of PEDs interfering with aircraft COMM and NAV functions, all that is necessary for commonality between a test aircraft and the fleet is the antennas are in the same place. This assumes coax from antennas to receivers are intact. If we can't make that assumption, then the PEDs cannot be operate during critical periods, period. Ken Javor Phone: (256) 650-5261
> From: Brian Oconnell <[email protected]> > Reply-To: <[email protected]> > Date: Sun, 18 Mar 2012 17:26:19 -0700 > To: 'Pat Lawler' <[email protected]>, <[email protected]> > Subject: RE: New immunity testing by the FAA in the future? > > Cannot be done with any reasonable efficacy for commercial aviation. No > combo of aircraft type, instrument model/version, wiring harness version, > etc is duplicated after about 6 operational months after aircraft has left > factory. > > As private pilot driving small SELs, I have had two instances of > interference: an old cell phone and a laptop computer. The phone antenna was > not seated causing VOR receiver weirdness, and the computer's USB cable was > broken causing the panel-mounted GPS to give bad numbers. > > And emissions limits have no meaning for any particular end use - had a > customer complain about AM radio reception where the tested design has 15dB > margin. Re-test indicated 11dB margin after 30 months in field *WITH* > incorrect wiring, and that signal reception at the 'donut shop' was outside > of the station's intended audience. > > EMC = early mind-capacity loss syndrome for compliance engineers. > > Brian > > -----Original Message----- > From: [email protected] [mailto:[email protected]]On Behalf Of Pat > Lawler > Sent: Sunday, March 18, 2012 4:54 PM > To: [email protected] > Subject: New immunity testing by the FAA in the future? > > Almost sounds like a whole new industry -- the business of testing > aircraft for immunity to personal electronic devices: > http://bits.blogs.nytimes.com/2012/03/18/disruptions-time-to-review-f-a-a- > policy-on-gadgets/ > > Pat Lawler > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <[email protected]> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used > formats), large files, etc. > > Website: http://www.ieee-pses.org/ > 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]> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ 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]>
